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Thomas AchtorCo-Chair International TOVS
Working Group
Jun Li and Harold WoolfUW-Madison, CIMSS
NOAA ATOVS Sounding Software for the
International Direct Broadcast Community
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International TOVS Working Group (ITWG) Activities
• ITWG– Is a sub group of the Radiation Commission within the
International Association of Meteorology and Atmospheric Physics (IAMAP)
– Serves as an International Forum for Operational and Research users of (A)TOVS and other Sounder data to exchange information and ideas and optimal use of satellite sounder data
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International TOVS Working Group (ITWG) Activities
• ITWG (continued)– Holds the International (A)TOVS Study Conferences
every 18 months– Provides recommendations to guide the directions of
future research and to influence relevant programs of WMO and other agencies (NOAA/NESDIS, NASA, EUMETSAT, JMA, CMA)
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International TOVS Working Group (ITWG) Activities
• ITWG (continued)– Through collaborations, develops and distributes
software packages for use with Direct Broadcast radiance data
• ITPP• 3I• AAPP• IAPP• ICI
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IAPPInternational ATOVSProcessing Packagev2.01
Atmospheric Variable Retrieval Softwarefor Direct Readout
from the UW-CIMSS
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IAPP Retrieval
• Developed for Direct Readout and 1-B data• AAPP Pre-processing (from Eumetsat)• Uses HIRS/3 and AMSU-A and -B
radiances as input• AMSU is remapped to HIRS/3 FOV• 3 x 3, 2 x 2, or 1 x 1 fov can be used for
retrieval• NetCDF output file
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IAPP Retrieval
• Cloud Detection and Removal • Bias Adjustment • Regression Retrieval• Non-linear, Iterative, Physical Retrieval
(Li, et al, 1999, 2000)
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IAPP Retrieval System
HIRS/3 + AMSU-A and -B radiances, calibrated, navigated,remapped to HIRS fov; 3 x 3, 2 x 2 or 1 x 1 fov input
Cloud Detection to locateClear HIRS fovs
Average HIRS, AMSU-A and -Bradiances for all clear HIRS fovs
Obtain Scattering, Rainfall and SnowCover Indices from AMSU-A
YES NO
Is AMSU-A free of precip.related contamination?
YES NO
Stop retrieval, go to Rainfall / Snow Cover Index
Average AMSU-A and -B radiancesfrom non-precipitating cloudy fovs forretrieval processing
Perform radiance bias adjustment
First Guesschoice
Initial profile from Numerical Model;Use surface data if available
Initial profile from statistical regression;Use surface data if available
Calculate Transmittances
Radiance Calculation versusObservation:
Is Residual threshold met?Output retrieval results
YESNO
Iterate - new profile
Radiance inversionfor new profile
Calculate Radiances and Weighting Functions
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IAPP Retrieval Output
• Atmospheric temperature and water
vapor mixing ratio profiles
• O3, TPWV, BLVW
• Tsk, MW sfc emissivity• HIRS/3 clear column radiances• NESDIS AMSU-A climate products
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IAPPATOVS500 hPaTemperatureRetrievalswith Radiosondes
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AMSU-A 55.5 GHz Channel Hurricane Bonnie, August 25, 1998
AMSU Temperature Retrieval Anomaly Cross Section at 29 latitude, August 28,
1998
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IAPP Contacts
• Tom Achtor (acquisition, questions)
– [email protected]• Jun Li (retrieval science)
– [email protected]• Hal Woolf (IAPP design, setup)
• http://cimss.ssec.wisc.edu/iapp
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Software Packages for Direct Broadcast Data Processing:IMAPP and Future Packages for NPP/NPOESS
H-L Allen HuangCIMSS/SSEC, University of Wisconsin-Madison
Satellite Direct Readout Conference for the AmericasMiami, Florida 9-13 December 2002
Topics:X-band System Receiving Capability
International MODIS & AIRS Processing Package - IMAPP
MODIS/AIRS Level 1 & 2 ProductsLevel 2 Processing Algorithms
Processing Packages for NPP & NPOESS
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UW-Madison X-band Receiving CapabilityTerra
Aqua
X-band Antenna
Coverage
AIRS
MODIS
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MODIS True Color Image: 2001/10/05 1610: Bahamas and Cuba
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MODIS True Color Image: 2001/11/06 1610: Bahamas and Cuba
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0.66-Red
0.87-Green
11.0-Blue
0.66-Red
0.55-Green
0.45-Blue
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Cloud Mask Product: December 12, 2000
0.66 m reflectance 1.38 m reflectance White: Cloud, Green: ClearThis complex scene over the US plains states includes snow cover at the top of the image and a mix of high and low clouds elsewhere in the image. Note the thin cirrus cloud detected only in the 1.38 m channel. The cloud mask successfully discriminates clear sky from snow in this challenging case.
Snow Cirrus
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MODIS TPW
MODIS 0.87 m
Total Precipitable Water Product: June 2, 2001
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Hurricane Lili, 2 October 2002Terra MODIS direct broadcast
TPW (mm):
MODIS total precipitable water vapor
MODIS true color image
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oK
Temperature
Pres
sure
(hPa
)
300 hPa
500 hPa
850 hPa
Isobaric Surfaces/Profiles of Temperature13 October 2002
Terra MODIS direct broadcast
true color image
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Mixing Ratio (g/kg)
Pres
sure
(hPa
)
300 hPa
500 hPa
850 hPa
Isobaric Surfaces/Profiles of Moisture13 October 2002
Terra MODIS direct broadcast
true color image
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MODIS L1B True Color (R: .67 m, G: .55 m , B: .46 m )
Low Mid High
Total Precipitable Water (mm)
Cloud Top PressureCloud Mask
Cloud Phase
IMAPP MODIS Products
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Real-time IMAPP products placed on the web and used by the USA National Weather Service as a forecasting tool.
