Open AccessCombined forecast impact of GRACE‐A and CHAMP GPS radio occultation bending angle profiles
Author(s) -
Healy S. B.,
Wickert J.,
Michalak G.,
Schmidt T.,
Beyerle G.
Publication year - 2007
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.149
Subject(s) - radio occultation , global positioning system , standard deviation , geodesy , environmental science , occultation , bending , atmospheric sciences , elevation angle , meteorology , remote sensing , geology , physics , mathematics , optics , telecommunications , astronomy , azimuth , computer science , statistics , thermodynamics
Impact experiments assimilating GRACE‐A and CHAMP GPS radio occultation (GPSRO) bending angle profiles are presented. The standard deviation of the observation minus background bending angle departures above 35‐km is 30% smaller for GRACE‐A than CHAMP, indicating that the GRACE‐A measurements are more accurate. Assimilating the GPSRO measurements improves stratospheric temperatures in the Southern Hemisphere. The combined impact of GRACE‐A and CHAMP is greater than assimilating either instrument individually. Copyright © 2007 Royal Meteorological Society