Heat Capacity Mapping Mission (HCMM)Entry ID: hcmm
Abstract: The mission was the first of a series of NASA Applications Explorer Missions and is also known as AEM-A. Day/night coverage over a given area occurred at intervals ranging from 12 to 36 hours with a 16 day repeat cycle.
The satellite was operational from April 1978 to September 1980. The initial orbit of 620 km was lowered to 540 km in February of 1980. Coverage includes parts of the United ... States, Canada, Europe, Africa, and Australia. The source data was transmitted to seven ground stations and stored on binary magnetic tape. The source data on tape is no longer readable and the only remaining set of HCMM data is on black and white film. Since the data could be of historical value for global change research, the images have been scanned at 1000 dpi (25 micron) making the data accessible to the scientific community. The collection includes approximately 47,000 scenes with a Hotine Oblique Mercator projection.
The Heat Capacity Mapping Mission Radiometer operated with two channels. The first detected visible to near infrared (0.5 ? 1.1 micrometers) radiation and the second detected thermal infrared (10.5 ? 12.5 micrometers) radiation. HCMM nomenclature refers to the visible to near infrared channel as Vis and the thermal infrared channel as IR. The scenes are designated as Day-Vis, Day-IR or Night-IR.
A HCMM scene has a width of 715 km with a resolution of 500 meters for the visible channel and 600 meters for the thermal channel.
Purpose: The Heat Capacity Mapping Mission (HCMM) was an experimental satellite program directed at observing thermal conditions on the Earth?s surface during the day and at night.
Data Set Citation
Version: Not provided
Start Date: 1978-04-01Stop Date: 1980-11-01
LAND SURFACE > EROSION/SEDIMENTATION > EROSION
LAND SURFACE > LAND USE/LAND COVER > LAND USE/LAND COVER CLASSIFICATION
LAND SURFACE > LANDSCAPE > REFORESTATION
LAND SURFACE > SOILS
LAND SURFACE > SURFACE RADIATIVE PROPERTIES > ALBEDO
LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHIC EFFECTS
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS
Access Constraints None
Use Constraints There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Data Set Progress
Distribution Media: Digital
Distribution Format: Download
Role: METADATA AUTHOR
Email: lta at usgs.gov
City: Sioux Falls
Province or State: SD
Postal Code: 57198
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-06-20
Last DIF Revision Date: 2019-03-25