Decision analysis method for carrier pigeon flight meteorological conditions

Abstract

The invention relates to the technical field of flight meteorology, in particular to a carrier pigeon flight meteorological condition decision analysis method, which comprises the following steps: acquiring a geomagnetic disturbance forecast; judging the influence of the geomagnetic environment; setting a flight route; generating flight route passing points; acquiring weather forecast data of the passing point; generating a flight meteorological space-time diagram; and analyzing the flight meteorological space-time diagram and forming a final decision, wherein the decision comprises the selection of the motoring time and the cancellation of the flight plan. According to the method, the meteorological conditions in the whole flight process can be effectively evaluated, the flight plan can be dynamically adjusted according to actual conditions, and the flight safety and the homing success rate of the homing pigeons are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of flight meteorology, and in particular to a decision analysis method for meteorological conditions of pigeon flights. Background Art

[0002] Pigeon racing is a professional event widely participated by pigeon lovers. In addition, as a traditional means of communication, pigeons still play an important role in certain specific occasions (such as the military). Long-distance and ultra-long-distance flights are often performed by pigeon racing and pigeon communications. The flight of pigeons is affected by a variety of meteorological conditions, and weather changes in the passageway during long-distance flights have a significant impact on the safety of pigeon flights. Therefore, it is very necessary to conduct a comprehensive and accurate assessment of the meteorological conditions for pigeon flights.

[0003] At present, the assessment of meteorological conditions for pigeon flights is mostly based on human experience and weather forecasts at the release site. Judging weather conditions suitable for flight based on human experience is not very reliable; and when simply judging based on basic meteorological information at the release site, the changes in meteorological conditions during the journey are not considered. Therefore, there is a lack of a systematic and scientific method to ensure that pigeons can fly safely under suitable meteorological conditions throughout the entire process. Existing weather forecasts usually lack applications specifically for pigeon flight meteorology. Summary of the invention

[0004] In view of the above problems, the present invention proposes a decision-making method for meteorological conditions for homing pigeons, which can not only effectively evaluate the meteorological conditions throughout the flight process, but also dynamically adjust the flight plan according to actual conditions, thereby significantly improving the flight safety and homing success rate of homing pigeons.

[0005] To achieve the above object, the technical solution of the present invention is: a decision method for meteorological conditions of pigeon flight, comprising the following steps: S1. Obtain geomagnetic disturbance forecast and obtain geomagnetic disturbance Kp index; S2. Determine the impact of the geomagnetic environment on pigeon navigation and homing based on the geomagnetic disturbance Kp index, and decide whether to cancel the flight plan; S3. Setting flight routes, including straight routes and non-straight routes; S4, generating waypoints along the flight route, referring to the spatial resolution sampling of the numerical weather forecast model, and generating waypoints along the entire route; S5. Obtaining weather forecast data for the waypoints, wherein the weather forecast data includes meteorological elements such as temperature, wind direction, wind speed, gusts, visibility and weather phenomena; S6, generating a flight weather space-time map, calculating the pigeon flight weather suitability index according to the meteorological elements, and then drawing a flight weather space-time two-dimensional map; S7. Analyze the flight weather time-space diagram and make the final decision, including the selection of the landing time and the cancellation of the flight plan.

[0006] As a further solution of the present invention: in step S1, the obtained geomagnetic disturbance forecast includes geomagnetic disturbance forecasts for the next three days and geomagnetic disturbance forecasts for the next week published by multiple leading institutions, and the leading institutions include but are not limited to the National Space Science Center of the Chinese Academy of Sciences and the Space Weather Prediction Center of the National Oceanic and Atmospheric Administration of the United States. When there are differences in the multiple geomagnetic disturbance forecast results obtained, the most serious forecast result is selected for conservative considerations.

