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MODIS Airborne Simulator (MAS)
Generally available for use by NASA-funded investigators, or other government or university research projects. Routinely available to the wider community.
Use is requested via the NASA Suborbital Science Program on-line Flight Request form at: http://airbornescience.nasa.gov/sofrs
Airborne Measurements
NASA airborne multi-spectral line-scanner, with 50 spectral bands (visible through thermal infrared.) An airborne scanning spectrometer has been developed for measuring reflected solar and emitted thermal radiation in 50 narrowband channels between 0.47 and 14.2 ┬Ám.
Michael King
LASP/University of Colorado
392 UCB, Boulder CO 80309-0392
(303) 492-8099
Jeff Myers
NASA Ames Research Center
Mail Stop 244-15, Moffett Field CA
(650) 604-3598
ManufacturerJoint Daedalus Enterprises (now Argon ST Inc.), Berkely Camera Engineering, NASA Ames Research Center
Dimensions59.7 cm long, 45.7 cm wide, and 48.2 cm deep
Weight165 kg
Power Source Type28 vdc, 115-400 cps
Inlet AperturesCross-track open viewing aperture, 7
Heating/Cooling Requirementsonboard heaters
Airspeed/Altitude Requirements200 m/s, operated from 20 km altitude
Operators RequiredAutonomous operation
Ground RequirementsUnix workstation on ground to analyze and visualize data once ER-2 returns to air field.
Suitable PlatformsNASA ER-2
Data System50 channel 16-bit A/D converter with 5X over-sampling. Records to twin 18 Gb disks (mirror mode.) Ingests real-time aircraft navigation data.
Measured ParameterAt-Sensor Radiance (0.44 - 14.4 micron range), Reflected and emitted radiance; cloud optical, microphysical, and physical properties; aerosol properties
Measurement Technique4 grating spectrometers with detector arrays
Operational ModeCross-track scanner
Time Resolution6.25 Hz scan mirror
Horizontal Resolution50 m (nadir) from the nominal ER-2 altitude of 20 km
Other Resolution2.5 mrad IFOV, 86 deg. FOV
Precision16-bit digitization
Accuracy3-4% absolute radiance accuracy
Range0.44 - 14.4 microns (50 bands)
Calibration MethodTwo on-board blackbodies, integrating sphere on the ground
Limitations7 hour LN2 dewar hold-times
King, M. D., W. P. Menzel, P. S. Grant, J. S. Myers, G. T. Arnold, S. E. Platnick, L. E. Gumley, S. C. Tsay, C. C. Moeller, M. Fitzgerald, K. S. Brown and F. G. Osterwisch, 1996: Airborne scanning spectrometer for remote sensing of cloud, aerosol, water vapor and surface properties. J. Atmos. Oceanic Tech., 13, 777-794.
Flies on the NASA ER-2, in a super-pod tail cone. May be requested as an addtional instrument on most ER-2 missions (pending availalble payload space.)
6 Apr 2011 13:24