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NOAA-18 Instrument Calibration and Validation Briefing . NOAA/NESDIS/Office of Research and Applications As of the Week of June 27, 2005 For archived activities and latest news, please visit http://www.orbit.nesdis.noaa.gov/smcd/spb/n18calval. Weekly Highlights (June 27-July1). HIRS
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NOAA/NESDIS/Office of Research and Applications
As of the Week of June 27, 2005
For archived activities and latest news, please visit
We focus on these instruments:
Fuzhong Weng: ORA/SMCD/Sensor Physics Branch Chief and NOAA-18 cal/val team leader, instrument asymmetry and microwave products and algorithms, radiance bias assessments for NWP model applications
Changyong Cao: HIRS instrument calibration
Fred Wu: AVHRR VIS/IR instrument calibration
Tsan Mo: AMSU/MHS instrument calibration
Jerry Sullivan: AVHRR thermal channel calibration/ NDVI validation
Tony Reale: HIRS/AMSU/MHS sounding channel/products validation
Mike Chalfant: HIRS/AMSU/MHS sounding channel/products validation /geolocation
Ralph Ferraro: AMSU/MHS window channels/MSPPS products validation
Larry Flynn: SBUV product validation
Tom Kleespies: AMSU on-orbit verification
Hank Drahos: Sounding product validation
Dan Tarpley: AVHRR product NDVI monitoring
John LeMashall: Impacts assessments of NOAA-18 data for NWP applicationsOur Team
56 samples for all 12 channels
Space dwell data 300 scanlines, June 9, 2005
Unexpected correlation between ch1 and ch11
dVch = Vch – V0,
Where dVch = delta volt for a channel
Vch = volt for a channel
ch = 1, 2, 3, 4, 11, 7, 8, 10, 6, 5, 12, 9 (in order)
V0 = value for the clamp target, which is set once for each cycle (every 0.1 sec, or one rotation of the filterwheel).
HIRS filterwheel (inner ring for LW channels)
Note: ch 11 is weakly correlated with both groups
Ex: ch 2 vs. ch5
Ch2 vs. ch5 correlation disappeared
Ex: ch6 vs. ch5
Shown are the NOAA-18 AMSU-A window channel asymmetry characterized by the differencesbetween observed and simulated brightness temperatures. NOAA-18 AMSU-A1 module displays much
larger cross-track asymmetry than previous AMSU-A1 and will impact sounding products.