[0007] As a further solution of the present invention: in step S2, the range of the geomagnetic disturbance Kp index and the corresponding degree of influence of the geomagnetic disturbance on the navigation and homing of homing pigeons are as follows: When Kp<5, the impact of geomagnetic disturbance on navigation and homing of homing pigeons is very weak. Homing pigeons can use the earth's magnetic field for navigation normally, and their flying and homing abilities are generally not significantly disturbed. When 5≤Kp<6, geomagnetic disturbances have a slight impact on the navigation and homing of homing pigeons, and begin to have a subtle impact on some particularly sensitive individuals, such as slightly increasing their difficulty in long-distance migration or positioning, but overall most homing pigeons can still navigate effectively; When 6≤Kp<7, geomagnetic disturbances have a moderate impact on the navigation and homing of homing pigeons, and begin to have a more obvious impact on the navigation ability of homing pigeons, which can cause homing pigeons to deviate during flight, appear hesitant when finding their way, take longer to return home, or choose atypical routes during migration. When 7≤Kp<8, geomagnetic disturbances have a strong impact on the navigation and homing of homing pigeons, significantly interfering with the pigeons' magnetic induction ability, causing them to lose their way during flight, increase the homing error rate, and reduce flight efficiency. When 8 ≤ Kp < 9, geomagnetic disturbances have a serious impact on the navigation and homing of homing pigeons. Homing pigeons will have serious disorientation and find it difficult to accurately determine the direction. The flight pattern may become chaotic and in severe cases, they may temporarily lose effective long-distance navigation capabilities. When 9≤ Kp, geomagnetic disturbances have an extreme impact on the navigation and homing of homing pigeons. The navigation of homing pigeons is almost ineffective, and they may even be completely lost, and their flight behavior becomes disordered. According to the range of the geomagnetic disturbance Kp index and the corresponding impact of geomagnetic disturbance on pigeon navigation and homing, it is recommended to continue to consider the original flight plan under the condition of Kp<5, but it is ultimately up to the user to decide whether to cancel the original flight plan. If for some specific training purposes, the conditions can be appropriately and purposefully relaxed.

[0008] As a further solution of the present invention: in step S3, the setting of the straight route only requires setting the geographical coordinates of the release place and the homing place, and the pigeons fly along the shortest path by default; the setting of the non-straight route includes setting the geographical coordinates of the release place, the homing place and the turning point, and the turning points can be set in sequence according to the route arrangement to form a predetermined route.

[0009] As a further solution of the present invention: in step S4, the sampling of the waypoints is performed at intervals along the flight route set in step S3 with reference to the spatial resolution of the numerical weather forecast model, so as to generate the waypoints for the entire journey.

[0010] As a further solution of the present invention: in step S5, the data source of the meteorological elements is selected from the numerical weather forecast model results published by the world's leading meteorological forecasting agencies, and the weather forecast data is the hourly weather forecast data for the near-ground of the entire route for several days in the future, wherein the temperature is recorded as temp, the wind direction is recorded as wd, the wind speed is recorded as ws, the gust is recorded as gust, the visibility is recorded as vis, and the weather phenomenon is recorded as wmo_code. As a further solution of the present invention: in step S3, the setting of the straight route only requires setting the geographical coordinates of the release site and the homing site, and the pigeons fly along the shortest path by default; the setting of the non-straight route includes the setting of the geographical coordinates of the release site, the homing site and the turning point, and the turning point can be set in sequence according to the route arrangement to form a predetermined route.

[0011] As a further solution of the present invention: in step S6, the meteorological suitability index for homing pigeons is denoted as S, and its value range is an integer between 1 and 7, that is, 7 levels, from 1 to 7, respectively: dangerous, unfavorable, poor, moderate, favorable, excellent, and excellent. The calculation formula of the meteorological suitability index for homing pigeons is as follows: S=S0+S wind +S gust +S temp +S vis +S wmocode , Among them: S0 is the basic index, S0=4.

[0012] S wind is the wind speed and direction index, the S windAccording to the flight status, the flight direction is recorded as bearing_deg, the flight status is recorded as status, and the flight status index is recorded as rate. The wind direction wd and the flight direction bearing_deg are set to be unified as 0° from due north to due south, 90° from due east to due west, 180° from due south to due north, and 270° from due west to due east. The value range of wind direction wd and flight direction bearing_deg is ∈ [0°, 360°). Then calculate the difference direct_diff between wind direction wd and flight direction bearing_deg. The specific calculation method is as follows: direct_diff = wd - bearing_deg, Correct the value range of direct_diff to the range of [-180,180). The corrected value is direct_diff′. The specific correction method is as follows: When direct_diff>180°, direct_diff′ = direct_diff - 360°, When direct_diff≤-180°, direct_diff′ = direct_diff + 360°; The absolute value of the corrected direct_diff′ is recorded as abs(direct_diff′), and the specific relationship between the flight state index rate, the wind direction wd, and the flight direction bearing_deg is as follows: If abs(direct_diff′)<30°, the status is “tailwind”, rate=2, If 30°≤abs(direct_diff′)<60°, status is “side tailwind”, rate=1; If 60°≤abs(direct_diff′)<90°, status is “crosswind” and rate=0; If 90°≤abs(direct_diff′)<120°, the status is “side headwind”, and rate=-1; If 120°≤abs(direct_diff′)<150°, the status is “side headwind”, and rate=-2; If 150°≤abs(direct_diff′), the status is “headwind” and rate=-3.

