ATMOSPHERIC WATER VAPOUR DETERMINATION BY THE INTEGRATION OF INSAR AND GNSS OBSERVATIONS

摘要

High spatial and temporal variations of atmosphericwater vapour cause an unknown delay on microwavesignals emitted from space-borne transmitters. Thisdelay is considered as a major error source inInterferometric Synthetic Aperture Radar (InSAR)applications as well as high-precision applications of theGlobal Navigation Satellite Systems (GNSS). Temporalvariability of water vapour is estimated directly with ahigh temporal resolution from GNSS measurements. Onthe other hand, InSAR can provide information aboutthe spatial variations of atmospheric water vapour. Themain goal of this project is to integrate InSAR phaseobservations and GNSS measurements collected fromsites distributed within the SAR image to derive highspatially-resolved maps of atmospheric water vapour. Inthis contribution research progress and first results arepresented.