source:Industry News release time:2022-07-28 Hits: Popular:realtime gps tracker online
In the GPS application, the orbit error mainly affects the positioning accuracy in the early stage, and the early GPS baseline is relatively short and the height difference is not large, so the research on the troposphere has not been paid much attention. Until recently, the tropospheric refraction has become an important obstacle limiting the improvement of GPS positioning accuracy due to the greatly improved GPS orbit accuracy. Assuming an area with basically zero elevation, if the GPS signal received by the receiver is transmitted from the zenith direction, the delay can reach the order of 2.2-2.6m, and the delay change within 2 hours can reach 2.2-2.6m. 10cm is not uncommon (so the tropospheric parameters provided by the IGS Analysis Center are used at 2-hour intervals). Also because of this fact, the tropospheric refraction is modeled taking into account the variation of its stochastic process.
In the application of GPS to troposphere research, the fast orbit and forecast orbit information of IGS will play an important role in weather forecasting. In addition, the 2-hour tropospheric zenith delay series provided by IGS through the "IGS Tropospheric Comparison and Coordination Center" at the GFZ in Germany is like a control point, which can be used as a tropospheric delay absolute for regional or local tropospheric studies. value calibration.
Different from ground-based GPS atmospheric monitoring, satellite-based or space-based GPS occultation methods have the advantages of wide coverage, good vertical resolution and fast data acquisition. The principle of this technology is to put the GPS receiver on the platform of a certain low-orbit satellite (LEO) or aircraft. GPS occultation technology acts as an atmospheric detector. The GPS/MET research project carried out in 1997 confirmed that this idea is feasible. The CHAMP satellite, scheduled for launch in April 2000, will use GPS occultation to measure global tropospheric refraction (including atmospheric precipitable fraction).
In the next few years, there will also be SAC-C in Argentina and COS-MIC in Taiwan, my country. These LEO satellites will use on-board GPS to determine the orbit and use the occultation method to measure the atmosphere.
In the future, using the meteorological and electron concentration cross-section values of the satellite-borne GPS, combined with the data of the ground GPS station, a layered image will be made for use. In the next three years, the GPS/MET project research will be carried out 6 times, and it is expected that it will make a great contribution in weather forecasting, space weather forecasting and meteorological monitoring.
Read recommendations:
simple gps tracking wholesaler
Last article:GPS application in ionospheric monitoring
Next article:GSP composition features
Related Information
gps tracker for bike Factory
2023-04-23Dog gps tracker
2023-04-234G GPS Tracker for vehicles distributors
2023-04-23GPS Tracker for vehicles Vendor
2023-03-16real-time gps tracking sales
2023-04-23gps vehicle tracker custom
2023-04-11GPS Tracker company
2023-04-11pet gps tracker cat manufacturer
2023-03-16GPS Tracking Manufacturing
2023-04-23fleet gps tracking company
2023-04-23G03
2022-06-21G500L -4G OBD GPS Tracker
2022-09-06TK08A Motorcycle GPS Tracker
2022-06-20P60L Personal gps tracker
2022-06-21TK200AM-Disposable GPS Tracker
2022-06-21GPS management system-efficient management of your vehicle
2023-02-16GPS device.obd2 gps tracker verizon manufacturer
2023-05-20GPS system architecture and analysis
2022-09-01The main function of the car GPS positioner.car gps tracker price
2023-03-08GPS Knowledge Base: What is RTK Technology
2022-08-18Gps speed limiter.The world's four major satellite positioning and navigation systems
2023-10-19Composition unit of on-board system
2022-12-09GPS positioning anti lost device comparison.gps tracker auto webfleet solutions
2023-02-24Internationally leading GPS navigator.gps tracker with magnet manufacturer
2023-08-26Where are car mounted GPS locators usually installed.mini gps tracker distributors
2023-06-25How to solve the problem of inaccurate car GPS positioner?plug & play Obd gps tracker Production
2023-03-28How to start GPS
2022-08-19What are the cases of GPS positioner?gps tracker no monthly fee manufacturer
2023-03-28DGPS Principle
2022-11-19National GPS application field
2022-12-17