[0013] The wind speed and direction index S wind The specific relationship between the flight status index rate and wind speed ws is as follows: When rate=-3, if ws>5 wind speed, then S wind =-3, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-2, If the wind speed of level 4 is ≥ ws> the wind speed of level 3, then S wind =-1; When rate=-2, if ws>6 wind speed, then S wind =-3, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-2, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-1; When rate=-1, if ws>7 wind speed, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate ≥ 0, if ws> wind speed level 7, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate≤0, if ws<1st wind speed, then S wind =3, If the wind speed of level 1 is ≤ws<the wind speed of level 2, then S wind =2, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then S wind =1; When rate=1, if ws<level 2 wind speed, then S wind =3, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then S wind =2, If the wind speed of level 3 is ≤ws<the wind speed of level 4, then S wind =1; When rate=2, if ws<level 3 wind speed, then S wind =3, If the wind speed of level 3 is ≤ws<the wind speed of level 4, then S wind =2, If the wind speed of level 4 ≤ ws < the wind speed of level 5, then S wind = 1; Finally, if S wind has not been assigned a value yet, then set S wind = 0; Among them, the wind force level of the wind speed is the "Beaufort wind scale";

[0014] S gust is the gust index, and its initial value is 0. When gust ≥ the wind speed of level 8, S gust = -3, When the wind speed of level 8 > gust ≥ the wind speed of level 7, S gust = -2, When the wind speed of level 7 > gust ≥ the wind speed of level 6, S gust = -1; Among them, the wind force level of the gust is the "Beaufort wind scale";

[0015] S temp is the temperature index, and its initial value is 0. When temp ≤ 5°C or temp ≥ 30°C, S temp = -2, When 5°C < temp ≤ 10°C or 30°C > temp ≥ 25°C, S temp = -1.

[0016] S vis is the visibility sub-index, and its initial value is 0. When vis < 5 km, S vis = -2, When 5 km ≤ vis < 10 km, S vis = -1, When vis > 15 km, S vis = 1.

[0017] S wmocode is the weather phenomenon index, and its initial value is 0. When wmo_code = 0 or wmo_code = 1, S wmocode = 2, When wmod_code = 2, S wmocode = 1, When 40 < wmo_code ≤ 50, S wmocode = -1, When 50 < wmo_code ≤ 90, S wmocode = -2, When 90 < wmo_code, S wmocode = -3; Among them, wmo_code is the "World Meteorological Organization Weather Phenomenon Code";

[0018] Finally, if S<1, set S=1, and if S>7, set S=7.

[0019] As a further solution of the present invention: in step S6, the method for drawing the homing pigeon flight meteorological space-time diagram is: the x-axis is time, and the resolution is hours; the y-axis is the distance between each passage point and the homing place and the release place, and the flight meteorological suitability of the coordinate point is represented in the diagram with different colors, then each space-time coordinate point in the flight meteorological space-time diagram is the flight meteorological suitability of the place at the corresponding moment.

[0020] As a further solution of the present invention: in step S7, combined with the judgment of the flying distance and flying speed of the homing pigeon, through the analysis of the flight meteorological space-time diagram, when there is a flight space-time path with higher safety, a suitable release time is selected; when there is no flight space-time path with higher safety, the original flight plan is cancelled.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention realizes a systematic and scientific method for making decisions on meteorological conditions for homing pigeons by comprehensively using technical means such as geomagnetic disturbance forecast, predetermined route setting, numerical weather forecast data, calculation of homing pigeon flight suitability index, and drawing of flight meteorological space-time diagrams. This method can not only effectively evaluate the meteorological conditions throughout the flight process, but also dynamically adjust the flight plan according to actual conditions, which significantly improves the flight safety and homing success rate of homing pigeons, and provides strong technical support for homing pigeon racing events and special-purpose homing pigeon communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a step diagram of the decision-making analysis method for pigeon flight meteorological conditions of the present invention; Figure 2 The straight flight route setting diagram in Example 2 of the present invention; Figure 3 The non-straight flight route setting diagram in Example 2 of the present invention; Figure 4 The meteorological time-space diagram of the pigeon flight in Example 3 of the present invention; Figure 5 This is a schematic diagram of route selection for the meteorological space-time diagram of homing pigeon flight in Example 3 of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] A decision-making method for meteorological conditions of pigeon flight comprises the following steps: S1. Obtain geomagnetic disturbance forecast and obtain geomagnetic disturbance Kp index; S2. Determine the impact of the geomagnetic environment on pigeon navigation and homing based on the geomagnetic disturbance Kp index, and decide whether to cancel the flight plan; S3. Setting flight routes, including straight routes and non-straight routes; S4, generating waypoints along the flight route, referring to the spatial resolution sampling of the numerical weather forecast model, and generating waypoints along the entire route; S5. Obtaining weather forecast data for the waypoints, wherein the weather forecast data includes meteorological elements such as temperature, wind direction, wind speed, gusts, visibility and weather phenomena; S6, generating a flight weather space-time map, calculating the pigeon flight weather suitability index according to the meteorological elements, and then drawing a flight weather space-time two-dimensional map; S7. Analyze the flight weather time-space diagram and make the final decision, including the selection of the landing time and the cancellation of the flight plan.

