789 results about "Ephemeris" patented technology

The invention relates to a space-ground integrated Beidou high-precision positioning method applied to urban canyons, and belongs to the technical field of navigation positioning. The method comprises the following steps: deploying a pseudo satellite base station, calibrating coordinates of the base station through carrier phase difference, and monitoring the number of Beidou visible satellites; a master pseudo-satellite is determined, timestamps and ephemeris data are broadcasted to slave pseudo-satellites through Beidou short messages, and the slave pseudo-satellites are combined with bidirectional ranging data to correct a local clock to realize high-precision synchronization; receiving Beidou and pseudo-satellite signals by a user terminal, screening effective observation values through a shielding judgment mechanism, substituting the effective observation values into a non-difference observation equation in combination with pseudo-satellite reference difference data, and resolving a fusion result through an elastic coupling mode; and finally, multi-path interference is identified by using pseudo-satellite double antennas, and historical data is called to construct an error model to correct a fusion result. The space-ground integrated positioning of Beidou and pseudo satellites in an urban canyon scene is realized, the centimeter-level positioning precision is stably output, and the high-precision positioning requirements of urban traffic, surveying and mapping and the like are met.

The invention belongs to the technical field of time service, and relates to a Beidou time service delay processing method and device based on PPP-B2b. The method comprises the following steps: acquiring a navigation signal of a current epoch to obtain an observation value, a broadcast ephemeris and precise point positioning service information; obtaining a precision satellite position and a precision satellite clock error according to the broadcast ephemeris and the precision single-point positioning service information; forecasting to obtain a forecast value; calculating a difference value between the forecast value and the observation value, when the difference value does not exceed a preset threshold value, establishing a satellite pseudo-range and carrier phase ionosphere-free combination observation equation, establishing an antenna position constraint virtual observation equation, and performing resolving according to the combination observation equation and the virtual observation equation to obtain a receiver clock error result; and correcting the pulse per second according to a clock error result of the receiver so as to carry out delay time service. According to the invention, accurate time service can be realized, interference and environmental influence are avoided, and the convergence speed is high.

A Beidou / GNSS-based real-time high-precision sea surface measurement method and a buoy, wherein by using free-to-use broadcast ephemeris freely broadcast by GNSS satellites, precise point positioning of China's Beidou satellites, and other high-precision service space signals, real-time centimeter-level element information comprising time, longitude, latitude, water level, wave height, wave period, wave direction, sea surface current velocity and direction, atmospheric water vapor content, and the like can be directly obtained. The information can be stored locally in a buoy or transmitted back by communication, and is suitable for real-time high-precision sea surface measurements in offshore and far-sea scenarios.

The invention provides a regional interference signal detection method and device based on a Beidou router, and the method comprises the steps: obtaining reference broadcast ephemeris data of a network platform and local ephemeris data received by the Beidou router, carrying out the data integrity calculation, and judging whether the local ephemeris data are missing or not; performing same-epoch data comparison on the reference broadcast ephemeris data and the local ephemeris data, and judging whether the local ephemeris data has deception signals or not; calculating a visible satellite integrity rate in a fixed time window based on the observation data of the Beidou router, and judging whether interference signals exist in the observation data or not; analyzing by utilizing the cycle slip ratio and the carrier-to-noise ratio of the observation data, and judging whether interference signals exist in the observation data or not; under the condition that local ephemeris data do not have missing and deception signals and the observation data do not have interference, whether the observation data have the deception signals or not is judged based on pseudo-range single-point positioning and inter-epoch carrier phase difference velocity measurement, and the method can improve the reliability of Beidou signal interference detection.

Disclosed is a BeiDou satellite ephemeris prediction method and system based on a water-wave parallel network. The method includes: receiving broadcast ephemeris data; calculating according to the broadcast ephemeris data to obtain a sequence of extrapolation errors and historical extrapolated states; and inputting the sequence of extrapolation errors and the historical extrapolated states into a pre-trained prediction model to output an error prediction result. The system includes: a data receiving module, a dynamical calculation module, an error prediction module and a correction module. The present disclosure allows for accurate ephemeris prediction at a lower computational cost, and can be widely applied in the field of trajectory prediction.

