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The Heat Capacity Mapping Mission Radiometer (HCMR), which flew
on board the Heat Capacity Mapping Mission (HCMM), collected
visible and thermal infrared day/night data which may be
useful for a variety earth science studies such as making
thermal inertia studies for the discrimination of rock types
and mineral resource location, measuring plant canopy
temperatures, observing soil temperature cycles, and mapping
natural and man-made thermal effluents. The HCMM local times
of equator crossings were 2 PM (ascending node) and 2 AM
(descending node). This provided day/night coverage about once
every 16 days at approximately 12-hour intervals depending o
latitude. The HCMM provided global coverage from 85 N to 85 S,
but due to the lack of onboard recorders, image acquisition
was limited by the availability of ground receiving
stations. Areas covered include parts of the US, western
Canada, western Europe, northern Africa, and Eastern
Australia. The spatial resolution for this data is
approximately 600 m at nadir for the IR channel (10.5-12.5
micrometers) and 500 m for the visible channel (0.5-1.1
micrometers). Specific coverage information is available from
NSSDC. HCMM radiometer image data are available in both film
(NSSDC ID 78-041A-01A) and digital (CCT) format (NSSDC ID
78-041A-01B) at a scale of 1:4,000,000. The film products are
on 241-mm rolls (totalling about 25,000 scenes), and are
available as positive or negative prints or transparencies and
contain, in addition to the actual imagery, annotation
information, a gray scale, frame identification (id),
resolution targets, registration marks and tick marks (Hotine
oblique mercator coordinates). Digital HCMM data are arranged
in a band sequential (BSQ) format. In addition, HCMM images
are available as day/night registered imagery in both film
(NSSDC ID 78-041A-01C) and digital format (NSSDC ID
78-041A-01D) also with a scale of 1:4,000,000. These day/night
registered data consist of five types of images: visible, day
thermal infrared, night thermal infrared, the temperature
difference, and the apparent thermal inertia. Day/night
registered data also contain a 16 step gray scale, time and
location annotation, geometric correction information,
etc.,. All HCMM data are available from the NSSDC. HCMM data
acquired at Lannion, France, may also be ordered from ESA
Earthnet User Services.
References:
Kahle, A.B., J.P. Schieldge, M.J.Abrams, R.E. Alley, and
C.J. LeVine, Geologic Applications of thermal inertia imaging
using HCMM data. JPL Publication 81-55, Pasadena, CA,
1981. Price, J.C., Heat Capacity Mapping Mission (HCMM) data
users handbook for Applications Explorer Mission (AEM),
NASA/GSFC, Greenbelt, MD, 1980 (Available from NSSDC). Short,
Nicholas M. and Locke Stuart, 'The Heat Capacity Mapping
Mission (HCMM) Anthology', NASA SP-465, 1982.
Additional information available at
"http://ceos.neonet.nl/metadata/dif/78-041A-01A.xml"
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