Space-Based GPS Meteorology: GPS Radio Occultation

The Space-based GPS Meteorology is a name given to the body of science and technology, which makes use of the Global Positioning System (GPS) for active remote sensing of the Earth atmosphere. http://www.cosmic.ucar.edu/gpsmet/over/septsumm1.html/ The active limb sounding technique using radio occultation observations is taken by an orbiting GPS receiver. Using the radio occultation technique meteorological profiles (temperature or humidity) can be derived from the measured time delay of the radio signal, or resulting phase shift in the signal received from the GPS transmitter.

Useful links by GPS LEO satellites:

§	FORMOSAT-3/COSMIC		http://www.cosmic.ucar.edu
	data access:		http://cosmic-io.cosmic.ucar.edu/cdaac/index.html

§	CHAMP		http://www.gfz-potsdam.de/pb1/op/champ/index_CHAMP.html
	data access:		http://cosmic-io.cosmic.ucar.edu/cdaac/index.html
			http://genesis.jpl.nasa.gov/zope/GENESIS/Atmosphere

§	GRACE		http://www.csr.utexas.edu/grace
	data access:		http://podaac.jpl.nasa.gov/grace
			http://isdc.gfz-potsdam.de/grace

§	SAC-C		http://www.gsfc.nasa.gov/gsfc/service/gallery/fact_sheets/spacesci/sac-c.htm
	data access:		http://cosmic-io.cosmic.ucar.edu/cdaac/index.html
			http://genesis.jpl.nasa.gov/zope/GENESIS/Atmosphere

§	METOP/GRAS		http://grassaf.dmi.dk/GRAS_SAF.php
	Radio Occultation Processing Package (ROPP) (for NWP application):		http://www.metoffice.gov.uk/research/interproj/grassaf/ropp/index.html

Global Positioning Systems:

§

GPS

http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html

§

GLONASS

http://www.glonass-ianc.rsa.ru

§

GALILEO

http://www.esa.int/esaNA/galileo.html

Publications:

http://grassaf.dmi.dk/publications.php

http://genesis.jpl.nasa.gov/zope/GENESIS/Bibliography

Education:

http://www.meted.ucar.edu/COSMIC/

Some online available seminars, talks:

http://www.cosmic.ucar.edu/gpsro2/presentations.html