The invention relates to the technical field of satellite internet, in particular to a low-orbit satellite communication system positioning method and a terminal. Comprising the following steps: a user terminal receives satellite broadcast to obtain ephemeris information at the current moment and position information of a wave position center point, and carries out initial time delay estimation and initial frequency offset estimation; then the user terminal carries out time-frequency pre-compensation processing on the PRACH signal according to the initial time delay and frequency offset estimation and sends the PRACH signal to a satellite; and after the satellite captures the PRACH signal, positioning the user terminal corresponding to the PRACH signal according to the residual time delay and the residual frequency offset carried in the PRACH signal and the position of the wave position center point. Therefore, under the condition of not depending on GNSS information, the satellite side can position the GNSS-free terminal.

The invention relates to the technical field of landslide geological disaster hidden danger point identification, in particular to a landslide hidden danger point identification method based on an air-space remote sensing fusion neural network, which comprises the following steps: acquiring satellite SAR data, a digital elevation model, a vector boundary map and a precision orbit ephemeris of a research area; carrying out interference processing on the InSAR data, and carrying out deformation rate inversion, terrain residual error correction and atmospheric delay phase modeling and correction; preprocessing an original high-resolution remote sensing image, interpreting a high-resolution image, and outputting spatial distribution of suspected landslide hidden danger points in a research area; planning an aerial survey route of the unmanned aerial vehicle, and performing distortion correction, feature matching, dense point cloud generation and orthoimage generation processing; performing multi-dimensional feature analysis, and performing comprehensive interpretation in combination with an expert knowledge base; according to the method, the key effect of the multi-source remote sensing fusion technology in landslide hidden danger monitoring is displayed from data acquisition to hidden danger recognition.

The invention relates to the technical field of communication networks, in particular to a resource allocation system and method in a satellite-ground fusion network, and the system comprises a satellite-ground topology and channel evolution predictor which is used for obtaining satellite ephemeris, user GNSS positioning and moving vectors, ground base station topology and a real-time CQI / RSRP measurement report; generating future link state information; the business QoE impact and switching cost modeling device is used for calculating transient interruption time of a switching action; generating switching cost information; the continuity risk quantification engine is used for generating continuity risk information containing the link maintaining risk probability, the instantaneous impact collapse probability and the link switching risk probability; the risk evasion type resource decision-making device is used for calculating maintenance link comprehensive cost and switching link comprehensive cost; calculating a dynamic switching damping threshold value; generating risk avoidance decision information; according to the invention, the high-frequency ping-pong switching near the edge state point is effectively inhibited, and the signaling overhead caused by invalid switching is reduced.

The invention provides a GNSS data quality prediction method and device based on a fisheye camera, and a medium, and belongs to the technical field of data processing, and the method comprises the steps: determining the satellite orbit information of a future time period with a to-be-evaluated observation station as a reference point based on ephemeris prediction; according to the fisheye sky image shot at the to-be-evaluated observation station and the satellite orbit information, determining satellite feature data of a future time period and the occlusion porosity of the future time period; respectively inputting the occlusion porosity of the future time period and at least part of satellite feature data of the future time period into a general prediction model and an observation station prediction model corresponding to the observation station to be evaluated for data quality evaluation, and obtaining a first data quality evaluation index and a second data quality evaluation index; and determining a data quality prediction result based on the first data quality evaluation index and the second data quality evaluation index. A general prediction model and an observation station exclusive prediction model are introduced to carry out double-model evaluation, and accurate prediction of GNSS observation data quality is realized.

