Accession Number:

ADA011714

Title:

A Multistation Sampled Data Acquisition and Transmission System for Studies of ULF Waves.

Descriptive Note:

Scientific rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES INST OF GEOPHYSICS AND PLANETARY PHYSICS

Report Date:

1975-03-21

Pagination or Media Count:

46.0

Abstract:

The development of a multistation sampled data acquisition and transmission system designed for studying the longitudinal extent and propagation characteristics of ULF waves .001 to 2.5 Hz, observed on the earths surface, is presented. A one-error correcting Hamming code with bit interleaving among the codewords in the same transmission block is shown to provide adequate protection against the errors introduced by noise in the telephone line which serves as the communications link among the stations. The implementation of the automatic sampling of the analog magnetometers, the encoding and decoding of the data, and the generation and detection of pseudo-random sequences for synchronization, using integrated circuit technology and microprocessors is briefly described.

Subject Categories:

  • Atmospheric Physics
  • Computer Hardware
  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE