GPS Comparisons
description
Transcript of GPS Comparisons
IHOP_2002 Water Vapor Intercomparison Workshop
GPS Comparisons
John J. BraunCOSMIC Program
University Corporation for Atmospheric Research
Boulder, Colorado
IHOP_2002 Water Vapor Intercomparison Workshop
Outline
•Comparisons to Water Vapor Radiometer
•ARM radiometrics instruments
•Comparisons to Year 2001
•Comparison of GPS Processing Packages
IHOP_2002 Water Vapor Intercomparison Workshop
GPS Stations In IHOP_02 Region
NOAA/FSL and DOT Stations
OU/ARM/SuomiNet Stations
Special Stations for IHOP
41 Stations Total
HBRK
VCIO
PRCO
HKLO
LMNO
IHOP_2002 Water Vapor Intercomparison Workshop
ARM Central Facility - Lamont, OK (LMNO)
IHOP_2002 Water Vapor Intercomparison Workshop
ARM Central Facility - SuomiNet Station
IHOP_2002 Water Vapor Intercomparison Workshop
Station Hillsboro, KS (HBRK)
IHOP_2002 Water Vapor Intercomparison Workshop
Station Haskell, OK (HKLO)
IHOP_2002 Water Vapor Intercomparison Workshop
Station Purcell, OK (PRCO)
IHOP_2002 Water Vapor Intercomparison Workshop
Station Vici, OK (VCIO)
IHOP_2002 Water Vapor Intercomparison Workshop
IHOP Results Compared to YR 2001 Results
Station RMS IHOP RMS BIAS IHOP BIAS
HBRK 1.5 mm 1.5 mm -0.9 mm -0.6 mm
HKLO N/A 1.2 N/A 0.3
LMNO 1.5 1.3 -0.9 -1.1
PRCO 1.6 1.3 -1.9 -1.4
SG01 N/A 1.2 N/A -0.9
VCIO 1.3 1.5 -1.6 -0.2
IHOP_2002 Water Vapor Intercomparison Workshop
Conclusions
•GPS - WVR Comparisons have been made
•Only comparing PW results.
•There have been no quantitative comparisons of SW and tomography
•GPS tends to be dry with respect to WVR.
•GPS solutions between processing packages have not been completed yet for IHOP 2002, but previous comparisons show very good agreement.