The invention relates to the technical field of spacecraft orbit control and space safety, and discloses a space debris orbit prediction and avoidance method, which comprises the following steps that: a ground computing center screens candidate targets and generates enhanced data packets for uploading; the spaceborne computer combines real-time navigation data to carry out geometric feature screening, and an instant high-risk target list is generated; controlling the star sensor to execute optical observation, and resolving an optical measurement relative orbit state by utilizing displacement superposition and Kalman filtering; selecting a high confidence coefficient or a conservative probability threshold according to the optical measurement state acquisition condition, and generating an avoidance instruction when the collision probability exceeds the limit; and the propulsion system responds to the instruction to execute avoidance, verifies the effect by confirming the semi-major axis variation and executes track recovery by selecting an aircraft. According to the method, the ground-air collaborative screening and shift superposition enhancement technology is adopted, the problems that the low-precision ephemeris false alarm rate is high and the detection capability of a satellite-borne sensor on a dark and weak target is insufficient are solved, and the accuracy of evasion decision making and the execution reliability are improved.

The invention discloses an internet constellation dynamic routing optimization method and system, and the method comprises the steps: setting orbit plane parameters and satellite parameters, and carrying out the modeling of an orbit and a constellation; performing link visualization and time-varying graph generation according to ephemeris data and the constructed constellation model; defining a related space, a network and a function based on a deep reinforcement learning algorithm; and based on an MADDPG framework, introducing a multi-agent collaborative decision-making mechanism, and outputting action selection and execution results after collaborative optimization. The system comprises a model construction module, an embedding module, a reinforcement learning design module and a collaborative optimization module. By using the method, the dynamic change of the low-orbit satellite network can be effectively dealt with, satellite resources are fully utilized, and efficient and reliable communication is realized. The method can be widely applied to the field of wireless communication.

The invention belongs to the technical field of satellite positioning, and particularly discloses a high-precision PPP (Point-to-Point Protocol) positioning method based on SSR (Simple Sequence Repeat) correction prediction, which comprises the following steps that: a receiver receives and stores an SSR correction in real time to obtain an SSR sequence; inputting the stored SSR sequence into a pre-trained prediction model, and outputting an SSR correction number prediction value in a future time period; the broadcast ephemeris is corrected through the predicted SSR correction number, and a precise satellite orbit and clock correction are obtained; and constructing an ionosphere-free combination model based on the double-frequency observation value, and resolving the position of the receiver through Kalman filtering in combination with the corrected satellite orbit and clock correction. According to the method, long-time-sequence prediction is carried out on the SSR correction number through the prediction model, the problem of positioning precision jump caused by satellite correction data interruption is effectively solved, it is guaranteed that PPP positioning continuously outputs centimeter-level precision results under the scenes of signal shielding, network delay and the like, and the limitation that traditional PPP strongly depends on real-time SSR data is broken through.

The invention provides a low-orbit navigation constellation autonomous orbit determination method and system under a weak inter-satellite topological structure, and relates to the technical field of satellite orbit determination, and the method comprises the steps: obtaining various observation data of an inter-satellite link on a predetermined orbit, and carrying out the preprocessing of the various observation data; establishing a synchronous observation equation of orbit and clock correction parameters by adopting a segmented linear polynomial satellite clock correction modeling method, generating orbit, clock correction and related error parameters combining satellite-borne GNSS and inter-satellite link data, and forecasting; based on an error analysis result, multiple key features are extracted from the generated orbit, clock error and related error parameters to serve as input of a parameter prediction model, and a parameter time sequence of four types of prediction including relative weight, inter-satellite link hardware delay, low-orbit satellite clock error and unmodeled error is obtained through output; and uploading the predicted parameter time sequence and the broadcast ephemeris to a main satellite together, and transmitting to each sub-satellite by the main satellite through an inter-satellite link to realize distributed autonomous orbit determination of the sub-satellites.

