163 results about "Precise Point Positioning" patented technology

The invention relates to the technical field of inertial assistance, in particular to a Beidou high-precision space-time reference dynamic compensation system based on inertial assistance, which is characterized in that an inertial measurement unit module is used for measuring original measurement data, and the original measurement data comprises a carrier phase and a Doppler observation value; the processing unit module is used for fusing the inertial measurement unit, executing real-time environment perception and dynamic modeling, classifying an operation environment and predicting error characteristics; performing an adaptive robust fusion filtering algorithm that dynamically adjusts filter parameters and switches a filter model to estimate the position and attitude of the carrier; and in combination with radio wave precision single-point positioning enhancement service, super-tight combination signal tracking and integrity monitoring are realized, an estimated inertial assistance system state is fed back to a tracking loop of the multi-frequency Beidou receiving module, and real-time fault detection is performed on original measurement data.

The invention discloses a multi-frequency multi-mode signal multi-path error weakening method, and relates to the technical field of precision positioning, and the method comprises the steps: constructing a multi-frequency multi-mode non-combination precision single-point positioning observation equation, separating multi-path errors in pseudo-range and phase observation values through the equation, and forming residual data; performing quality control on the residual error, and eliminating an abnormal value; feature extraction and judgment are carried out based on residual data, wherein time repeatability features, spatial distribution features and trend complexity features are extracted; selecting a correction model according to a feature judgment result, wherein the correction model comprises a fixed star daily filtering model, a multi-path hemispherical graph model and a trend surface analysis multi-path hemispherical graph model; and generating a multi-path error correction amount through a selected model, correcting an original observation value, and outputting a positioning result. The method solves the problem that the positioning precision is reduced due to multi-path errors, can effectively weaken the multi-path errors, improves the positioning precision and stability, adapts to a complex environment, and reduces data processing redundancy.

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.

The invention relates to the technical field of GNSS (Global Navigation Satellite System) navigation and positioning, in particular to a GNSS real-time precise single-point positioning ambiguity fixing method for a complex environment. The method comprises the steps of obtaining and processing data, obtaining a precision satellite orbit and a precision satellite clock error from original observation data, broadcast ephemeris and an SSR correction number which are originally obtained in sequence, obtaining original frequency point non-difference floating point ambiguity, obtaining fixed integer inter-satellite single-difference wide-lane ambiguity, and obtaining floating point inter-satellite single-difference narrow-lane ambiguity. And finally, selecting the complete set ambiguity according to the precision index of the floating point narrow lane ambiguity, and carrying out iteration to obtain an ambiguity subset meeting the optimal aperture check rule. Through the method, the ambiguity fixing reliability can be further improved, and the convergence time is shortened.

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 embodiment of the invention discloses a precision positioning acceleration method and device based on a low earth orbit satellite / LSTM neural network. The method comprises the steps that a terminal obtains a wide lane phase decimal deviation product, a narrow lane phase decimal deviation product and a first GNSS combination observation value which are generated by a server based on an LSTM method and are subjected to coding processing; determining a first GNSS wide lane real number ambiguity according to the first GNSS wide lane real number Based on a precise point positioning algorithm, determining initial GNSS ionosphere elimination combination real ambiguity and other parameters; performing inter-satellite single difference on the first GNSS wide-lane real number ambiguity, and obtaining the integer ambiguity by combining wide-lane phase decimal deviation product fixation; performing inter-satellite single difference on the initial GNSS ionosphere-free combination real ambiguity, determining a first GNSS narrow-lane real ambiguity by combining the wide-lane integer ambiguity, and fixing the first GNSS narrow-lane real ambiguity by using a narrow-lane phase decimal deviation product through a partial ambiguity fixing method to obtain the integer ambiguity of the narrow-lane phase decimal deviation product; and calculating a user coordinate fixed solution in combination with related parameters.

