Radio occultation data processing at the COSMIC Data Analysis and Archival Center (CDAAC) [presentation]
Schreiner, W., Hunt, D., Rocken, C., & Sokolovskiy, S. (2002). Radio occultation data processing at the COSMIC Data Analysis and Archival Center (CDAAC) [presentation]. In 1st CHAMP Science Meeting. Jet Propulsion Laboratory: Potsdam, DE.
The UCAR CDAAC has analyzed radio occultation data from the GPS/MET, CHAMP, and SAC-C missions. Approximately 45 % of all CHAMP and SAC-C radio occultation profiles reach below 1 km altitude, compared to only 35 % for GPS/MET. All missions exhibit a negative refractivity bias in the lower troposp... Show moreThe UCAR CDAAC has analyzed radio occultation data from the GPS/MET, CHAMP, and SAC-C missions. Approximately 45 % of all CHAMP and SAC-C radio occultation profiles reach below 1 km altitude, compared to only 35 % for GPS/MET. All missions exhibit a negative refractivity bias in the lower troposphere of nearly 1 % compared to NWP models. When constrained to the tropics, the CHAMP data show a negative refractivity bias of approximately 1.7 %, and only 20 % of occultation profiles reach 1 km. Current CDAAC LEO orbit determination for CHAMP agrees with JPL orbits at the 30 cm 3D root mean square level, which can result in temperature errors of about 0.3 degrees K at 30 km altitude. Show less
