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Examples of Atmospheric Applications of Terra MODIS at the University of Wisconsin-Madison

Examples of Atmospheric Applications of Terra MODIS at the University of Wisconsin-Madison. Cooperative Institute for Meteorological Satellite Studies http://cimss.ssec.wisc.edu. Cooperative Institute for Meteorological Satellite Studies. MODIS atmospheric investigations at UW

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Examples of Atmospheric Applications of Terra MODIS at the University of Wisconsin-Madison

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  1. Examples of Atmospheric Applications of Terra MODIS at the University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies http://cimss.ssec.wisc.edu Cooperative Institute for Meteorological Satellite Studies

  2. MODIS atmospheric investigations at UW (global products generated on the UW SCF) 1 km water vapor multi-spectral cloud mask cloud heights with CO2 slicing cloud phase with tri-spectral window atmospheric temperatures Total Column Water Vapor Total column Ozone comparisons are made with GOES and AMSU/HIRS UW MODIS QA web site http://cimss.ssec.wisc.edu/modis1/modis1.html Progress on Direct Broadcast International MODIS/AIRS Processing Package

  3. MODIS 1 km resolution reveals fine-scale structure

  4. Cloud Mask Objective: For every 1000 m pixel, determine whether the field of view is obstructed (usually by cloud). Operate day and night globally. Method: Combination of spectral tests using visible, near-infrared, and infrared bands. Fuzzy thresholds are used. Result Categories: Confident Clear, Probably Clear, Uncertain, Cloudy. Ackerman, S. A. et al. 1998: Discriminating clear sky from clouds with MODIS. J. Geophys. Res., 103, 32141-32157.

  5. MODIS 2000/09/05-08 Band 1 (0.66 µm) Daytime Clear sky Reflectance

  6. MODIS 2000/09/05-08 Band 31 (11.0 µm) Daytime Clear sky Brightness Temperature

  7. MODIS 2000/09/05-08 Band 1, 4, 3 (R/G/B) Daytime Clear sky Reflectance Composite

  8. Atmospheric Profiles Objective: Retrieve profiles of atmospheric temperature and water vapor for every 5 x 5 box of 1000 m FOVs where at least 5 FOVs are clear. Also retrieve total column ozone. Method: Statistical regression retrieval (for efficiency at launch). Physical simultaneous retrieval (post launch). Products: Temperature and water vapor at 20 atmospheric levels (sampled from 101). Total column ozone and precipitable water. Li, J. and H. L. Huang, 1999: Retrieval of atmospheric profiles from satellite sounder measurements using discrepancy principle. Appl. Opt., 38, 916-923.

  9. GOES vs. MODIS 2000/06/30 1600 UTC Total Ozone (Dobsons)

  10. MODIS 2000/09/05-08 Daytime Total Ozone (Dobson Units)

  11. Earth Probe TOMS 2000/09/05 Total Ozone (Dobson Units)

  12. GOES vs. MODIS 2000/06/30 1600 UTC Total Precipitable Water (mm)

  13. MODIS 2000/09/05-08 Daytime Total Precipitable Water (cm) values over land not shown to facilitate comparison with AMSU

  14. NOAA-15 AMSU-A 2000/09/05 Daytime Total Precipitable Water (mm)

  15. MODIS 2000/09/05-08 Daytime 850 hPa Temperature (K)

  16. NOAA-15 AMSU-A 2000/09/05 Daytime 850 hPa Temperature (K)

  17. MODIS 2000/08/23 500 hPa Temperature (K)

  18. NOAA-15 AMSU-A 2000/08/23 500 hPa Temperature (K)

  19. Cloud Top Properties Objective: Retrieve cloud top properties for every 5 x 5 box of 1000 m FOVs where at least 5 FOVs are cloudy. Method: Longwave infrared CO2 slicing; tri-spectral for cloud phase. Products: Cloud top pressure and temperature; Cloud fraction and effective emissivity; Cloud phase (water, ice, mixed). Frey, R. A. et al, 1999: A comparison of cloud top heights computed from airborne lidar and MAS radiance data. J. Geophys. Res., 104, 24547-24555.

  20. MODIS 2000/03/12 1730 UTC Cloud Mask snow Clear=green, cloud=white, uncertain=red

  21. MODIS 2000/03/12 1730 UTC Cloud Top Pressure

  22. MODIS 2000/09/05-08 Cloud top Pressure Cloud top Temperature Cloud Fraction Cloud Effective Emissivity

  23. MODIS 2000/09/05-08 Percentage Water Cloud

  24. MODIS 2000/09/05-08 Percentage Ice Cloud

  25. International MODIS/AIRS Processing Package • Goal: • Transform direct broadcast Level-0 data (initially from MODIS) to calibrated & geolocated radiances (Level-1B). • IMAPP Features: • Ported to a range of platforms (IRIX, SunOS, AIX, HPUX, Linux), • Only tool kit required is NCSA HDF 4.1r3, • Processing environment is greatly simplified, • Downlinked or definitive ephemeris/attitude data may be used, • Passes of arbitrary size may be processed, • Available at no cost; licensed under GNU GPL. • Available from: • http://cimss.ssec.wisc.edu/~gumley/IMAPP/IMAPP.html

  26. EOS Direct Broadcast Groundstation TeraScan SX-EOS 4.4 m antenna: First data acquired 2000/08/18 Overpass prediction 2000/10/13

  27. MODIS Band 2: 250 meter resolution UW-Madison Direct Broadcast 2000/10/13 1559 UTC

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