The invention discloses a global ionosphere modeling method and device based on Beidou single-frequency ionosphere weighted PPP, and belongs to the technical field of GNSS navigation positioning and atmosphere modeling. The method comprises the following steps: acquiring real-time precise orbit and clock error information of a Beidou satellite and an initial ionospheric delay correction value; a single-frequency ionosphere weighted precision single point positioning (SF-IW-PPP) observation equation is constructed; establishing a space-time correlation constraint model of the ionized layer delay error and determining a prior variance; carrying out combined calculation by taking the previous variance as a constraint to obtain an ionosphere delay residual error, and further obtaining the total delay of the high-precision inclined ionosphere; and finally generating a global ionosphere grid model. According to the invention, high-precision and real-time global ionosphere modeling is realized by only needing a low-cost single-frequency receiver and combining Beidou real-time enhancement service, the hardware threshold and data processing delay are remarkably reduced, and the method is suitable for the fields of public navigation, intelligent transportation, space weather monitoring and the like.

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 Galileo HAS service receiving and positioning performance evaluation method and device, and belongs to the technical field of satellite positioning and navigation. The method comprises the steps that Galileo E6B frequency band signals are captured through USRP equipment, after radio frequency and direct current signals are separated through a bias device, self-adaptive layering processing is carried out through GNSS-SDR software, and the self-adaptive layering processing comprises dynamic sampling and interference suppression of a radio frequency adaptation layer, double-domain cooperative synchronization and self-adaptive decoding of a baseband intelligent processing layer and self-adaptive decoding of a baseband intelligent processing layer. And carrying out multi-dimensional feature mapping and robust verification on the HAS correction number extraction layer, and finally outputting a standardized HAS correction number. And in combination with a real-time precise single-point positioning technology, centimeter-level dynamic positioning is realized, and the positioning performance is evaluated through comparison with reference station data. According to the method, the robustness and precision of signal receiving and processing are improved, and the method is suitable for high-precision positioning requirements in a complex environment.

The invention relates to the technical field of computers, and particularly provides a time service method and device of a low-orbit satellite, electronic equipment and a storage medium. The method comprises the following steps: acquiring a digital navigation signal, and suppressing an interference spectral line of the digital navigation signal to obtain a suppressed digital navigation signal; performing amplitude-frequency compensation on the suppressed digital navigation signal to obtain a target navigation signal; correcting the pseudo-range observation model and the carrier phase observation model of the low-orbit satellite based on an error model of precise point positioning to obtain a corrected pseudo-range observation model and a corrected carrier phase observation model; and carrying out precise point positioning calculation on the corrected pseudo-range observation model, the corrected carrier phase observation model and the navigation message of the target navigation signal to obtain clock error data of the target navigation signal, and carrying out time service on a local clock according to the clock error data.

The invention relates to the technical field of positioning. The deep learning assisted satellite positioning rapid resolving method comprises the following steps: acquiring and preprocessing satellite observation data, local environment characteristic data and receiver state data to generate multi-source fusion input data; performing dynamic error prediction processing through a locally deployed deep learning model to generate a positioning error correction amount; the positioning error correction is fused to a precise single-point positioning calculation process for iterative optimization processing, and positioning coordinates meeting the requirement for regional surveying and mapping precision are generated; a local historical observation data set is combined to trigger an online learning mechanism to perform model parameter updating processing, and a self-adaptive optimization model is generated so as to dynamically adapt to ionosphere / troposphere disturbance in a local complex environment, improve the resolving convergence efficiency in a multi-path effect scene and improve the real-time performance of the multi-path effect scene. And through multi-source data coupling modeling, the technical effects of error correction and accurate adaptation of a real scene are realized.