The invention discloses a satellite Internet of Things distributed node parallel transmission acceleration method, which relates to the technical field of satellite Internet of Things, and comprises the following steps: dynamically fragmenting, splitting into N fragments according to a network load rate and a node state, adding a serial number, a check code and redundant information, and marking a head as {INJ}; the intelligent routing is used for distributing fragments to distributed nodes through a scoring function based on satellite ephemeris, node loads and link quality; dynamic path switching: monitoring link and node states, and switching to a better path when the performance does not reach the standard; fault-tolerant recombination is carried out, recombination is carried out according to sequence numbers, if missing fragments are few, erasure codes are used for recovery, and if missing fragments are more, local retransmission is carried out. Through parallel transmission, dynamic switching and fault-tolerant recombination, the transmission rate, throughput and robustness are improved, node loads are balanced, and the performance of the satellite Internet of Things is optimized.

The embodiment of the invention provides a downlink signal sending method and a downlink signal processing method, which are characterized in that a downlink signal is obtained on the satellite side based on a supplementary synchronization sequence, and then time-frequency synchronization is carried out on the terminal equipment side by using the downlink signal from the satellite. In the application, the terminal device can realize time-frequency offset tracking compensation without acquiring satellite ephemeris information and using GNSS (Global Navigation Satellite System) equipment, so that the influence of ephemeris errors and GNSS errors on time-frequency synchronization performance after the terminal device is shut down for a long time is eliminated, and the problem that the time-frequency synchronization performance of the terminal device is influenced in the related technology is solved. The problem of low precision of time-frequency offset tracking compensation in the satellite-ground communication process is solved, and the time-frequency synchronization success rate of satellite-ground communication under the conditions of inaccurate ephemeris and high speed is improved.

The invention discloses a low-power-consumption data transmission method for a low-orbit satellite internet-of-things terminal, and relates to the technical field of satellite communication, and the method comprises the steps: calculating an overhead time window through employing a satellite ephemeris and a terminal GNSS coordinate, and introducing atmospheric refraction and movement position correction; determining a wake-up advance containing equipment preheating and error compensation, and waking up the terminal before the window; the battery voltage is collected, and three strategies of band cascade coding, compression and error correction sending and only data abstract sending are divided according to the electric quantity; receiving satellite dynamic energy factors to adjust transmitting power and the number of data packets; and after completion, entering dormancy, and only leaving a low-power-consumption clock to maintain a time sequence. Through accurate awakening, hierarchical transmission, double-clock calibration and self-learning, the terminal endurance is prolonged, the access success rate and the link utilization rate are improved, and power consumption and reliability are balanced.

The invention relates to the technical field of dual-mode interphones, and discloses an AI-based dual-mode interphone satellite communication noise reduction method and system, and the method comprises the steps: carrying out the orbit equation solving of satellite ephemeris data, and obtaining a satellite elevation angle and a channel fading parameter; receiving a first voice signal through a dual-mode interphone, and identifying a modulation mode according to the first voice signal; calculating a first noise reduction mask according to the channel fading parameter and the modulation mode; compressing the standard noise reduction neural network to form a lightweight noise reduction model; and starting an FM spectrum subtraction branch or a TETRA filtering branch in the lightweight noise reduction model according to the modulation mode, and performing frequency domain processing on the first noise reduction mask and the first voice signal to obtain a second voice signal, thereby providing stable and reliable real-time voice noise reduction capability for the portable dual-mode interphone in a dynamic satellite environment.

The invention discloses a satellite navigation positioning method and device based on scene recognition, electronic equipment and a storage medium, and belongs to the technical field of satellite navigation positioning, and the method comprises the steps: determining the geometric space characteristics of each satellite according to the observation time, the satellite number of each satellite and preset satellite ephemeris information; according to the observation time, the satellite pseudo-range of each satellite and the satellite distance change rate of each satellite, determining the signal quality characteristics of each satellite; determining a satellite observation feature set based on the geometric space features of the satellites and the signal quality features of the satellites; inputting the satellite observation feature set and the satellite signal-to-noise ratio of each satellite into a preset scene recognition model to generate a scene category; and determining the positioning coordinate of the satellite navigation receiver according to the scene category in combination with the satellite signal-to-noise ratio of each satellite and the satellite pseudo-range of each satellite. According to the invention, the problem that satellite navigation positioning is not accurate enough in the prior art can be solved.

