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MODIS Airborne Simulator (MAS)


Winter Cloud Experiment
Dates: 23 January - 13 February 1997
Location: Upper Midwest, Great Lakes, New England, & Canada
Principal Investigators: Dr. Paul Menzel (UWisc)
Additional Sensors: Camera (RC-10), CPL, NAST-I, & S-HIS
Objective: This campaign was designed to improve remote detection of clouds
over snow and ice fields, in addition to snow and ice fields through clear skies.

Processing Information
Flights Processed: 10 of 10
Total Flight Tracks:
Total Scanlines:
Level-1B Version: #2
Calibration Type: Final
Calibration Version: WINCE ARC 1.0
Temperature Adjustment: None
Status: Level-1B Data in HDF format is available

Noted Irregularities

Spectral Information
Spectral Band Configuration
Spectral Response Function Table

Level-1B Data Distribution
Level 1 / Atmosphere Archive and Distribution System (LAADS)
NASA Distributive Active Archive Centers (DAACs)

WINCE Missions
Click on a Track Map to view a particular mission
January 1997
28 Jan 1997
Flight: 97-041
29 Jan 1997
Flight: 97-042
30 Jan 1997
Flight: 97-043
February 1997
02 Feb 1997
Flight: 97-044
06 Feb 1997
Flight: 97-045
08 Feb 1997
Flight: 97-046
09 Feb 1997
Flight: 97-047
10 Feb 1997
Flight: 97-048
12 Feb 1997
Flight: 97-049
13 Feb 1997
Flight: 97-050
Related Web Sites
Official WINCE Home Page
CPL Home Page
NAST-I Home Page
S-HIS Home Page
NASA Airborne Science Program

Noted Irregularities
  • When the plane comes out of a steep roll into a straight and level flight track it may take several seconds for the MAS instrument to fully stabilize. This could cause some smearing of data at the very beginning of a few flight lines, generally affecting the first 20 scanlines or so. (EXAMPLE)
  • First sample in almost all flights is corrupted. It is believed that this was caused by a faulty DDX board. The problem was rectified after the WINCE deployment. (EXAMPLE)
  • During many flights there was a loss of LN2 pressure in the port 4 dewar. Occassionally this problem was evident in the port 3 dewar as well. This results in rather noisy IR and thermal IR data in many flightlines.
  • Many flights showed pronounced and excessive 400 Htz noise patterns in the data sets. (EXAMPLE 1) (EXAMPLE 2)
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Sample Imagery
Click image for full resolution
Flight: 97-047, Track #03
Lake Erie, New York
Click to load the full resolution image Flight: Direction Indicator
R: 2.15µm
G: 0.95µm
B: 0.65µm