noaa atovs sounding software for the international direct broadcast community

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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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• 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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• 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

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)

– [email protected]

• 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



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;Day - 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/

noaa atovs sounding software for the international direct broadcast community

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