(http://wwwghcc.msfc.nasa.gov/sport/modis_products.html)
Global Community IMAPP Applications
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Global Community IMAPP Applications
Scientists at the Plymouth Marine Laboratory in the UK are using IMAPP to provide cloud information as part of
the CLOUDMAP 2 project (18 September 2002)
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20-July-2002 Ascending LW_Window
Global AIRS Spectra: July 20, 2002
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Global AIRS Spectral Images (CO2): Sep. 6, 2002
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Global AIRS Spectral Day/Night & Boundary Layer Temperature Inversion
Sunglint-desert; clear
Sunglint-desert; clear
Sunglint-desert; clear
Land-inversion;clear
Water-inversion;clear
Land-inversion;clear
CR1
CR2
CR3
CR4
CR5
CR6
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Global AIRS Spectral Cloud, Cold Surface, & Upper Level/Boundary Layer Temperature Inversion
Snow/Ice- Inversion/South Pole
Cloud-Inversion/South Pole
Cloud;Day - Water
Cloud;Day - Land
Cloud;Night - Inversion
Cloud;Day - Desert
CD4
CD5
CD6
CD2
CD1
CD3
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Global AIRS Spectral Cloud & Upper Level Temperature Inversion
Cloud;Night - Inversion
Cloud;Day - Inversion
Cloud;Night - Inversion
Cloud;Night - Inversion
CD7
CD8
CD9
CD10
CD11
CD12
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Global AIRS Spectral Images (H2O): Sep. 6, 2002
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IMAPP software was created with these requirements:
•Portability - IMAPP software has been ported and tested on the following UNIX/PC platforms: SGI MIPS, IRIX 6.5, Sun Ultra, SunOS 5.7, IBM RS/6000, AIX 4.3, HP PA-RISC, HP-UX B.10.20, Intel Pentium Linux 2.2.12-20, Solarisx86 2.5.1
•Easy to install and use: NCSA HDF4 is the only required toolkit Required ancillary data available from anonymous ftp site: ftp://terra.ssec.wisc.edu/pub/terra/ancillary •Overpasses of arbitrary size can be processed• MODIS science data products must work using both DAAC L1B radiances and direct broadcast L1B radiances as input• Compatibility with DAAC operational versions
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MODIS IMAPP•Funded by NASA (Dr. Jim Dodge)•Fosters international compatibility and ease of use of the data
•Consists of software to turn direct broadcast MODIS and eventually AIRS data into useful science products. The current suite of MODIS products consists of:
•Calibrated, navigated 36 channel radiances (L1B)•Cloud Mask (MOD35)•Cloud Top Properties (MOD06)
Cloud top temperature/ height/emissivity/fractionCloud Phase (MOD06)•Atmospheric Profiles (MOD07):Vertical profiles of temperature and moisture at 20 levelsTotal precipitable water, Precipitable water low/highTotal column ozoneStability parameters (Lifted Index, K-Index, Total totals)
•Software is freely distributed and available via download from: http://cimss.ssec.wisc.edu/~gumley/IMAPP/
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IMAPP has been successful in providing a portable software package for converting direct broadcast MODIS data into valuable science products
CIMSS IMAPP automated processing applications: MODIS L1B and science product validation Testing of MODIS algorithm product changes Quick look display for identifying regions of spectral or meteorological interest Real-time support for field experiments
Known global community MODIS IMAPP applications: MODIS calibration validation over Lake Tahoe, USA Providing USA Weather Service forecasters with real-time high spatial resolution imagery and products Aiding the Canadian Ice Service in monitoring the amount of ice on Hudson Bay for shipping concerns Supplying cloud information from IMAPP as part of the European CLOUDMAP 2 project
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Aqua AIRS & MODIS Retrieval ExamplesJuly 20, 2002, 19:15-19:20 UTC
AIRS @ ~14 km (Nadir) MODIS @ ~1km (Nadir)
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AIRS/MODIS Co-location ExampleAIRS/MODIS Co-location Example
Nadir
Scan Angle = 23.7
Scan Angle = 49
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AIRS/MODIS Co-location ExampleAIRS/MODIS Co-location Example
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Past, Current and Future International Polar Orbiting Satellite Processing Package
ITPPITPP IAPPIAPP
INPPINPP
IMAPPIMAPP
TOVSTOVS ATOVSATOVS
MODISAIRSAMSU
MODISAIRSAMSU
NPP/NPOESSNPP/NPOESSCrISVIIRSATMSCMISOMPSOthers
NPP/NPOESSNPP/NPOESSCrISVIIRSATMSCMISOMPSOthers
ITPP-International TOVS PPIAPP-International ATOVS PP
IMAPP-International MODIS/AIRS PPINPP-International NPP/NPOESS PP
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Current and Future International Polar Orbiting Satellite Processing Package - Summary
CIMSS/UW will continue to work with government, academic, & industry partners to support package development:
•Leveraging with past & current research & operational data processing and algorithm development capability
•Adopting/adapting algorithms for efficient and accurate level 0 to level 1 data and level 1 to level 2 products demonstration
•Provide synergistic data & products processing options
•Provide regional products to support real-time applications
•Provide students, teachers, & researchers with hand-on data processing, algorithm development, and product application educational opportunity
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Countries using MODIS IMAPP
Let us know if you are using IMAPP but we don’t know yet!
http://cimss.ssec.wisc.edu/~gumley/IMAPP/