Intercalibration of airglow observatories with the atmosphere explorer satellite |
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| Authors: | Marsha R Torr PB Hays BC Kennedy JCG Walker |
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| Institution: | Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109, U.S.A.;Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, U.S.A. |
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| Abstract: | The visible airglow photometer on the Atmosphere Explorer C Satellite has been used to compare the calibrations of a number of ground-based airglow observatories. Discrepancies between different ground stations as large as a factor of six have been revealed. Efforts to account for these discrepancies have resulted in the discovery of differences as large as a factor of 2 in the standard light sources in use at different observatories. The participation of additional observatories in the intercomparison of standard sources is solicited. The project has also led to the discovery of a source of error that can amount to another factor of 2 in the procedure used to calibrate many airglow instruments. In the course of the project detailed maps, based on satellite data, have been made of the galactic and zodiacal light background at a number of wavelengths, and a substantial source of contaminating emission has been discovered in the satellite data; the contamination appears to result from interaction of the spacecraft and the atmosphere at altitudes below 170 km. |
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