HCMM (AEM-1, Explorer 58), NASA's Heat Capacity Mapping Mission—the first Applications Explorer Mission. Scout D-1 from Vandenberg SLC-5 placed the 134 kg craft in sun-synchronous LEO for high-resolution thermal Earth surface surveys; operations ended September 1980.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 135 kg
- Flight
- 12th
- of 15 Scout D-1 flights
- Date and time
- 26 April 1978, 10:20 UTC
- Rocket
- Scout D-1
- Builder
- Vought
- Launch site
- Space Launch Complex 5, Vandenberg SFB, CA, USA
- Payload
- Earth Science
- International designator
- 1978-041
- Launches in 1978
- 42nd of 128
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