The invention provides a navigation satellite short-term clock error forecasting method considering forecasting residual error periods, and relates to the technical field of satellite navigation. The method comprises the following steps: acquiring satellite real-time clock error data, and determining a modeling time window length and a forecast time length; performing epoch-by-epoch real-time sliding forecast on the satellite clock error by using a linear model, and subtracting the forecast clock error from the real-time clock error to obtain an error sequence; performing spectral analysis on the error sequence, and identifying main periodic terms; setting a scaling parameter related to the forecast time length, and establishing a periodic model in combination with the main periodic term fitting error sequence; in the subsequent sliding forecasting, the linear model is used for forecasting the clock error main trend, meanwhile, the periodic model is used for forecasting the residual periodic error, and the two results are added to obtain a final forecasting value. According to the method, by capturing the periodic error in the clock error, the short-term clock error forecasting precision is remarkably improved, the problems of real-time clock error service delay and data loss can be solved, and support is provided for real-time precise single-point positioning.

The invention provides a railway user terminal adaptive positioning method and system, and relates to the technical field of wireless communication networks, and the method comprises the steps: determining that a target railway user terminal currently accesses a railway Beidou application service platform through terminal account login; if yes, a real-time positioning service based on a target positioning mode corresponding to the positioning precision requirement type is provided for the terminal according to the positioning precision requirement type of the terminal so as to send real-time positioning data to the terminal, and the target positioning mode comprises a precision single-point positioning and real-time dynamic positioning mode or a real-time dynamic differential positioning mode; and providing a corresponding real-time reference conversion service for the terminal according to the reference conversion demand type of the terminal so as to send real-time reference conversion data to the terminal, so that the terminal corrects the real-time positioning data according to the real-time reference conversion data. According to the invention, a high-precision self-adaptive elastic positioning service can be provided for the railway user terminal, so that the positioning precision, the dynamic adaptability, the reliability and the effectiveness of the railway user terminal can be effectively improved.

A precision measurement and tamping operation method for an operating conventional-speed railway without a control network. The method comprises the following steps: S100, laying a temporary reference station (1) and performing initial precision track measurement; S200, processing office-processed data; and S300, performing tamping operation and precision measurement. The temporary reference station (1) is laid offline along an operation route by means of precise single-point positioning; when precision track measurement is performed by using a track inspector (2), the temporary reference station (1) may serve as a reference station and cooperate with an onboard moving station (3) to perform dynamic post-processing calculation, such that accurate coordinates of the center line of the route are obtained; and when precision tamping is performed by using a tamping vehicle (4) equipped with a tamping vehicle locator (5), the temporary reference station (1) may serve as a main reference station to provide real-time dynamic positioning for the tamping vehicle (4), thereby realizing centimeter-level mileage positioning accuracy, and realizing autonomous synchronization with field mileage.

The invention provides a troposphere delay correction method and system, electronic equipment and a storage medium, and the method comprises the steps: extracting troposphere delay of a reference station through a non-difference combination observation value method according to the obtained real-time reference station observation data, broadcast ephemeris, ultra-fast orbit and clock correction, carrying out the adjustment of observation values of a plurality of satellites, and carrying out the adjustment of the observation values of a plurality of satellites; the zenith troposphere delay of the base station is obtained; the zenith troposphere level of the base station after normalization processing is interpolated to the position of the moving station through an inverse distance weighted interpolation method, zenith troposphere delay of the moving station is obtained according to a pre-constructed elevation normalization model, and the elevation normalization model is constructed based on ERA5 horizontal atmospheric layer meteorological data. According to the method, the adaptability of the model to complex terrains can be improved, so that the model precision is improved, the precision single-point positioning convergence time of the moving station is effectively shortened, and the precision single-point positioning precision is improved.

The invention discloses an orbit determination method and device for a low-orbit satellite, the low-orbit satellite and a storage medium, and the method comprises the steps: obtaining global navigation satellite system (GNSS) observation data and broadcast ephemeris received by a receiver in the low-orbit satellite, and obtaining orbit state information in a PPP-B2b signal broadcasted by a Beidou No.3 system; preprocessing the GNSS observation data according to an observation model based on the GNSS observation data to obtain preprocessed GNSS observation data, and determining first position information of a GNSS satellite according to the broadcast ephemeris and the orbit state information; and determining orbit position information of the low-orbit satellite according to the preprocessed GNSS observation data and the first position information. Therefore, the low-orbit satellite can complete high-precision orbit positioning under the condition of limited computing power.