[0027] In step S1, the geomagnetic disturbance forecast obtained includes the geomagnetic disturbance forecast for the next three days and the geomagnetic disturbance forecast for the next week published by multiple leading institutions. The leading institutions include but are not limited to the National Space Science Center of the Chinese Academy of Sciences and the Space Weather Prediction Center of the National Oceanic and Atmospheric Administration of the United States. When there are differences in the multiple geomagnetic disturbance forecast results obtained, the most serious forecast result is selected for conservative considerations.

[0028] In step S2, the range of the geomagnetic disturbance Kp index and the corresponding degree of influence of the geomagnetic disturbance on pigeon navigation and homing are as follows: When Kp<5, the impact of geomagnetic disturbance on navigation and homing of homing pigeons is very weak. Homing pigeons can use the earth's magnetic field for navigation normally, and their flying and homing abilities are generally not significantly disturbed. When 5≤Kp<6, geomagnetic disturbances have a slight impact on the navigation and homing of homing pigeons, and begin to have a subtle impact on some particularly sensitive individuals, such as slightly increasing their difficulty in long-distance migration or positioning, but overall most homing pigeons can still navigate effectively; When 6≤Kp<7, geomagnetic disturbances have a moderate impact on the navigation and homing of homing pigeons, and begin to have a more obvious impact on the navigation ability of homing pigeons, which can cause homing pigeons to deviate during flight, appear hesitant when finding their way, take longer to return home, or choose atypical routes during migration. When 7≤Kp<8, geomagnetic disturbances have a strong impact on the navigation and homing of homing pigeons, significantly interfering with the pigeons' magnetic induction ability, causing them to lose their way during flight, increase the homing error rate, and reduce flight efficiency. When 8≤Kp<9, geomagnetic disturbances have a serious impact on the navigation and homing of homing pigeons. Homing pigeons will have serious disorientation and find it difficult to accurately determine the direction. The flight pattern may become chaotic and in severe cases, they may temporarily lose effective long-distance navigation capabilities. When 9≤Kp, geomagnetic disturbances have an extreme impact on the navigation and homing of homing pigeons. The navigation of homing pigeons is almost ineffective, and they may even be completely lost, and their flight behavior becomes disordered. According to the range of the geomagnetic disturbance Kp index and the corresponding impact of geomagnetic disturbance on pigeon navigation and homing, it is recommended to continue to consider the original flight plan under the condition of Kp<5, but it is ultimately up to the user to decide whether to cancel the original flight plan. If for some specific training purposes, the conditions can be appropriately and purposefully relaxed.

[0029] In step S3, the setting of the straight route only requires setting the geographical coordinates of the release site and the homing site, and the pigeons fly along the shortest path by default; the setting of the non-straight route includes setting the geographical coordinates of the release site, the homing site and the turning point, and the turning points can be set in sequence according to the route arrangement to form a predetermined route.

[0030] In step S4, the waypoints are sampled with reference to the spatial resolution of the numerical weather forecast model and are sampled at intervals along the flight route set in step S3, thereby generating the waypoints for the entire journey.

[0031] In step S5, the data source of the meteorological elements is selected from the numerical weather forecast model results published by the world's leading meteorological forecasting agencies. The weather forecast data is the hourly weather forecast data for the ground near the entire route points for several days in the future, wherein the temperature is recorded as temp, the wind direction is recorded as wd, the wind speed is recorded as ws, the gust is recorded as gust, the visibility is recorded as vis, and the weather phenomenon is recorded as wmo_code.

