OPTICAL COMMUNICATION BETWEEN A RE-ENTRY VEHICLE AND THE EARTH, PART I

Abstract

An optical communication system betwen a re-entry vehicle and the earth is analyzed to determine source spectral radiances and signal-to-noise ratios as functions of system parameters. The optical system includes an extended source, modulator, and transmitting mirror for each transmitting system, the a mosphere as a transmission medium, and a receiver mirror, filter,AND DETECTOR FOR EACH RECEIVING SYSTEM. Noise was considered to be due to radiation from the re-e try body, daylight (sunlight scattered from the atmosphere) and sunlight back-scattered from the earth; the dark currents of the ultiplier phototubes used as the detec ors are hown to be negligible. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1960
Accession Number
AD0256704

Entities

People

  • Seymour Sherman

Tags

DTIC Thesaurus Topics

  • Atmospheres
  • Communication Systems
  • Daylight
  • Detectors
  • Electromagnetic Radiation
  • Light (Electromagnetic Radiation)
  • Modulators
  • Optical Communications
  • Phototubes
  • Radiance
  • Radiation
  • Sunlight
  • Transmitting

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Optical Physics and Photonics.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.