The invention relates to an unmanned aerial vehicle high-precision positioning method based on micro-centimeter space low-orbit constellation and Beidou PPP-B2b fusion enhancement, and the method comprises the steps: obtaining a precise orbit correction number and a precise clock correction number of a GPS and a BDS system based on a Beidou PPP-B2b signal; calculating a precise orbit and a precise clock error of the GNSS satellite based on the precise orbit correction and the precise clock error correction; on the basis of the precise orbit and the precise clock error of the GNSS satellite, an observation value of a micro-centispace low-orbit satellite is fused, and a GNSS / LEO combined PPP observation model is constructed; and based on extended Kalman filtering, precise point positioning calculation is carried out on the GNSS / LEO combined PPP observation model, and the real-time high-precision position of the unmanned aerial vehicle is obtained. According to the invention, the real-time high-precision position of the unmanned aerial vehicle can be rapidly and stably obtained, and a reliable position reference is provided for autonomous operation of the unmanned aerial vehicle in a network-free environment.

The invention provides a high-precision precise point positioning method based on BDS-3, and relates to the technical field of wireless communication. The method comprises the following steps: firstly, introducing a traditional ionosphere-free combination model to eliminate the influence of ionosphere delay on positioning precision, and eliminating or weakening a satellite orbit error and a clock error error by using satellite orbit and clock error data provided by an IGS; secondly, constructing a troposphere correction model of adaptive weighted wet delay for eliminating troposphere delay errors; thirdly, establishing a self-adaptive random model, and reasonably weighting pseudo-range and carrier phase observed quantity; and finally, estimating the parameters to be estimated through extended Kalman filtering so as to obtain a positioning calculation result. The method has obvious advantages in the aspect of improving the positioning precision, can meet the requirement of high-precision positioning, can realize centimeter-level positioning precision no matter in a dynamic mode or a static mode, and can even reach millimeter-level positioning precision in the static mode in some observation stations and directions.

The invention discloses a stability analysis method and system for a BDS / GNSS reference station of a dam slope. The invention discloses a method for analyzing stability of GNSS reference stations in a dam and a surrounding area by using a GNSS station coordinate time sequence, and belongs to the field of GNSS precision positioning and engineering monitoring interdiscipline. According to the method, stable GNSS reference stations in a reservoir area and around the reservoir area are selected, long-term observation data are processed through a precise point positioning (PPP) mode with fixed ambiguity, and a high-precision GNSS station coordinate time sequence is obtained. Then, through the steps of reference frame alignment, data preprocessing, environmental load and thermoelastic deformation elimination and the like, non-structural signal interference is eliminated, and a clean coordinate time sequence is obtained. On the basis, parameter estimation is carried out by adopting a mathematical model of linear speed + annual term + semi-annual term + jump, and the stability of the reservoir dam and the surrounding GNSS reference station is comprehensively evaluated in combination with a reservoir dam border deformation mechanism, deformation characteristics and the like.

The invention discloses a double-satellite-based real-time precise single-point positioning system combined positioning method, which synchronously receives and decodes real-time satellite orbits, clock correction and code deviation correction of PPP-B2b and HAS, and realizes real-time precise single-point positioning of a user side combined with GPS + BDS-3 + Galileo three systems through strategies such as orbital combination and clock correction optimization and switching. In the aspect of orbit correction, two satellite-based PPP orbit product references are unified through a Helmert similarity transformation model, and a combined orbit product is generated by adopting a weight adjustment strategy combining a priori fixed weight and a posterior fixed weight. In the aspect of the clock correction number, aiming at the problem that different satellite-based correction numbers are inconsistent in time reference, clock correction type consistency detection between a front epoch and a rear epoch is carried out, and ambiguity parameters of corresponding satellites are reset in time.