[0032] In step S6, the meteorological suitability index for homing pigeons is denoted as S, and its value range is an integer between 1 and 7, that is, 7 levels, from 1 to 7, respectively: dangerous, unfavorable, poor, moderate, favorable, excellent, and excellent. The calculation formula of the meteorological suitability index for homing pigeons is as follows: S=S0+S wind +Sgust +S temp +S vis +S wmocode , Among them: S0 is the basic index, S0=4.

[0033] S wind is the wind speed and direction index, the S wind According to the flight status, the flight direction is recorded as bearing_deg, the flight status is recorded as status, and the flight status index is recorded as rate. The wind direction wd and the flight direction bearing_deg are set to be unified as 0° from due north to due south, 90° from due east to due west, 180° from due south to due north, and 270° from due west to due east. The value range of wind direction wd and flight direction bearing_deg is ∈ [0°, 360°). Then calculate the difference direct_diff between wind direction wd and flight direction bearing_deg. The specific calculation method is as follows: direct_diff = wd - bearing_deg, Correct the value range of direct_diff to the range of [-180,180). The corrected value is direct_diff′. The specific correction method is as follows: When direct_diff>180°, direct_diff′ = direct_diff - 360°, When direct_diff≤-180°, direct_diff′ = direct_diff + 360°; The absolute value of the corrected direct_diff′ is recorded as abs(direct_diff′), and the specific relationship between the flight state index rate, the wind direction wd, and the flight direction bearing_deg is as follows: If abs(direct_diff′)<30°, the status is “tailwind”, rate=2, If 30°≤abs(direct_diff′)<60°, the status is “side tailwind”, and rate=1; If 60°≤abs(direct_diff′)<90°, status is “crosswind” and rate=0; If 90°≤abs(direct_diff′)<120°, the status is “side headwind”, and rate=-1; If 120°≤abs(direct_diff′)<150°, the status is “side headwind”, and rate=-2; If 150°≤abs(direct_diff′), the status is “headwind” and rate=-3.

[0034] The wind speed and direction index S wind The specific relationship between the flight status index rate and wind speed ws is as follows: When rate=-3, if ws>5 wind speed, then S wind =-3, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-2, If the wind speed of level 4 is ≥ ws> the wind speed of level 3, then S wind =-1; When rate=-2, if ws>6 wind speed, then S wind =-3, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-2, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-1; When rate=-1, if ws>7 wind speed, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate ≥ 0, if ws> wind speed level 7, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate≤0, if ws<1st wind speed, then S wind =3, If the wind speed of level 1 is ≤ws<the wind speed of level 2, then S wind =2, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then S wind =1; When rate=1, if ws<level 2 wind speed, then S wind =3, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then Swind = 2, If the wind speed of level 3 ≤ ws < wind speed of level 4, then S wind = 1; When rate = 2, if ws < wind speed of level 3, then S wind = 3, If the wind speed of level 3 ≤ ws < wind speed of level 4, then S wind = 2, If the wind speed of level 4 ≤ ws < wind speed of level 5, then S wind = 1; Finally, if S wind has not been assigned a value yet, then set S wind = 0; Among them, the wind force level of the said wind speed is the "Beaufort wind scale".

[0035] S gust is the gust index, and its initial value is 0, When gust ≥ wind speed of level 8, S gust = -3, When wind speed of level 8 > gust ≥ wind speed of level 7, S gust = -2, When wind speed of level 7 > gust ≥ wind speed of level 6, S gust = -1; Among them, the wind force level of the said gust is the "Beaufort wind scale".

[0036] S temp is the temperature index, and its initial value is 0, When temp ≤ 5°C or temp ≥ 30°C, S temp = -2, When 5°C < temp ≤ 10°C or 30°C > t ≥ 25°C, S temp = -1.

[0037] S vis is the visibility sub-index, and its initial value is 0, When vis < 5 km, S vis = -2, When 5 km ≤ vis < 10 km, S vis = -1, When vis > 15 km, S vis = 1.

[0038] S wmocode is the weather phenomenon index, and its initial value is 0, When wmo_code = 0 or wmo_code = 1, S wmocode = 2, When wmod_code = 2, S wmocode = 1, When 40 < wmo_code ≤ 50, S wmocode = -1, When 50 < wmo_code ≤ 90, S wmocode = -2, When 90 < wmo_code, S wmocode = -3; Wherein, wmo_code is the "World Meteorological Organization Weather Phenomenon Code".

