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These instruments measure visible light produced by chemical reactions in the upper atmosphere. By measuring these emissions, we can infer electron density structures in this region.

  • Dual .4deg x 4deg, 6300 Angstroms online and offline instruments

  • Simple light weight, off-the-shelf, previously flown components

  • Highest possible sensitivity given size restrictions

TESS and Photometers
Photometers Partially Assembled      Photomultiplier tubes

26 May 1999
Center for Space Physics
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