GPS Comparisons

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GPS Comparisons. John J. Braun COSMIC Program University Corporation for Atmospheric Research Boulder, Colorado. Outline. Comparisons to Water Vapor Radiometer ARM radiometrics instruments Comparisons to Year 2001 Comparison of GPS Processing Packages. NOAA/FSL and DOT Stations. - PowerPoint PPT Presentation

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PowerPoint PresentationGPS Comparisons
Boulder, Colorado
Outline
ARM radiometrics instruments
41 Stations Total
Special Stations for IHOP
Map of Central United States. GPS stations used in IHOP are shown.
IHOP_2002 Water Vapor Intercomparison Workshop
ARM Central Facility - Lamont, OK (LMNO)
Lamont, Oklahoma PWV compared to ARM Central Facility MWR.
IHOP_2002 Water Vapor Intercomparison Workshop
ARM Central Facility - SuomiNet Station
SG01 SuomiNet station compared to ARM Central Facility MWR. SGO1 is collocated with MWR. Both instruments are about 8 km south of LMNO station
IHOP_2002 Water Vapor Intercomparison Workshop
Station Hillsboro, KS (HBRK)
Homestead Slant Wate Vapor (right) on day when dryline formed and oscillated over Homestead site. Refractivity measurements from SPOL radar are shown on the left.
IHOP_2002 Water Vapor Intercomparison Workshop
Station Haskell, OK (HKLO)
Homestead Slant Wate Vapor (right) on day when dryline formed and oscillated over Homestead site. Refractivity measurements from SPOL radar are shown on the left.
IHOP_2002 Water Vapor Intercomparison Workshop
Station Purcell, OK (PRCO)
Homestead Slant Wate Vapor (right) on day when dryline formed and oscillated over Homestead site. Refractivity measurements from SPOL radar are shown on the left.
IHOP_2002 Water Vapor Intercomparison Workshop
Station Vici, OK (VCIO)
Homestead Slant Wate Vapor (right) on day when dryline formed and oscillated over Homestead site. Refractivity measurements from SPOL radar are shown on the left.
IHOP_2002 Water Vapor Intercomparison Workshop
IHOP Results Compared to YR 2001 Results
Station
RMS
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
Statistics comparing IHOP results to statistics from all of 2001. Trends in IHOP are similar to yearly trends.
IHOP_2002 Water Vapor Intercomparison Workshop
Conclusions
Only comparing PW results.
There have been no quantitative comparisons of SW and tomography
GPS tends to be dry with respect to WVR.