Coordinated Measurements of Ionospheric Irregularities: Digital Photometer Design and Development.
LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF PALO ALTO RESEARCH LAB
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A photometer system has been designed which incorporates the concepts of modularity and fully digitized control and data recording electronics. Modularity allows field substitution of background subtraction techniques, filter choice, and choice of input optical configuration. Novel features include a trichroic filtering module which allows simultaneous monitoring of auroral or airglow emission intensities in three spectral regions with the same field of view and input optics. Also described is a novel three beam adaptation which allows monitoring of the emission intensity from three closely spaced regions in the upper atmosphere in the same spectral region. The digital counting and control electronics described are compatible with NIMBIN plug in modules and allow expansion of the system to many photon counting channels as well as ready interfacing with other data sources. Author
- Atmospheric Physics