BIPM Time Dept database

BIPM Time Department Data Base
Participation Laboratories Current status Geographical map Rules & guidelines Tutorials & CBKT Dissemination services	Equipments Clocks GNSS TWSTFT Source of UTC(k) PSFS	Calibrations GNSS status GNSS results TWSTFT status	Resources Graphs UTC-UTC(k) UTC and GNSS PSFS contributions Fract. deviation d Clock stats & codes Get clock code Time scales	Web services API UTC API CCL-CCTF FTP results	Home Site Map Newsletter Contact us

Complete documentation and guidelines to contribute to UTC and UTCr is available in following documents :

All CCTF-MRA guidelines

Prerequisites :

Administrative requirements for contribution to UTC (CCTF MRA guideline 6)

Technical requirements for contribution to UTC (CCTF MRA guideline 8)

Laboratory information spreadsheet

Technical recommendation for UTC(k)

>> General technical guideline <<

- Atomic clocks :

Get clock code here

Clock file format

- Time transfer :

List of recent GNSS receivers contributing to UTC and their manufacturer

Global Navigation Satellite System file format (CGGTTS format) :
GPS only (Version 1 ), GPS+GLONASS (Version 2), all GNSS (Version 2E)

LZ file format

PPP and HD file format

TWSTFT file format (ITU-R)

CGGTTS and TWSTFT Header examples

- PSFS (Primary and Secondray Frequency Standards) :

Guideline for reporting primary (PFS) or secondary (SFS) frequency standards data for TAI calibration (September 2024)

PSFS data file format (May 2020)

- Other :

Meteorological data file format (Oct.2018)

- CCTF Working Group TAI

Relevant information, membership and nomination form ( to be filled by Director of Institute)

If you have not found an answer to your question in this documentation, please contact us