Index of /hsa/legacy/operations/moc/tco

	Name	Last modified	Size	Description
	Parent Directory		-
	tco1/	2017-01-30 08:44	-
	tco2/	2017-01-30 08:44	-
	tco3/	2017-01-30 08:44	-

Time Correlation (TCO) files

This directory contains three types of time correlation files:

tco1       TCOH  Time correlation couples (APID 1911)
tco2       TCOHK Time correlation (APID 1909)      
tco3       TCOS  Time correlation coefficients (APID 1912)

These are auxiliary telemetry that is generated inside the MCS and not on-board the spacecraft. They do not have a SCOS-2000 packet header.

Format/ICD

• Herschel-Planck Mission Control System ICD: Data Disposition System, PT-CMOC-MDS-3108-OPS-GDS, issue 1.9, 2010-03-04
• Herschel-Planck Mission Control System Time Correlator ICD, PT-CMOC-MDS-ICD-3102-OPS-GDS, issue 2.7, 2009-02-27.

Derived Products

• TimeCorr product

Known issues

• The TCOS and TCOHK files for OD-810 are empty (2011-08-01T12:28:25.000Z_2011-08-02T12:18:25.000Z). This was an OD with several problems that made it impossible to generate valid TCO files (See SCIAT-154 for further information). The impact on time correlation accuracy for that day should be quite small since the clock drift is only 60 ms/day and the software will simply extrapolate from the following day.

• No time correlation files (TCOS, TCOHK, TCOH) were produced for OD-1480, 1481, 1487, 1488, 1494. They were Saturdays and Sundays in the 16 days immediately preceding spacecraft switch-off when there was no pass. Hence, this is expected.

• There is a small overlap between the files for 2009-05-28T10:39:05.000Z 2009-05-28T10:38:44.000Z because of an overlap in the PSFs for ODs 14/15.