NSSDCA ID: 1996-046A-04
Mission Name: ADEOSThe Total Ozone Mapping Spectrometer (TOMS), developed by NASA/GSFC as part of the Mission to Planet Earth (MTPE), was flown on the Japanese Advanced Earth Observation Satellite (ADEOS). The TOMS instrument continued the long-term measurement of global total-column ozone begun with the TOMS instrument on Nimbus-7 launched in 1978 and the TOMS2 instrument on the Russian Meteor 3-5 spacecraft launched in 1991. The TOMS instrument was designed to measure total column atmospheric ozone, but also measured global distributions of sulphur dioxide and aerosols due to volcanic eruptions. Ozone concentrations were determined by observing the Earth's albedo at the top of the atmosphere in the ultraviolet (UV) portion of the spectrum using a UV polychromator and photomultiplier (PMT). The TOMS was a single Ebert-Fastie spectrometer with a fixed grating and an array of exit slits. The TOMS step-scanned across the orbital track 51 deg from the nadir in 3-deg steps with an FOV of approximately 0.052 rad. At each scan position, the earth radiance was monitored at six wavelengths (0.304, 0.3125, 0.325, 0.3175, 0.3326, and 0.360 microns) to infer the total ozone amount. The TOMS completed a cross scan in eight seconds, with one second for retrace, to record 37 scenes per scan. At each scene, a chopper sequentially sampled all six wavelengths four times. The TOMS used a PMT and a separate mercury-argon lamp for wavelength calibration and a depolarizer.
Mass: 20 kg
Power (avg): 22 W
Bit rate (avg): 0.5 kbps
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Jay R. Herman | Experiment Data Manager | NASA Goddard Space Flight Center | herman@tparty.gsfc.nasa.gov |
Dr. Arlin J. Krueger | Experiment Scientist | NASA Goddard Space Flight Center | krueger@chapman.gsfc.nasa.gov |
Mr. Charles E. Cote | Principal Investigator | NASA Goddard Space Flight Center | cote@carioca.gsfc.nasa.gov |