An ARAIM availability prediction method under a complex terrain environment is provided. The method includes: 1) selecting positioning points according to an air line; 2) calculating terrain shielding angles; 3) predicting visible satellites; 4) determining a fault mode that needs to be monitored; 5) calculating a positioning error variance, an influence coefficient of a nominal deviation, and a variance of a solution separation test statistic; and 6) calculating a threshold of a solution separation test, calculating a protection level, and determining availability. According to the method, the terrain shielding angles are calculated based on terrain model data, and the visible satellites are predicted based on ephemeris data or almanac data to further calculate a protection level, while determining the availability; and the accuracy of availability prediction can, by considering the effect of terrain barriers on the prediction of the visible satellites, be improved to ensure the safety of aircrafts.

The invention discloses a feed frequency offset compensation method and a communication system. The method comprises the following steps: a satellite communication management module obtains ephemeris information of a satellite and position information of a gateway station, and determines a first Doppler frequency offset of a feed link between the satellite and the gateway station according to the ephemeris information and the position information; obtaining a test frequency offset obtained by performing frequency estimation on a measurement signal transmitted on the feed link, and determining a feed frequency offset of the feed link according to the test frequency offset and the first Doppler frequency offset; and transmitting the feed frequency offset to the compensation module. The compensation module receives a message sent by the satellite communication management module; detecting whether the information contains the feed frequency offset of the feed link; and under the condition that the message contains the feed frequency offset, performing frequency offset compensation on the signal transmitted on the user link according to the feed frequency offset. According to the invention, the technical problem of feed frequency offset caused by unstable clock due to improvement of the working frequency of the feed link is solved.

The invention relates to the technical field of NTN, and discloses a 5G NTN-based multi-mode steganography communication method and a satellite ground communication system, and the method comprises the steps: a ground transmitting terminal selects at least one of voice steganography, text steganography or protocol layer steganography, and generates a multi-mode steganography data stream; performing high-orbit channel optimization processing on the multi-modal steganography data stream, packaging the optimized multi-modal steganography data stream to a physical layer frame adaptive to the 5G NTN standard, and injecting an ephemeris prediction label; the GEO relay satellite forwards the data to a ground receiving end; and the ground receiving end receives and de-encapsulates the multi-mode steganography data stream to obtain the multi-mode steganography data stream, and extracts steganography data from the multi-mode steganography data stream according to an extraction rule corresponding to the steganography mode. According to the embodiment of the invention, through a multi-mode steganography mode, in combination with 5GNTN physical layer frame packaging, the compatibility of an NTN protocol is improved, the steganography data is prevented from being analyzed into abnormal signals by a protocol stack and discarded, and the reliability of covert communication is improved.

The invention provides a precise point positioning method and system based on broadcast ephemeris satellite clock speed forecast, and the method comprises the steps: collecting broadcast ephemeris clock speed data, and filtering the broadcast ephemeris clock speed data through a dynamic sliding window; preprocessing the filtered broadcast ephemeris clock speed data, and removing abnormal state data to obtain preprocessed broadcast ephemeris clock speed data; fitting the preprocessed broadcast ephemeris clock speed data by adopting a linear period combination model and utilizing a least square method to obtain a fitted clock speed model of each satellite, and obtaining a satellite clock speed predicted value based on the fitted clock speed model; according to the satellite clock speed predicted value, user information and satellite information are combined, user equivalent distance measurement errors of a satellite orbit and clock error jump when broadcast ephemeris of each satellite is updated are calculated, the user equivalent distance measurement errors are applied to precise single-point positioning data for calculation and adjustment, and a corrected precise single-point positioning result is obtained.