The invention provides a railway user location service method and system based on satellite-ground collaboration, and relates to the technical field of wireless communication networks, and the method comprises the steps: constructing a coordinate reference unified frame and a seamless positioning model for a satellite-ground collaboration system, a positioning service is provided for a server side of precise single-point positioning and real-time dynamic positioning services and a railway user side, and Beidou satellite-based precise single-point positioning service precision, space abnormal signals, orbit integrity and environmental noise corresponding to a satellite-ground cooperative system are monitored; and broadcasting the positioning fusion service data to the railway user side in real time based on the satellite-ground cooperative system, so that the railway user side optimizes self positioning data based on the positioning fusion service data. According to the invention, high-precision position service can be provided for railway users in a railway complex environment, and the railway scene positioning precision, real-time performance and reliability can be improved, so that wider railway application requirements are met.

Described herein are solutions for real-time precise ionosphere corrections. An integrate and dump (I&D) server can receive a Networked Transport of Radio Technical Commission For Maritime Services (RTCM) via Internet Protocol (NTRIP) bit stream of a spherical harmonic model for precise point positioning (PPP). The model can be a vertical total electron content (VTEC) spherical harmonic expansion model and / or can include a set of ionosphere coefficients for correcting errors in satellite signals due to ionospheric conditions. The I&D server can generate a file of ionosphere coefficients, according to a refresh timer, and can send the file to a content delivery network (CDN) for distribution to user equipment (UEs) upon request. These and many other features and examples are described herein.

The invention belongs to the technical field of positioning and navigation, and discloses a precise single-point positioning method and device based on a single Beidou, and the method comprises the steps: building a three-frequency non-difference and non-combination precise single-point positioning observation model based on a Beidou satellite system, estimating the delay of an ionized layer through a non-difference and non-combination method, and extracting the electron content in a line-of-sight direction; carrying out iterative solution on the electron content in the sight line direction by using a multiplication algebraic reconstruction algorithm to obtain the electron density of the ionized layer; taking ionosphere electron density as prior information, and adding ionosphere constraint estimation to obtain a state vector of a receiver; and calculating a signal quality evaluation coefficient of the Beidou satellite system, and according to the signal quality evaluation coefficient, updating the state vector of the receiver by using a hybrid filter to obtain a final positioning position. According to the invention, high-precision regional ionosphere delay modeling and Beidou three-frequency non-difference and non-combination precision single-point positioning under ionosphere constraint are realized, and the positioning precision and robustness of a single Beidou precision single-point positioning system are effectively improved.

The invention provides a Beidou-based antarctic ice dome elevation measurement method, and solves the problem that the traditional method cannot obtain the high-precision altitude of the antarctic ice dome. The method comprises the following steps: firstly, erecting a Beidou base station at a South Pole ice dome test point, collecting original observation data of a Beidou satellite, and calculating accurate coordinates and geodetic height of the test point through a post-event precise point positioning technology; then, determining a gravity value of a test point by using ground gravity measurement equipment, reducing the gravity value of the test point to a geoid through various corrections such as instrument null drift, earth tide and atmospheric pressure, obtaining gravity anomaly of the test point in combination with a known normal gravity value of a reference ellipsoid surface, and converting the gravity anomaly into elevation anomaly through a formula; and finally, converting the geodetic height calculated by the test point into the altitude through the conversion relation between the geodetic height and the altitude, and checking and checking the initial altitude calculated by the global gravitational field model. The method can be widely applied to the fields of South Pole scientific research, resource development and the like.

The invention provides a precise point positioning method, system, equipment and medium in an ocean scene, and belongs to the field of satellite navigation positioning, and the method comprises the steps: obtaining IGS-ZTD data and GGOS-ZTD data of different observation stations on the land, obtaining time sequence daily average deviation value data through calculation, inputting the data into a fitting model, carrying out the spherical harmonic expansion after fitting, and carrying out the precise point positioning. And obtaining a spherical harmonic function deviation model of the land area. Acquiring longitude and latitude of the ocean observation station, performing fitting calculation by using a spherical harmonic function deviation model, and introducing a dynamic order screening mechanism of a monthly scale to obtain a correction deviation value of the ocean observation station in the current month; and fitting ZTD data is obtained according to the correction deviation value. The regional limitation of a GNSS observation station is broken through, and the positioning precision of GGOS-ZTD data in an ocean region is improved by constructing a collaborative correction framework. And applying the fitted ZTD data to precise single-point positioning of an ocean scene to realize high-precision positioning of the measuring points in the ocean area.

