Calibration and postlaunch performance of the Meteor 3/TOMS instrument
- Hughes STX Corp., Greenbelt, MD (United States)
Prelaunch and postlaunch calibration results for the Meteor 3/total ozone mapping spectrometer (TOMS) instrument are presented here. Ozone amounts are retrieved from measurements of Earth albedo in the 312- to 380-nm range. The accuracy of albedo measurements is primarily tied to knowledge of the reflective properties of diffusers used in the calibrations and to the instrument`s wavelength selection. These and other important prelaunch calibrations are presented. Their estimated accuracies are within the bounds necessary to determine column ozone to better than 1%. However, postlaunch validation results indicate some prelaunch calibration uncertainties may be larger than originally estimated. Instrument calibrations have been maintained postlaunch to within a corresponding 1% error in retrieved ozone. Onboard calibrations, including wavelength monitoring and a three-diffuser solar measurement system, are described and specific results are presented. Other issues, such as the effects of orbital precession on calibration and recent chopper wheel malfunctions, are also discussed.
- Research Organization:
- National Aeronautics and Space Administration, Greenbelt, MD (United States). Goddard Space Flight Center
- OSTI ID:
- 57393
- Journal Information:
- Journal of Geophysical Research, Vol. 100, Issue D2; Other Information: PBD: Feb 1995
- Country of Publication:
- United States
- Language:
- English
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