THE SMALL ASTRONOMY SATELLITE COMMAND DATA ENCODER.

Abstract

The Small Astronomy Satellite contains a PCM command system to provide housekeeping and experiment control. To exercise this system, ground hardware was developed that encodes a partitioned computer word, or a manually inserted sequence, into the standard NASA PCM command data system format. The format used for the SAS spacecraft is a 64 bit FSK-AM signal containing leading and trailing synchronization, satellite address, intersystem decoding information, and command. Design, system operation, construction and adjustment of the ground encoder are discussed using block diagrams, timing charts, waveforms, and photographs. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1969
Accession Number
AD0696160

Entities

People

  • A. J. Pokorny

Organizations

  • Johns Hopkins University Applied Physics Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Astronomy
  • Coders
  • Coding
  • Computers
  • Construction
  • Decoding
  • Notation
  • Photographs
  • Photography
  • Sequences
  • Space Systems
  • Spacecraft
  • Spacecraft Components
  • Standards
  • Vehicles

Readers

  • Computer Science.
  • Radio communications and signal processing.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Satellites