####################################################################################################################################################### # BIPM Time Department, 13/02/2019 # # # # Description of archives from BIPM Time Department Annual Report Tables # # Complete annual reports can be accessed at : https://www.bipm.org/en/bipm-services/timescales/time-ftp/annual-reports.html # # # ####################################################################################################################################################### In the following tables, YY means the last two-digits of the year and MM means the number of the month. Past BIPM Time Department Annual report tables can be found at the following locations: ---------------------------------------------------------------------------------------------------------------------------------------------------- TABLES FROM PAST ANNUAL REPORTS | PERIOD | LOCATION ---------------------------------------------------------------------------------------------------------------------------------------------------- Until december 2016: | | | | - Difference between the normalized frequencies of EAL and TAI | 1993-2016 | ftp://ftp2.bipm.org/pub/tai/scale/EALTAI/ealtaiYY.ar Replaced by the monthly updated table | 1977- | ftp://ftp2.bipm.org/pub/tai/other-products/ealtai/feal-ftai - Frequency drifts of clocks contributing to TAI | 2012-2016 | ftp://ftp2.bipm.org/pub/tai/scale/DTAI/dtaiYY.ar Replaced by the monthly updated table | 2012- | ftp://ftp2.bipm.org/pub/tai/other-products/clkdrifts/dYY.MM - Rates of clocks contributing to TAI | 1993-2016 | ftp://ftp2.bipm.org/pub/tai/scale/RTAI/rtaiYY.ar Replaced by the monthly updated table | 1998- | ftp://ftp2.bipm.org/pub/tai/other-products/rates/rYY.MM - Weights of clocks contributing to TAI | 1993-2016 | ftp://ftp2.bipm.org/pub/tai/scale/WTAI/wtaiYY.ar Replaced by the monthly updated table | 1998- | ftp://ftp2.bipm.org/pub/tai/other-products/weights/wYY.MM | | ---------------------------------------------------------------------------------------------------------------------------------------------------- Until december 2015: | | | | - [TAI - GPS time] and [UTC - GPS time], | | [TAI - GLONASS time] and [UTC - GLONASS time] | 2003-2015 | ftp://ftp2.bipm.org/pub/tai/scale/UTCGPSGLO/utcgpsgloYY.ar | | ---------------------------------------------------------------------------------------------------------------------------------------------------- Before 2003: | | | | - [TAI - GPS time] and [UTC - GPS time] | 1993-2003 | ftp://ftp2.bipm.org/pub/tai/scale/UTCGPS/utcgpsYY.ar - [TAI - GLONASS time] and [UTC - GLONASS time] | 1993-2003 | ftp://ftp2.bipm.org/pub/tai/scale/UTCGLO/utcgloYY.ar - Local representation of UTC: values of [UTC - UTC(lab)] | 1993-1998 | ftp://ftp2.bipm.org/pub/tai/scale/UTCXY/utcYY.ar - Independent local atomic time scales: local values of [TAI - TA(lab)] | 1993-1998 | ftp://ftp2.bipm.org/pub/tai/scale/TAI/taiYY.ar - TAI frequency | 1993-1994 | ftp://ftp2.bipm.org/pub/tai/scale/FTAI/ftaiYY.ar - Local representations of UTC: Values of [UTC - UTC(lab)] | 1990-1992 | ftp://ftp2.bipm.org/pub/tai/scale/UTC/utc.YY - Local values of [TAI - TA(lab)] | 1982-1992 | ftp://ftp2.bipm.org/pub/tai/scale/TA/ta.92 | | ---------------------------------------------------------------------------------------------------------------------------------------------------- Starting with the BIPM Time Section Annual Report for 1999, some tables traditionally included in the printed version are only available in electronic form. At present, the Annual Report includes the following tables: - Frequency offsets and step adjustments of UTC - Relationship between TAI and UTC - Acronyms and locations of the timing centres which maintain a UTC(k) and/or TA(k) - Equipment and source of UTC(k) of the laboratories contributing to TAI - Corrections for homogeneous use of the clock rates published in the current and previous annual reports - Statistical data on the weights of the clocks contributing to TAI Information compiled about worldwide time signals and a report on the scientific work of the BIPM Time Section are also included. For the period 1993-1998, these files are issued from tables in the BIPM Time Section Annual Report. The Annual Reports published up to 1998 additionally include the following tables: - Frequency offsets and step adjustments of UTC - Relationship between TAI and UTC - Acronyms and locations of the timing centres which maintain a UTC(k) and/or TA(k) - Equipment and source of UTC(k) of the laboratories contributing to TAI - International GPS tracking schedules (until the Annual Report for 1997) - International GLONASS tracking schedules (until the Annual Report for 1997) - Corrections for homogeneous use of the clock rates published in the current and previous annual reports - Statistical data on the weights of the clocks contributing to TAI