AIRBORNE SPECTRAL-RECONNAISSANCE SYSTEM VELA CLOUD GAP PROGRAM
Abstract
The nine-lens camera built as a prototype instrument for Project VELA has been redesigned and rebuilt, and is operating well. Redesigned or replaced parts in the new camera include: a stainless-steel shutter curtain; lenses individually focused for best resolution in each band; adjustable fiducial markers which allow optical registration in composite printing; new optical projection counters; a new electrical remote-control box and system console. Other improvements have been made to increase reliability and reduce maintenance. The Maurer P-220 cameras of the prototype multiband system have been replaced with Mitchell-Vinten F-95 70-mm reconnaissance cameras, which are performing more reliably. The 14L Block spectrometer has been intensively tested, and previous difficulties with this instrument have been isolated. Its unsuitability appears to be due to the nonlinear response of the light-biased cadmium selenide detector. Nonlinearities cannot be corrected by means of the present data-reduction system. The 14L spectrometer, therefore, is not recommended for further use. The spectrometers with silicon solar detectors were satisfactory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 20, 1965
- Accession Number
- AD0615434
Entities
People
- Callie Lukermann Craig
- Charles W. Hanson
- Donald H. Kelly
- Donald S. Ross
- John E. Wilson
- Thomas W. Mark