[0039] Finally, if S < 1, then set S = 1; if S > 7, then set S = 7.

[0040] In step S6, the method for drawing the flight meteorological spatio-temporal map of carrier pigeons is as follows: the x-axis is time with a resolution of hours; the y-axis is the distance from each passing place and the homing place to the releasing place, and the flight meteorological suitability of the coordinate points is represented in different colors in the map. Then each spatio-temporal coordinate point in the flight meteorological spatio-temporal map is the flight meteorological suitability of that place at the corresponding moment.

[0041] In step S7, combined with the judgment of the flight distance and flight speed of carrier pigeons, through the analysis of the flight meteorological spatio-temporal map, when there is a flight spatio-temporal path with higher safety, select an appropriate releasing time; when there is no flight spatio-temporal path with higher safety, cancel the original flight plan.

[0042] Example 2

[0043] Reference Figure 2 and Figure 3 , on the basis of Example 1, in step S3, when setting the flight route, when there is satellite positioning data of the historical flight route, the user can use it to formulate a more realistic route; when there is no historical measured route, a straight-line route can still be simply used; when a flight task consists of multiple segmented routes combined, the segmented route setting can be achieved by the custom waypoint method. Typically, when setting the route, the user can fill in the longitude and latitude coordinates or the detailed address name of the place to determine the releasing place and the homing place, and the waypoints can be determined by manually selecting points on the electronic map.

[0044] In step S4, a sampling interval of 0.25° for longitude and latitude can be used to sample the waypoints of the flight route.

[0045] Example 3

[0046] Reference Figure 4On the basis of Example 2, in step S5, in the pigeon flight meteorological space-time map, clicking on the map can open the information box of the corresponding space-time, which can display the local weather forecast information at that time, including weather phenomena, wind speed and direction, gusts, precipitation, temperature, visibility, total cloud cover, air pressure and other meteorological information. At the same time, the vertical shaded area drawn in the map represents night time, and the non-shaded area represents day time.

[0047] refer to Figure 5 , analyzing the range of the diagram, the Zhangye-Shanghai racing pigeon flight meteorological space-time diagram from 0:00 on June 18 to the next 7 days shows that the space-time areas with bad, unfavorable and dangerous levels should be avoided as much as possible. At the same time, considering that this race line is an ultra-long distance of 2000km, the whole journey is expected to take several days or even more than ten days. According to the current weather forecast results, it is not advisable to release the pigeons before June 21, otherwise it is inevitable to encounter unfavorable or even dangerous weather conditions on the way, which may cause major risks to the flight safety and homing rate of racing pigeons. Therefore, the plan can be temporarily set to release the pigeons on the morning of June 21 (the white arrow route indicates a feasible space-time route), and dynamically follow up on the update of weather forecast data in the next few days, redraw and analyze the flight meteorological space-time diagram to correct the decision of the flight plan, so as to maximize the possibility of seeking benefits and avoiding harm.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A decision analysis method for pigeon flight meteorological conditions, characterized in that: The following steps are involved: S1. Obtain geomagnetic disturbance forecast and obtain geomagnetic disturbance Kp index; S2. Determine the impact of the geomagnetic environment on pigeon navigation and homing based on the geomagnetic disturbance Kp index, and decide whether to cancel the flight plan; S3. Setting flight routes, including straight routes and non-straight routes; S4, generating waypoints along the flight route, referring to the spatial resolution sampling of the numerical weather forecast model, and generating waypoints along the entire route; S5. Obtaining weather forecast data for the waypoints, wherein the weather forecast data includes meteorological elements such as temperature, wind direction, wind speed, gusts, visibility and weather phenomena; S6, generating a flight weather space-time map, calculating the pigeon flight weather suitability index according to the meteorological elements, and then drawing a flight weather space-time two-dimensional map; S7. Analyze the flight weather time-space diagram and make the final decision, including the selection of the landing time and the cancellation of the flight plan.

2. The decision analysis method for pigeon flight meteorological conditions according to claim 1, characterized in that: In step S1, the obtained geomagnetic disturbance forecast includes the geomagnetic disturbance forecast for the next three days and the geomagnetic disturbance forecast for the next week published by multiple leading institutions, and the leading institutions include but are not limited to the National Space Science Center of the Chinese Academy of Sciences and the Space Weather Prediction Center of the National Oceanic and Atmospheric Administration of the United States. When there are differences in the multiple geomagnetic disturbance forecast results obtained, the most serious forecast result is selected for conservative considerations.

