Method for locating elevation of satellite navigation communication terminal
A satellite communication and elevation technology, which is applied in the field of satellite mobile navigation and positioning, can solve problems such as inability to achieve accurate elevation positioning, and achieve the effect of improving accuracy and stability and high accuracy of elevation measurement
Active Publication Date: 2015-04-29
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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However, the existing satellite navigation communication terminals cannot achieve precise positioning
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[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. While illustrations of parameters containing particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints.
[0014] The master control station is one of the necessary components in the forwarding satellite navigation and positioning system, and there are a large number of base stations and a large number of meteorological data collection stations in the ground mobile communication network. These master control stations, base stations and weather stations are all existing foundations Construction equipment can easily measure their elevatio...
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The invention discloses a method for locating an elevation of a satellite navigation communication terminal. The method comprises the steps that a meteorological station measures and obtains the air pressure value P0, the temperature value T0 and the humidity parameter (e / p)m of the location of the meteorological station, and the air pressure value P0, the temperature value T0, the humidity parameter (e / p) m and the latitude and the location elevation H0 of the meteorological station are sent to a master control station together; the master control station sends the air pressure value P0, the temperature value T0, the humidity parameter (e / p) m, the latitude and the location elevation H0 to a satellite through the antenna of the master control station in an uplink mode; a user terminal acquires the air pressure P0, the temperature value T0, the humidity parameter (e / p) m, the latitude and the location elevation H0 of the meteorological station through the satellite; the user terminal measures and obtains the air pressure value P and the temperature value T of the location of the user terminal; the user terminal obtains the measurement elevation h' of itself by combining the air pressure value P0, the temperature value T0, the humidity parameter (e / p) m, the latitude and the location elevation H0 of the meteorological station with the air pressure P and the temperature T, measured by itself, of the location. The information of the meteorological station is used for measuring the elevation of the satellite navigation communication terminal, and elevation measurement accuracy is high.
Description
technical field [0001] The invention relates to the field of satellite mobile navigation and positioning, in particular to a method for elevation positioning of a satellite navigation communication terminal. Background technique [0002] In the existing satellite navigation system, since satellite communication terminal users are always located on the ground, they can only observe and receive satellite signals in the direction of their own zenith in the direction of the user's elevation, but cannot observe and receive the direction of their "sole" Therefore, a good measurement constraint benchmark cannot be formed in the elevation direction, which makes the vertical precision factor VDOP of the satellite positioning system naturally poor, that is, the positioning accuracy in the elevation positioning direction is poor. The demand for navigation based on location-based services is increasing, especially in indoor emergency and disaster relief situations. However, the existin...
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IPC IPC(8): G01C5/06
Inventor 胡正群张丽荣施浒立
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI