Optical-Recorder Design Considerations for the Canadian SEASAT - A Ground Station.

摘要

A synthetic-aperture radar will be one of the major instruments on board the SEASAT-A satellite. A recorder is to be built and installed at the Canadian ground station. Its purpose is to record the received signals as an interferogram appropriate for subsequent processing. In this note, system design considerations are given. The 19 MHz bandwidth signal is to be recorded with 2 CRT's each covering half of the 100 km swath. Two drives move film past the CRT. Specification of CRT velocity and linearity and film velocity and stability are given. The modulation transfer function required for the CRT, lens and film are given. Exposure levels are calculated and compared to sensitivities of certain films. A table summarizes the specifications. (Author)