3. The decision-making method for pigeon flight meteorological conditions according to claim 2 is characterized in that: In step S2, the range of the geomagnetic disturbance Kp index and the corresponding degree of influence of the geomagnetic disturbance on pigeon navigation and homing are as follows: When Kp<5, the impact of geomagnetic disturbance on navigation and homing of homing pigeons is very weak. Homing pigeons can use the earth's magnetic field for navigation normally, and their flying and homing abilities are generally not significantly disturbed. When 5≤Kp<6, geomagnetic disturbances have a slight impact on the navigation and homing of homing pigeons, and begin to have a subtle impact on some particularly sensitive individuals, such as slightly increasing their difficulty in long-distance migration or positioning, but overall most homing pigeons can still navigate effectively; When 6≤Kp<7, geomagnetic disturbances have a moderate impact on the navigation and homing of homing pigeons, and begin to have a more obvious impact on the navigation ability of homing pigeons, which can cause homing pigeons to deviate during flight, appear hesitant when finding their way, take longer to return home, or choose atypical routes during migration. When 7≤Kp<8, geomagnetic disturbances have a strong impact on the navigation and homing of homing pigeons, significantly interfering with the pigeons' magnetic induction ability, causing them to lose their way during flight, increase the homing error rate, and reduce flight efficiency. When 8≤Kp<9, geomagnetic disturbances have a serious impact on the navigation and homing of homing pigeons. Homing pigeons will have serious disorientation and find it difficult to accurately determine the direction. The flight pattern may become chaotic and in severe cases, they may temporarily lose effective long-distance navigation capabilities. When 9≤Kp, geomagnetic disturbances have an extreme impact on the navigation and homing of homing pigeons. The navigation of homing pigeons is almost ineffective, and they may even be completely lost, and their flight behavior becomes disordered. According to the range of the geomagnetic disturbance Kp index and the corresponding impact of geomagnetic disturbance on pigeon navigation and homing, it is recommended to continue to consider the original flight plan under the condition of Kp<5, but it is ultimately up to the user to decide whether to cancel the original flight plan. If for some specific training purposes, the conditions can be appropriately and purposefully relaxed.

4. The decision analysis method for pigeon flight meteorological conditions according to claim 3 is characterized in that: In step S3, the setting of the straight route only requires setting the geographical coordinates of the release site and the homing site, and the pigeons fly along the shortest path by default; the setting of the non-straight route includes setting the geographical coordinates of the release site, the homing site and the turning point, and the turning points can be set in sequence according to the route arrangement to form a predetermined route.

5. The decision analysis method for pigeon flight meteorological conditions according to claim 4 is characterized in that: In step S4, the waypoints are sampled with reference to the spatial resolution of the numerical weather forecast model and are sampled at intervals along the flight route set in step S3, thereby generating the waypoints for the entire journey.

6. The decision analysis method for pigeon flight meteorological conditions according to claim 5 is characterized in that: In step S5, the data source of the meteorological elements is selected from the numerical weather forecast model results published by the world's leading meteorological forecasting agencies. The weather forecast data is the hourly weather forecast data for the ground near the entire route points for several days in the future, wherein the temperature is recorded as temp, the wind direction is recorded as wd, the wind speed is recorded as ws, the gust is recorded as gust, the visibility is recorded as vis, and the weather phenomenon is recorded as wmo_code.