The invention discloses a complex terrain communication method and device based on multiple satellites and a storage medium, and the method comprises the steps: determining a navigation path and a moving speed of terminal equipment, and determining the track information of the terminal equipment in a preset time period relative to a current moment in real time; determining three-dimensional terrain information in the coverage area corresponding to the trajectory information based on the trajectory information corresponding to the terminal equipment; determining satellite docking information corresponding to each spatio-temporal trajectory point based on trajectory information corresponding to the terminal equipment, ephemeris information of a plurality of satellites and three-dimensional terrain information; determining a docking switching point according to the satellite docking information corresponding to each spatio-temporal trajectory point, and determining a switching vector based on the docking switching point; and determining a target switching strategy by using a particle swarm optimization algorithm according to a preset target function and the switching vector, and performing satellite switching according to the target switching strategy.

The invention provides an inter-satellite laser link establishment method and device and a communication system, and aims to solve the problems of inter-satellite link establishment delay and regional limitation caused by dependence of a ground operation control system, and the method comprises the steps: responding to identification information, sent by a first satellite, of a second satellite, and sending link establishment parameters to the second satellite through the first satellite; in response to a confirmation instruction fed back by a second satellite through the first satellite, constructing a laser communication link with the second satellite; wherein the second satellite and the local satellite are located in the service domain of the first satellite. The first satellite serves as a measurement and control hub and forwards link establishment requirements and parameters in real time. Therefore, autonomous link establishment is realized, the uncertain domain is reduced by using the high-precision real-time ephemeris, and the link establishment success rate and efficiency are improved.

The invention discloses a multi-frequency omnidirectional unmanned aerial vehicle active defense system and method, and the method comprises the steps: obtaining defense region parameters, and constructing a navigation signal generation task library based on the coverage requirements of GPSL1 and Beidou B1 / B2 / B3 frequency bands; resonance interference points are determined through carrier locking resonance analysis, Doppler frequency shift traps are designed, frequency shift fragility features are extracted in combination with C / A code recombination processing, and a targeted interference enhancement domain is constructed; the method comprises the following steps: respectively carrying out constellation topology reconstruction on a GPS (Global Positioning System) and a Beidou system, generating false orbit parameters through ephemeris data tampering, and forming a mixed defense signal domain by utilizing carrier phase interleaving processing; analyzing signal power to determine strong and weak interference areas, and setting graded attenuation parameters to construct a graded signal attenuation field; the attenuation field and the interference enhancement domain are fused to generate dynamic simulation parameters, false orbit parameters are adjusted in real time to generate a coordinate input mode, a high-dynamic navigation signal is reconstructed, a satellite working mode is selected, an L1 / B1 / B2 / B3 multi-band radio frequency output instruction is finally generated, and all-dimensional intelligent deception jamming of the unmanned aerial vehicle navigation system is achieved.

The invention discloses a radiation correction method and system for an airborne hyperspectral imager. The radiation correction method and system are used for improving the radiation correction precision in complex weather. The method comprises the following steps: calculating a theoretical sun position based on unmanned aerial vehicle initial coordinates, ephemeris data and atmospheric parameters; performing course and differential compensation on a solar azimuth angle by combining IMU course and wind speed and direction data, performing refraction correction on an elevation angle, and outputting a high-precision sun position parameter; hyperspectral images and irradiance data are synchronously acquired, quaternion interpolation is combined with IMU data to realize space-time alignment, and attitude disturbance is eliminated; a hemispherical space irradiance model is constructed based on alignment data, cloud layer modes (clear sky, thin cloud and thick cloud) are divided according to atmospheric optical thickness variance, and Lambert body proportion correction, a discrete longitudinal standard method or a deep convolutional spectral network are respectively adopted for radiation correction. The method remarkably improves the correction precision and generalization ability, supports large-area image splicing, and is suitable for quantitative application of geological exploration, environment monitoring and the like.

