validation of crimss edr products with matched ecmwf ...€¦ · raob matched data sets (divakarla...
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Validation of CrIMSS EDR Products with Matched ECMWF Analysis, RAOB Measurements, and IASI RetrievalsMurty Divakarla1, C.D. Barnet2, M. Goldberg2, D. Gu3, X. Liu4, W. Blackwell5, E. Maddy6, S. Kizer4, G. Guo6, X.L. Ma3, A. Gambocorta6, T. King6, and K.Zhang6
1I.M. Systems Group, Inc., 2NOAA/NESDIS/STAR, 3Northrop Grumman Aerospace Systems, 4LaRC/NASA , 5MIT Lincoln Labs, 6Dell Perot Systems.
Abstract: Atmospheric Vertical Temperature Profiles (AVTP), Atmospheric Vertical Moisture profiles (AVMP), and other Environmental Data Records (EDRs) retrieved by the Cross‐track Infrared Sounder and Advanced Technology Microwave Sounder Suite (CrIMSS) EDR algorithm were evaluated using matched European Center for Medium‐Range Weather Forecasts (ECMWF) analysis fields radiosonde (RAOB)Advanced Technology Microwave Sounder Suite (CrIMSS) EDR algorithm were evaluated using matched European Center for Medium‐Range Weather Forecasts (ECMWF) analysis fields, radiosonde (RAOB) measurements, and independent retrieval products from Infrared Atmospheric Sounder Interferometer (IASI) observations. The proxy CrIS and ATMS Sensor Data Records (SDRs) needed to generate CrIMSS EDR products were derived for the “Focus Day,” October 19, 2007, using IASI, Advanced Microwave Sounding Unit (AMSU), and Microwave Humidity Sounder (MHS) observations, respectively. Empirical bias tuning procedures were employed in the CrIMSS EDR algorithm to make the proxy SDRs consistent with the forward model used in the CrIMSS algorithm. The CrIMSS AVTP and AVMP products were evaluated for 42 granules of the focus day data set. Using the ECMWF/RAOB measurements as the truth, bias and RMS differences were computed for the CrIMSS and IASI EDR products. The results of the evaluation reveal that bias correction of forward model errors and sensor errors is critical to the CrIMSS algorithm performance. Evaluation of the ‘infrared plus microwave’ AVTP and AVMP retrievals reveals reasonable agreement with the ECMWF and IASI retrieval products. Further assessment of the CrIMSS EDRs with RAOBs and other correlative data sets is in progress to demonstrate launch‐readiness.
IASI, 8461Channels
stem
ALL (Ocean+Land+Coast) Cloud_Cleared AVTP- Bias (K) AVMP- Bias (%)
MSS
LaR
C V
1.5
men
tatio
n at
STA
R
zer e
t al.,
201
0)
NO
AA
-STA
RIA
SI-O
pera
tiona
l Sy s
_____ IASI (IR) -------- CrIMSS (IR+MW) _____ IASI(MW) -------- CrIMSS(MW-Only)
ALL (O+L+C) Cloud_Cleared vs. Clear AVMP RMSD (%)AVTP- RMSD (K)
CrIM
Impl
em (Kiz
cus-
Day
IASI
/AM
SU-A
/MH
S at
a Se
t (B
arne
t et a
l., 2
010)
CLDCLR _____ IASI -------- CrIMSS Clear _____ IASI -------- CrIMSS
Corresponding Author: [email protected]
B M
atch
ed D
ata
Sets
(D
ivak
arla
et a
l., 2
010a
)Fo
cD
a
Land832/1355 = 61%7/31 Clear (0 % )
Sea364/618=59%
71/99 Clear (20% )
Coast1051/1982=53%
104/138 Clear(9%)
ALL2247/3955=57%
182/317 Clear(8%)
Yield with Every Match of RAOB (RS-90,RS-80, etc.) and ALL INST. Types
Poster # 571, Seventh Annual Symposium on Future Operational Environmental Satellite Systems, 91st AMS Annual Meeting, 23‐27 January 2011, Seattle, WA.