7. The decision analysis method for pigeon flight meteorological conditions according to claim 6 is characterized in that: In step S6, the meteorological suitability index for homing pigeons is denoted as S, and its value range is an integer between 1 and 7, that is, 7 levels, from 1 to 7, respectively: dangerous, unfavorable, poor, moderate, favorable, excellent, and excellent. The calculation formula of the meteorological suitability index for homing pigeons is as follows: S=S0+S wind +S gust +S temp +S vis +S wmocode , Among them: S0 is the basic index, S0=4; S wind is the wind speed and direction index, the S wind According to the flight status, the flight direction is recorded as bearing_deg, the flight status is recorded as status, and the flight status index is recorded as rate. The wind direction wd and the flight direction bearing_deg are set to be unified as 0° from due north to due south, 90° from due east to due west, 180° from due south to due north, and 270° from due west to due east. The value range of wind direction wd and flight direction bearing_deg is ∈ [0°, 360°). Then calculate the difference direct_diff between wind direction wd and flight direction bearing_deg. The specific calculation method is as follows: direct_diff = wd - bearing_deg, Correct the value range of direct_diff to the range of [-180,180). The corrected value is direct_diff′. The specific correction method is as follows: When direct_diff>180°, direct_diff′=direct_diff-360°, When direct_diff≤-180°, direct_diff′=direct_diff+360°; The absolute value of the corrected direct_diff′ is recorded as abs(direct_diff′), and the specific relationship between the flight state index rate, the wind direction wd, and the flight direction bearing_deg is as follows: If abs(direct_diff′)<30°, status is "tailwind", rate=2; If 30°≤abs(direct_diff′)<60°, status is "side tailwind", rate=1; If 60°≤abs(direct_diff′)<90°, status is "crosswind" and rate=0; If 90°≤abs(direct_diff′)<120°, the status is "side headwind" and rate=-1; If 120°≤abs(direct_diff′)<150°, the status is "side headwind", and rate=-2; If 150°≤abs(direct_diff′), status is "headwind", rate=-3; The wind speed and direction index S wind The specific relationship between the flight status index rate and wind speed ws is as follows: When rate=-3, if ws>5 wind speed, then S wind =-3, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-2, If the wind speed of level 4 is ≥ ws> the wind speed of level 3, then S wind =-1; When rate=-2, if ws>6 wind speed, then S wind =-3, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-2, If the wind speed of level 5 is greater than or equal to ws and greater than the wind speed of level 4, then S wind =-1; When rate=-1, if ws>7 wind speed, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate ≥ 0, if ws> wind speed level 7, then S wind =-3, If the wind speed of level 7 ≥ ws> the wind speed of level 6, then S wind =-2, If the wind speed of level 6 ≥ ws> the wind speed of level 5, then S wind =-1; When rate≤0, if ws<1st wind speed, then S wind =3, If the wind speed of level 1 is ≤ws<the wind speed of level 2, then S wind =2, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then S wind =1; When rate=1, if ws<level 2 wind speed, then S wind =3, If the wind speed of level 2 is ≤ws<the wind speed of level 3, then S wind =2, If the wind speed of level 3 is ≤ws<the wind speed of level 4, then S wind =1; When rate=2, if ws<level 3 wind speed, then S wind =3, If the wind speed of level 3 is ≤ws<the wind speed of level 4, then S wind =2, If the wind speed of level 4 is ≤ws<the wind speed of level 5, then S wind =1; Finally, if S wind If it has not been assigned a value, set S wind =0, Wherein, the wind speed is of the Beaufort scale; S gust is the gust index, with an initial value of 0. When gust ≥ 8 wind speed, S gust =-3, When the wind speed of level 8>gust≥level 7, S gust =-2, When the wind speed of level 7>gust≥level 6, S gust =-1; Wherein, the wind force level of the gust is "Beaufort scale"; S temp is the temperature index, and its initial value is 0. When temp≤5℃ or temp≥30℃, S temp =-2, When 5℃ < temp ≤ 10℃ or 30℃ > t ≥ 25℃, S temp = -1; S vis is the visibility index, with an initial value of 0. When vis<5km, S vis =-2, When 5km≤vis<10km, S vis =-1, When vis>15km, S vis =1; S wmocode is the weather phenomenon index, with an initial value of 0. When wmo_code=0 or wmo_code=1, S wmocode =2, When wmod_code=2, S wmocode =1, When 40 < wmo_code ≤ 50, S wmocode = -1, When 50 < wmo_code ≤ 90, S wmocode = -2, When 90 < wmo_code, S wmocode = -3; Among them, wmo_code is the "World Meteorological Organization Weather Phenomenon Code"; Finally, if S<1, set S=1, and if S>7, set S=7.

8. The decision-making method for pigeon flight meteorological conditions according to claim 7, characterized in that: In step S6, the method for drawing the homing pigeon flight meteorological space-time diagram is: the x-axis is time, and the resolution is hours; the y-axis is the distance between each passing point and the homing point and the release point, and different colors are used to represent the flight meteorological suitability of the coordinate points in the diagram, then each space-time coordinate point in the flight meteorological space-time diagram is the flight meteorological suitability of the place at the corresponding moment.

9. The decision-making method for pigeon flight meteorological conditions according to claim 8, characterized in that: In step S7, combining the judgment of the flying distance and flying speed of the homing pigeon, by analyzing the flight meteorological time-space diagram, when there is a flight time-space path with higher safety, an appropriate release time is selected; When there is no safer flight space-time path, cancel the original flight plan.

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