The application of the LAMBDA method in the estimation of the GPS slant wet vapour
Abstract
By far, the technology of GPS data processing has been improved well and the accuracy of this processing has increased greatly. So, GPS has been applied in meteorology widely.The SWV (Slant Wet Vapour) is a very important parameter in the GPS meteorology. In 2004, Song Shuli had advanced a SWV estimation method which used the precision orbit of JPL, IGS clock and the LC observations without cycle-slip. But this method is bad in real-time character. LAMBDA method, which is working well in the VRS (Virtual Reference Station) /COORS, is used in the ambiguity estimation. The method was proved by some true data calculation. The ZTD(Zenith Time Delay), which is calculated by projecting SWD (Slant Wet Delay) to zenith direction, has good coherence. Compairing the ZTD with the results of GAMIT and BERNESE, the deviation between our result and the GAMIT one is commonly little than 3cm, and the BERNESE one is commonly little than 1.5cm.
- Publication:
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Acta Astronomica Sinica
- Pub Date:
- January 2009
- Bibcode:
- 2009AcASn..50...60H
- Keywords:
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- Earth;
- Atmospheric Effects