ANALYSIS OF DOPPLER DATA FROM ECHO II,

Abstract

It is important to the design engineer to have forehand knowledge of the doppler uncertainties to be expected in a given communication environment. To obtain this knowledge accurate measurement of the doppler frequency must be obtained for comparison with precalculated doppler frequency data. Measurements were made using the Passive Satellite Research Terminal at the Floyd Test Site. Prior to these measurements, orbital element data received from Space track agencies was used to predict the expected doppler frequency as a function of time in an on-site digital computer. The computed doppler frequency was subtracted from the measured doppler frequency every second to obtain the doppler difference. The results of the data revealed that a sizeable time error existed in the computed data. This resulted in much larger doppler uncertainties than expected. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1964
Accession Number
AD0610120

Entities

People

  • Edward E. Cossette

Organizations

  • Rome Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Computers
  • Computing Devices
  • Digital Computers
  • Engineers
  • Environment
  • Frequency
  • Measurement
  • Orbital Elements
  • Terminals
  • Uncertainty

Readers

  • Computational Modeling and Simulation
  • Radar Systems Engineering.
  • Systems Analysis and Design

Technology Areas

  • Space