ACRIM-III

Active Cavity Radiometer Irradiance Monitoring - III

Satellites

SMM (ACRIM-I), UARS (ACRIM-2), ACRIMSat (ACRIM-III)

Status

Operational – Utilised from 1980 until ~ 2012

Mission

Total solar irradiance monitoring

Instrument type

Assemblage of 3 active cavity radiometers, spectral range 0.2 - 2.0 µm

Scanning technique

Sun pointing during orbital movement, data sampled each 2 min

Coverage/cycle

One measurement after integration on all data taken during the diurnal orbit arc; thus 100 min

Resolution (s.s.p.)

N/A (sun pointing)

Resources

Mass: 13 kg - Power: 10 W - Data rate: 600 bps