GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations

Details GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011adspr..47..886b&link_type=abstract

Advances in Space Research, Volume 47, Issue 5, p. 886-897.

Physics

Scientific paper

The German Research Centre for Geosciences (GFZ) operates a GNSS water vapour tomography system using about 350 German GNSS stations. The GNSS data processing at the GFZ works in near real-time and provides zenith total delays, integrated water vapour and slant delay data operationally. This large data set of more than 50,000 slant delays per hour is used to reconstruct spatially resolved humidity fields by means of tomographic techniques. It can be expected that additional observations from the future Galileo system provide more information with improved quality. A simulation study covering 12 h at 14 July 2009 was therefore started to estimate the impact of GPS, Galileo and GLONASS data on the GNSS tomography. It is shown that the spatial coverage of the atmosphere with slant paths is highly improved by combining observations from two or three satellite systems. Equally important for a reliable tomographic reconstruction is the distribution of slant path intersections as they are required to locate the integrated delay information. The number of intersection points can be increased by a factor of 4 or 8 if two or three systems are combined and their distribution will cover larger regions of the atmosphere. The combined data sets can be used to increase the spatiotemporal resolution of the reconstructed humidity fields up to 30 km horizontally, 300 m vertically and 15 min. The reconstruction quality could not be improved considerably using the currently available techniques.

Affiliated with

Also associated with

No associations

Rating

GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GNSS water vapour tomography - Expected improvements by combining GPS, GLONASS and Galileo observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1183570