Satellite Remote Sensing at NASA Langley

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Satellite Remote Sensing at NASA Langley
Louis Nguyen1, Douglas Spangenberg2, David
Doelling2, Dung Phan2, David Duda3, William L.
Smith, Jr. 1, and Patrick Minnis1 NASA Langley
Research Center, Hampton, VA Analytical Services
Materials, Inc., Hampton, VA Hampton
University, Hampton, VA
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Overview

• McIDAS satellite data acquisition
• CERES Cloud Algorithm
• Operational Products (derived cloud properties)
• Post-launch satellite imager calibration
• Contrail Research
• Demonstrations
• McIDAS Used to Support NASA CRYSTAL-FACE Field
  Measurement Campaign
• Real-time and Historical Image Browsers

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McIDAS Satellite Data Acquisition at Langley

• GOES-8
• CONUS every 30 mins
• Full NH imagery every 1 hr
• AVHRR GAC HRPT over CONUS
• all operational NOAA satellites
• GOES-10
• Full NH imagery every 1 hr
• GMS-5
• TWP domain every 30 mins
• Coincident Satellite Data for Calibration Study
• MODIS (TERRA AQUA)
• Field Measurement Campaigns

Total 2-3 Gbytes per day
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CERES Cloud Algorithm (Minnis et al. 2002)

• Visible Infrared Solar-Infrared Split Window
  Technique (VISST) using 0.65µm 3.9µm, 10.8µm,
  12.0µm channels
• Input
• ECMWF T(z), p(z), q(z), Tskin, O3
• Spectral surface emittance map
• spectral albedo map
• elevation, vegetation type
• models of cloud reflectance emittance (re, De)
• Derived Output
• cloud amount, height, temperature, particle size,
  phase, optical depth, water path SW albedo, OLR,
  Tskin, albedo

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CERES VISST Cloud Products
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CERES VISST Cloud Products

• Real-time WEB access
• www-angler.larc.nasa.gov/armsgp
• www-angler.larc.nasa.gov/crystal movie
• Real-time ADDE server access
• Create 2-byte McIDAS AREA files of cloud products
  (14 bands with 14 different calibrations in each
  AREA file)
• New calibration module (PRD2) enables cloud
  products to be scaled from 0-32767 (16bits).
  IMGLIST, IMGPROBE, IMGDISP work with the new
  calibration
• BAR command modified to work with products
• DATALOC ADD VISST OMEGA.LARC.NASA.GOV

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ADDE Access to Cloud Products

• IMGLIST VISST/CRYSTAL FORMBAND

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ADDE Access to Cloud Products
PIMGDISP VISST/CRYSTAL BAND1
(TAU)
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ADDE Access to Cloud Products
PIMGDISP VISST/CRYSTAL BAND4
(DEFF)
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ADDE Access to Cloud Products
PIMGDISP VISST/CRYSTAL BAND10
(Z)
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ADDE Access to Cloud Products
PIMGDISP VISST/CRYSTAL BAND14
(BBSW)
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Satellite Calibration Regions
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Satellite Calibration Results
VIRS, TERRA-MODIS, ATSR-2 on-board VIS
(0.65um) calibration are within 3 (using data
from 1998-2001)
References Minnis and Nguyen, et al., JAOT, Sept
2002 Rapid Calibration of Operational and
Research Meteorological Satellite Imagers, Part
I Evaluation of Research Satellite Visible
Channel as a Reference Part II Comparison of
Infrared Channels Part III Calibration of
Geostationary and Sun-synchronous Satellites
(submitted)
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Satellite Calibration Results
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Satellite Calibration Equations
For a given satellite, the post-launch
calibration equation is L (Dg1 d Dg2 d
go) (C Co) Where L is the normalized radiance,
go is the initial gain, Dg1 and Dg2 are the 1st
and 2nd order polynomial change in the trend, d
is the day since launch, and Co is the space
count, and C is the 8 or 10-bit count (for GMS
use squared count). A solar constant (SC) of
526.9 W/m2/mm/sr is used unless otherwise noted.
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McIDAS Supports CRYSTAL-FACE Campaign

• PROVIDES
• Real-time Satellite Imagery
• Interactive Analysis Enhancements
• NEXRAD Products Overlay
• Cloud Tracking
• Multi-spectral Imagery
• Model Overlays
• Orbital Predictions
• MODIS AVHRR
• WEB Accessible

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McIDAS Weather Display
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CRYSTAL-FACE Website
McIDAS Generated Products on CRYSTAL-FACE Website
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CRYSTAL-FACE Website Demo

• Real-time Satellite Imagery
• http//www-angler.larc.nasa.gov/crystal/g8fl
  .html
• http//www-angler.larc.nasa.gov/avhrr
• Satellite Overpass Predictions for TERRA
  AQUA
• http//www-angler.larc.nasa.gov/crystal/pred
  aqua.html
• http//www-angler.larc.nasa.gov/crystal/pred
  terra.html
• Interactive Satellite Overpass Predictor
• http//www-angler.larc.nasa.gov//cgi-bin/pre
  dict/crystal.cgi
• Real-time Cloud Products
• http//www-angler.larc.nasa.gov/crystal/cldp
  rod4.html
• Aircraft Flight Track Overlays on Satellite
  Image
• http//www-angler.larc.nasa.gov/crystal/fltd
  ays/all_072902
• http//www-angler.larc.nasa.gov/crystal/fltd
  ays/all_071902
• GOES-8 VISST cloud products along aircraft
  flight legs
• http//www-angler.larc.nasa.gov/cgi-bin/crys
  tal/fltvisst.cgi

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Contrail Research
NOAA-14 IR Image on Oct 9, 2000 1645 UTC
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Contrail Research
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Summary

• McIDAS plays a critical role in our research
• McIDAS a powerful software, however
• Complexity intimidates novice users
• Software not available to everyone
• Produce Web interfaces wrapped around McIDAS
  functions
• Java applets scripts
• Communication issues limit capability
• VISST Cloud Products
• Web www-angler.larc.nasa.gov
• ADDE DATALOC ADD VISST OMEGA.LARC.NASA.GOV