Time and Frequency Keeping and Its Distribution System at CRL

Abstract

As a national frequency standards laboratory in Japan, Communications Research Laboratory (CRL) is doing research and development work on a primary frequency standard. Besides the primary standard, CRL is in charge of the generation of local UTC, UTC(CRL), and its time and frequency distribution via HF and LF radio signals, telephone line, and computer network. CRL contributes to TAI not only atomic clock data, but also as one of the node laboratories of the international GPS time transfer network of the BIPM. For this purpose CRL is studying the GPS ionospheric measurement system and two-way time transfer using communication satellites. In this paper we will present activities on time and frequency standards at CRL.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1996
Accession Number
ADA514770

Entities

People

  • Atsushi Otsuka
  • Kuniyasu Imamura
  • Michito Imae
  • Mizuhiko Hosokawa
  • Takao Morikawa
  • Yuko Hanado

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Satellites
  • Atomic Clocks
  • Clocks
  • Communication Satellites
  • Computer Networks
  • Digital Communications
  • Frequency
  • Frequency Bands
  • Frequency Standards
  • Global Navigation Satellite Systems
  • Measurement
  • Space Communications
  • Standards
  • Stations
  • Telephone Lines
  • Time Standards

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Tactical Satellite Communications Systems Engineering.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers