4 results about "Virtual Reference Station" patented technology

A GNSS landslide geological disaster monitoring and analysis method based on a virtual reference station (VRS) includes: Step 1, continuously operating reference stations determination, namely continu

This application proposes a simulation training method, system, electronic device, and storage medium, which includes: acquiring a preset geographic mapping model, fixed virtual geographic coordinates of a virtual reference station, and satellite ephemeris data; real-time acquisition of physical coordinate data fed back by the mobile platform; converting the physical coordinate data according to the geographic mapping model to obtain the virtual geographic coordinates of the mobile station; calculating the first satellite observation data using the fixed virtual geographic coordinates based on a unified time reference and precise satellite ephemeris data, and calculating the second satellite observation data using the virtual geographic coordinates of the mobile station; generating differential correction data based on the first satellite observation data; acquiring the positioning result output by the receiver of the tested mobile station; calculating the deviation index between the positioning result and the virtual geographic coordinates of the mobile station, and generating a training evaluation report.

The application discloses a CORS ionosphere modeling method and equipment based on linear variation characteristics, first, a plurality of GNSS stations in linear distribution are selected, observation data is preprocessed and STEC is calculated, and then STEC is projected into VTEC through a single layer model; then, a VTEC dataset along a target direction at the same time is constructed, IPP distance normalization is performed on the ionosphere piercing point, a VTEC reference value is calculated by calling an international reference ionosphere model as a fitting weight, a dynamic order determination strategy is adopted to complete polynomial fitting through a weighted least square method, and a regional ionosphere model is obtained. The VTEC corresponding to a virtual reference station is obtained through interpolation, ionosphere delay is obtained, and the ionosphere delay is further applied in virtual observation value calculation, and linear regional high-precision network RTK calculation is realized. The application fully utilizes the physical characteristics that the ionosphere has variation regularity in the longitude / latitude direction, relaxes the distance requirement between stations, significantly improves the accuracy of the regional ionosphere model, and further improves the observation accuracy of the linear regional network RTK.