NTRS - NASA Technical Reports Server

Back to Results
Time scale algorithm: Definition of ensemble time and possible uses of the Kalman filterThe comparative study of two time scale algorithms, devised to satisfy different but related requirements, is presented. They are ALGOS(BIPM), producing the international reference TAI at the Bureau International des Poids et Mesures, and AT1(NIST), generating the real-time time scale AT1 at the National Institute of Standards and Technology. In each case, the time scale is a weighted average of clock readings, but the weight determination and the frequency prediction are different because they are adapted to different purposes. The possibility of using a mathematical tool, such as the Kalman filter, together with the definition of the time scale as a weighted average, is also analyzed. Results obtained by simulation are presented.
Document ID
Document Type
Conference Paper
Tavella, Patrizia
(Istituto Elettrotecnico Nazionale (Galileo Ferraris) Turin (Itlay)., United States)
Thomas, Claudine
(Bureau International des Poids et Mesures Sevres, France)
Date Acquired
September 6, 2013
Publication Date
May 1, 1990
Publication Information
Publication: JPL, The 22nd Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting
Subject Category
Physics (General)
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available