The Use of a Self-scanning Photodiode Array in Sunphotometry

Details The Use of a Self-scanning Photodiode Array in Sunphotometry The Use of a Self-scanning Photodiode Array in Sunphotometry

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991metro..28..291m&link_type=abstract

Metrologia, Volume 28, Issue 3, pp. 291-295 (1991).

Astronomy and Astrophysics

Astronomy

Scientific paper

The use of self-scanning photodiode arrays is well established for low light intensity multi-spectral measurement systems such as those used in spectroscopy and astronomy. Using the newly developed EG&G Reticon random access self-scanning linear photodiode array, an instrument has been developed for solar observations which overcomes the difficulties associated with these detectors at high light levels. By coupling this technology with flat-field concave holographic grating technology from American Holographic, a "sunphotospectrometer" has been built. This instrument is presently able to scan 1 024 channels of spectral information in less than 1 s. A prototype instrument is being tested with a second-generation version expected to fly aboard the US Space Shuttle within the next two years. The design of this instrument is described and preliminary spectra are presented to illustrate the measurement of NO2 using this portable system.

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