The invention relates to an ephemeris broadcast and time synchronization method for Beidou pseudolite deformation monitoring, and belongs to the technical field of satellite positioning. The method comprises the following steps: constructing a linearization error equation based on a pseudo-range observation value, and solving a clock error correction amount in combination with a robust iterative algorithm to improve the time synchronization precision; analyzing ephemeris parameters of the Beidou GEO satellite, calculating earth-fixed coordinates of the Beidou GEO satellite, and rotating and adapting the earth-fixed coordinates; establishing an affine transformation relationship between the pseudo-satellite coordinates and GEO ephemeris, and generating optimized pseudo-satellite ephemeris data; and a time synchronization protocol is designed, and clock skew is compensated through bidirectional timestamp interaction of the main base station and the pseudo satellite. According to the method, nanosecond synchronization of the pseudo-satellite and the real satellite is realized, the ephemeris parameter redundancy problem of the static pseudo-satellite is optimized, multi-system cooperative work is supported, and the deformation monitoring reliability and precision under the complex terrain are remarkably improved.

The invention provides a portable mobile base station data service and management method and system, and relates to the technical field of satellite navigation and high-precision positioning, and the method comprises the steps: analyzing broadcast ephemeris and clock error parameters according to an interface control file protocol; an RTCM SSR data stream is obtained; decoding the RTCM SSR data stream to obtain an SSR correction number; based on the GNSS observation value, the satellite navigation message and the SSR correction number, calculating to obtain an accurate coordinate of the base station; the convergence state of the accurate coordinates of the reference station is evaluated in real time, and parameter configuration is carried out; the GNSS observation value is packaged into an RTCM MSM4 telegraph text, and the RTCM MSM4 telegraph text and an RTCM 1005 telegraph text packaged by the accurate coordinates of the reference station are combined and coded to generate a real-time RTCM differential data stream; and according to the NTRIP protocol, the RTCM differential data stream is broadcasted to each terminal through a TCP / IP interface. According to the invention, high-precision reference station positioning and multi-terminal service are realized.

The invention discloses a real-time position obtaining method and system based on Beidou satellite positioning, and relates to the technical field of high-precision positioning, and the method comprises the steps: receiving a Beidou satellite signal, obtaining an original observation value, obtaining precise ephemeris, clock correction information and error correction parameters, carrying out the decoding and preprocessing of the obtained data, and carrying out the decoding and preprocessing of the obtained data; and carrying out position calculation according to the preprocessed data and the error correction parameters to obtain real-time position coordinates, transmitting the real-time position coordinates to a remote monitoring center, continuously updating the satellite signals and the error correction parameters, and carrying out dynamic monitoring. Through the steps of receiving Beidou satellite signals, acquiring precise ephemeris and error information, decoding and preprocessing the signals, resolving the position, dynamically monitoring and the like, high-precision and stable real-time positioning is realized, the influence of ionosphere and troposphere errors and a multi-path effect is effectively reduced, and the positioning precision and reliability are improved.

The invention discloses a multi-satellite service converged communication management control optimization method, which belongs to the technical field of satellite communication networks, and comprises the following steps: acquiring a service priority index and satellite ephemeris data, calculating the relative position between a satellite and a terminal at a future moment, and generating a satellite motion trail prediction result and an interference risk prediction result; and obtaining a load state of the satellite, dynamically calculating a resource allocation weight matrix to switch a satellite link in combination with a service priority index, a satellite motion track prediction result and an interference risk prediction result, and generating a resource allocation instruction and a switching command. According to the method, the resource allocation weight matrix is dynamically calculated by adopting the fusion service priority index, the satellite motion and interference prediction and the satellite load state, and link switching and resource allocation are performed according to the resource allocation weight matrix, so that prospective optimization management and intelligent control of multi-satellite communication resources can be realized, and the continuity and reliability of service fusion communication are improved.