# Presentation: 242709

## AIRS Level 2 Processing and Distribution Plans 

- W. Wolf(1), M. Goldberg(2), C. Barnet (2),
- L. Zhou(1), and T. King(1)
- (1) QSS Group Inc, Lanham, MD, USA
-  (2) NOAA-NESDIS, Camp Springs, MD, USA

## AIRS Operations

- Fully Operational
- 24/7 Support
- Full backup system – not yet

## Current Distribution Status

- BUFR and HDF Subset Files
- AIRS Level 1B HDF-EOS Files
- Daily Global Grids

## NWP Customers

- NCEP
- DAO
- CMC
- JMA
- FNMOC
- Bureau of Meteorology Research Centre (Australia)

- UK-Met Office
- ECMWF
- Meteo-France
- DWD

## Subset Files (per day)

- BUFR radiance subset files
- 281 channels (one fov) – 240 Mb
- 324 channels (one fov) – 360 Mb
- 324 channel (nine fovs) – 1.2 Gb
- Principal components (one fov) – 720 Mb
- Reconstructed Radiances (324 ch, one fov) – 360 Mb
- AMSU only (full resolution) – 24 Mb
- HDF radiance subset file
- 281 channel (9 fovs) – 5.3 Gb

## HDF-EOS Files

- Full resolution Visible Data – 4 Gb
- CONUS AIRS Data – 10 Gb
- Every 10th AMSU Granule
- Level 0 (non HDF) – 14 Mb (compressed)
-  Level 1A – 12 Mb (compressed)
- Level 1B – 12 Mb (compressed)

## Global Grids

- All Channels (one fov) – 2.5 Gb
- All Channels (nine fov) – 1.7 Gb
- Forecast Models – 1.3 Gb
- Level 2 (Cloud Cleared and Products) – 2 Gb

## Special Cases

- Hurricanes (BUFR) – 1 Gb
- Fires (HDF-EOS) – 1 Gb
- Aerose (HDF-EOS) – 100 Gb
- Full Resolution Microwave Data since July 2002 to MIT – 62 Gb

## Distribution Numbers

- BUFR and HDF --   ~ 8 Gb / day
- HDF-EOS -- ~ 14 Gb / day
- Grids -- ~ 7 Gb / day
- Matchups -- ~ 130 Mb / day
- Special Cases -- ~ 165 Gb

## Level 2 Distribution

- Cloud Cleared Radiance in BUFR format
- Level 2 Products in BUFR format
- Matchups

## Cloud Cleared BUFR Files

- Use the same format as the Level 1B subset BUFR files
- Everything is the same except for the Quality Flag information
- Need to able to accurately quality flag the cloud cleared radiances for distribution

## Quality Flags for CC BUFR File

- 1 --  No good blackbody counts for scan line
- 2 --  No good space view counts for this line
- 3 --  No good PRTs for this line
- 4 --  Some bad blackbody view counts for this line
- 5 --  Some bad space view counts for this line
- 6 --  Some bad PRT temps on this line
- 7 --  Blackbody counts could not be smoothed
- 8 --  Spaceview counts could not be smoothed

## Quality Flags for CC BUFR File

-  9  -- Scanline was calibrated, but the moon was in the space view
- 10 --  The channel was calibrated , but there was a space view scan
- 		position error
- 11 --  The channel was calibrated, but there was a blackbody scan
- 		position error
- 12 --  The scanline was calibrated, but there was a data gap
- 13 --  Some channels were not calibrated
- 14 --  Excessive NeDT Estimate
- 15 --  Most recent calibration coefficients were used
- 16 --  The instrument was not in science mode

## Quality Flags for CC BUFR File

- 17 --  High Noise in Channel
- 18 --  Bad Telemetry
- 19 --  Pop Detected in Channel
- 20 --  Bad Gain for Channel
- 21 --  Bad Offset for Channel
- 22 --  Undesirable Channel Properties (Bad 		   	Channel)
- 23 – Reconstructed Radiance Flag
- 24 – All Set, Missing value

## Level 2 Products BUFR File

- Air Temperature (100 levels)			Rain Rate
- Layer Column Liquid Water (100 layers)		Total Water
- Layer Column Water Vapor (100 layers)		Total Ozone
- Layer Column Carbon Monoxide (100 layers)	Surface Air Temperature
- Layer Column Methane (100 layers)		Surface Skin Temperature
- Standard Air Temperature (28 levels)		Microwave Surface Class
- Water Vapor Mass Mixing Ratio (28 layers)	OLR
- Ozone Volume Mass Mixing Ratio (28 layers)	Clear OLR
- Column Averaged Carbon Dioxide		Cloud Top Pressure
- Microwave Surface Emissivity			Cloud Top Temperature
- Infrared Surface Emissivity			Cloud Infrared Emissivity
- Infrared Surface Reflectivity			Cloud Infrared Reflectivity
- Cloud Fraction				Clear Field of View Flag
- Water Vapor Saturation Mass Mixing Ration (28 layers)

## Other Products

- AMSR-E – full resolution in BUFR format.
- MODIS – spatial subset to AIRS footprints in 		BUFR format.
- AMSR-E Level 2 Product BUFR is in the works.

## Summary

- Current distribution of data is running smooth.
- Cloud Cleared radiance BUFR file is dependent upon QA Flags.
- Level 2 Product BUFR file is still being constructed.