Active Cavity Irradiance Monitor Satellite

Mission Summary

The Active Cavity Irradiance Monitor Satellite, or AcrimSat, mission is a climate change investigation that measures changes in how much of the sun's energy reaches Earth's atmosphere. This energy, called solar irradience, creates winds, heats the land and drives ocean currents, and therefore contains significant data that climatologists can use to improve predictions of climate change and global warming.

The satellite's Active Cavity Irradiance Monitor III instrument, now in its third generation, has been used since the 1980s to study solar irradiance and its impacts on global warming. Scientists, using data from the instrument, now theorize that there is a significant correlation between solar radiation and global warming.

Mission Events

2005: AcrimSat completes its five-year primary mission and begins operating under its extended mission.

Key Discoveries

Data from the mission helps researchers formulate global climate models and study solar physics.

Scientific Instrument(s)

- Active Cavity Irradiance Monitor III (ACRIM III)

Acronym: AcrimSat
Type: Orbiter
Status: Current
Launch Date: December 20, 1999
11:13 p.m. PST (07:13 UTC)
Launch Location: Vandenberg Air Force Base, California
Target: Earth
Current Location: Orbit:
Type: Near polar, sun-synchronous

Altitude: 713 km (apogee), 672 km (perigee)
Artist's concept of AcrimSat AcrimSat Celebrates 10 Years of Measuring the Sun's Energy

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artist's concept of AcrimSat NASA's AcrimSat Solar Spacecraft Completes Five-Year Mission

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