The invention relates to a Beidou No.3 precise point positioning method based on double-frequency combination and analysis center product optimization, and belongs to the technical field of precise point positioning, and the method comprises the following steps: S1, constructing three ionosphere-free combinations B1C-B2a, B1C-B3I and B1I-B3I by using four frequency point signals B1C, B2a, B1I and B3I; s2, through comparing a root mean square value RMS of the positioning deviation, the final positioning precision and the convergence time, respectively comparing and evaluating precision point positioning PPP performance of BDS-3 in different frequency combinations under precision products issued by a plurality of analysis centers; and S3, finding out the ionosphere-free combination and analysis center product with the optimal PPP calculation performance.

The invention discloses a joint correction method and system for GNSS (Global Navigation Satellite System) non-structural deformation and a storage medium. According to the method, GNSS pseudo-range and carrier phase observation data and precise products such as a precise orbit and clock correction are obtained, a three-component displacement time sequence caused by a non-tidal atmospheric load, a non-tidal ocean load and a land hydrological load and a temperature-driven thermoelastic displacement time sequence are constructed, and the three-component displacement time sequence and the temperature-driven thermoelastic displacement time sequence are unified to a reference frame and a time system consistent with GNSS calculation. After interpolating the non-structural displacement vector to an observation epoch according to time, converting the non-structural displacement vector to a geocentric rectangular coordinate system from a site local coordinate system ENU, and projecting the non-structural displacement vector to a sight line direction from a satellite to an observation station reference point to form an equivalent geometric distance correction item; the correction terms are respectively applied to pseudo-range observation and carrier phase equivalent meter domain observation in the form of the same domain as observation, and then GNSS daily arc precise calculation is performed to output a coordinate time sequence, and preferably, the method can be used for a precise single-point positioning integer ambiguity fixing technology.

The invention provides a floater type water level wave measuring device and method, the device comprises a floater, the floater comprises a sphere and a cylinder, and the sphere and the cylinder are connected up and down; the interior of the floater is sequentially divided into three layers of cavities from top to bottom. A solar cell panel, a support, an equipment cabinet, a battery cabinet and a vertical rod are arranged in the first layer of cavity, and a Beidou No.3 short message terminal based on precise single-point positioning is arranged on the vertical rod. Rotating shafts of a first motor and a second motor are arranged in the second-layer cavity to clamp a winding drum left and right through a winding drum coupler, an anchor chain is arranged on the winding drum, one end of the anchor chain is fixed to the winding drum, and the other end of the anchor chain is connected to a sinking block; a penetrating pipe penetrating through the ball and the cylinder is arranged in the center of the third layer of cavity, and a balance weight is filled between the penetrating pipe and the side wall of the cylinder. According to the invention, three functions of positioning, observation and remote monitoring control can be realized only by relying on the Beidou satellite, the time for manually deploying and recovering the device is saved, and the deploying and recovering efficiency is improved.

The invention provides a troposphere anisotropy-considered real-time PPP positioning method, and relates to the technical field of satellite navigation and positioning, and the method comprises the following steps: S01, receiving real-time GNSS observation data, broadcast ephemeris data and precision correction data, carrying out detection and restoration of clock slip and cycle slip, data quality control and preprocessing of antenna phase correlation errors on the data to obtain a preprocessed data set; s02, calculating the solar altitude after atmospheric refraction correction according to each preprocessed data set and the geographic position and observation time of the observation station corresponding to each data set; and S03, based on the solar altitude and the satellite altitude. According to the method, solar altitude parameters are introduced, the troposphere anisotropy effect caused by solar radiation is effectively modeled, and the precision and convergence speed of real-time precise single-point positioning are remarkably improved.