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Progress in Community Radiative Transfer Model for Satellite Radiance Assimilation Quanhua (Mark) Liu 1,2 , Paul van Delst 1,3 , Ming Chen 1 , David Groff 1,3 , Yong Chen 2 , Andrew Collard 3 , Sid-Ahmed Boukabara 1 , Fuzhong Weng 4 , John Derber 3
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Progress in Community Radiative Transfer Model for Satellite Radiance Assimilation
Quanhua (Mark) Liu1,2, Paul van Delst1,3, Ming Chen1, David Groff1,3,Yong Chen2, Andrew Collard3, Sid-Ahmed Boukabara1, Fuzhong Weng4, John Derber3
1 Joint Center for Satellite Data Assimilation; 2 ESSIC, University of Maryland, College Park, MD
3 NOAA/NCEP; 4 NOAA/NESDIS Center for Satellite Applications and Research;
The Community Radiative Transfer Model (CRTM), developed at the Joint Center for Satellite Data Assimilation, has been applied to the NOAA/NWS operational radiance assimilation in supporting of daily weather forecasting, to the NOAA Microwave Integrated Retrieval System for operational satellite products, and to international remote sensing community for remote sensing sensor calibration, air quality application, and others including projects at CICS/ESSIC.
The latest CRTM version 2.1.3, which is applicable for passive microwave, infrared and visible sensors. It supports all NOAA satellite instruments, NASA MODIS, and many foreign meteorological satellites.
6. Surface Emissivity and Reflectance
Joint Center for Satellite Data Assimilation (JCSDA) Partner Organizations
Using the CRTM IR BRDF model, simulations
over oceans agree with measurements.
7.1 Stratosphere Sounding Unit(SSU)
SSU mission was started onboard TIROS-N in October 1978 ended onboard NOAA-14 in 2007.
Using the CRTM, we removed the effects of atmospheric and cell CO2 for a long-term data record of stratospheric temperatures.
SSU showed that stratospheric temperatures may gradually recovered after 1996.
Microwave sound unit (MSU) data supported the finding.
Liu, Q., and F. Weng, 2009: Recent stratospheric temperature observed from satellite measurements, SOLA, 5, 53-56, doi:10.2151/sola.2009-014.
Support more than 100 Sensors
TIROS-N to NOAA-19 AVHRR
TIROS-N to NOAA-19 HIRS
GOES-8 to 14 Imager
GOES-8 to 14 sounder
Aqua AIRS, AMSR-E, AMSU-A, HSB
NOAA-15 to 19 AMSU-A
NOAA-15 to 17 AMSU-B
NOAA-18, 19 MHS
TIROS-N to NOAA-14 MSU,
DMSP F13 to 15 SSM/I
DMSP F13,15 SSM/T1
DMSP F14,15 SSM/T2
DMSP F16-20 SSMIS
TiROS to NOAA-14 SSU
METOP-A IASI AMSUA, MHS, HIRS, AVHRR
FY-3 IRAS, MWTS, MWHS, MWRI
AMSR2, AMSR-E, TMI
7.2 Monitoring Sensor Performance
Using the CRTM simulation, we identified that VIIRS M12 image striping over oceans at daytime was caused by the difference among 16 detectors.
Liu, Q., C. Cao, and F. Weng, 2013: Striping in the Suomi NPP VIIRS Thermal Bands through Anisotropic Surface Reflection, J. Atmos. Oceanic. Technol., 30, 2478–2487. doi: http://dx.doi.org/10.1175/JTECH-D-13-00054.1
CRTM main modules
Strong absorption above 20 hPa for
NOAA-16 because of out-of-band.
4.1 Transmittance Model
7.3 SSMIS Radiance Assimilation for Hurricane Prediction
The SSMIS measures radiances in 24 channels covering a wide range of frequencies (19 – 183 GHz) conical scan geometry at an earth incidence angle of 53 degrees maintains uniform spatial resolution, across the entire swath of 1700 km.
CRTM simulated IASI, AIRS and CrIS spectrum
4.2 Specific Transmittance Model
The O2 transition line is split into many sublines, which can change transmittance.
5. Aerosol and Cloud Models
Global Model, GOCART
Dust, Sea Salt, Organic carbon,
Black carbon, Sulfate
CMAQ is under implementation.
Aerosol are assumed to be spherical particles. Spheroid shape for dust is under consideration.
Liquid, Rain, Snow, Ice, Graupel, and Hail
Non-spherical particles for ice cloud are used for Visible and IR bands.
Impact studies. Control the operational result; Test using SSMIS radiance
assimilations. Liu and Weng, 2006: GRL, V33, L22811.
Satellite information contents:
SSMIS brightness temperature varies as
Hurricane developed and degraded.
Liu and Weng, 2006: GRL,V33, L06817
CRTM 2.1 Release
Ding, et al. TAMU
CRTM 2.1.3 release is available from ftp.emc.ncep.noaa.gov