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Shuttle Multispectral Infrared Radiometer (SMIRR)

NSSDCA ID: 1981-111A-02

Mission Name: STS 2/OSTA 1
Principal Investigator:Dr. Alexander F. H. Goetz


The purpose of the Shuttle Multispectral Infrared Radiometer (SMIRR) experiment was to determine the spectral bands to be included in a future high-resolution imaging system for mapping rocks associated with mineral deposits from space. The SMIRR system consisted of a Cassegrain telescope, a filter wheel, two Hg-Cd-Te detectors, two film cameras, and supporting electronics. The telescope was a modified version of the Mariner telescope that gathered images of Venus and Mercury in 1973. Since SMIRR was not an imaging device, photographs were necessary to locate the 100-m-diameter radiometer reading within the cameras' ground view (20 by 25 km). The two cameras, one color and one black-and-white, were aligned with the telescope. Analysis showed that the cameras remained aligned after launch stresses. The filter wheel allowed 10 filters to sample the following spectral bands: filters 1 and 2 at 0.5 and 0.6 micrometer for correlation with Landsat; filters 3 and 4 at 1.05 and 1.2 micrometers for field measurements; filter 5 at the 1.6-micrometer Landsat 4 band; filter 6 at the 2.1-micrometer NO hydroxyl absorption band; filters 7, 8 and 9 at the 2.17-, 2.20-, and 2.22-micrometer hydroxyl ion absorption bands; and filter 10 at the 2.35-micrometer carbonate absorption band. The SMIRR sampled 80,000 km of the earth's surface for 3 h and 6 min. Over 1 h of prime data was obtained over cloud-free land areas.

Alternate Names



  • Earth Science: Land Surface Processes

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Lawrence C. RowanOther InvestigatorUS Geological
Dr. Alexander F. H. GoetzPrincipal InvestigatorNASA Jet Propulsion
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