NOAA Office of Satellite and Product Operations

NOAA 12 DHS Subsystem Summary

Component Description Status
DTR1ADigital Tape Recorder - 1 A SideRed
DTR1BDigital Tape Recorder - 1 B SideRed
DTR2ADigital Tape Recorder - 2 A SideRed
DTR2BDigital Tape Recorder - 2 B SideRed
DTR3ADigital Tape Recorder - 3 A SideGreen
DTR3BDigital Tape Recorder - 3 B SideRed
DTR4ADigital Tape Recorder - 4 A SideGreen
DTR4BDigital Tape Recorder - 4 B SideGreen
DTR5ADigital Tape Recorder - 5 A SideRed
DTR5BDigital Tape Recorder - 5 B SideGreen
MIRPManipulated Information rate ProcessorGreen
TIP1TIROS Information Processor Side 1Green
TIP2TIROS Information Processor Side 2Green
XSU1Cross-strap Unit Side 1Green
XSU2Cross-strap Unit Side 2Green

Subsystem History:

Date Time Component Description
08/01/200612:00:00DTR4BUnlike DTR4A, DTR4-B reads 0 PSI pressure during playback and record operations. Since playback quality has not been determined to be degraded, suspect pressure sensor failure.
12/09/200420:55:00DTR3BChange safe state recorder from 3B to 5B
12/03/200420:07:12TIP1Put TIP in orbit mode
12/03/200420:06:01TIP1Put TIP into high speed dwell mode
11/29/2004DTR3BDTR3B no longer recording. Testing negative. DTR3B Status changed to Red, DHS status changed to Yellow. Safestate recorder to be changed, recursive SCT to be altered to omit DTR3B operations.
11/22/200414:50:00DTR3BDTR3B (safestate recorder) showing less than optimum performance characteristics.
06/16/200412:00:00TIP1Clock offset autonomously fell by -500 MSecs. Value will alternate between dropping or adding 500 mSecs every 77 days (as long as daily bias of +6.5 mSecs continues).
06/02/200412:00:00DTR3BModify recursive table to use DTR 3B as safestate recorder
05/14/200403:12:00DTR1ADTR-1A failure. Component status changed to RED. Taken out of operation permanently.
04/07/200421:45:00DTR1BDTR-1B taken out of service because of unreliability.
04/03/200412:01:00TIP1Clock offset autonomously increased 500 MSecs as expected. Pattern of falling and rising 500 mSecs every 77 days.
03/30/2004DTR1BDTR-1B behaving erratically. Data not being received. Motor current erratic.
01/17/2004TIP1Clock offset unexpectedly fell by -500 MSecs in one day (as compared to an average drift of -0.2 mSecs daily).
07/13/2002DTR2AN12 DTR2 Erratic operation
06/21/1996DTR5ANo head playback voltage during GAC playback. Recorder also experienced intermittent servo error and servo lock. Recorder taken out of service.
01/01/199612:00:00DTR2BDTR 2B failure
07/01/1992TIP1TIP clock jumped one half second positive on the first 24-hour ETCUP following a negative half second ETCUP correction.
05/14/199115:26:00DTR5AOn Orbit
05/14/199115:26:00DTR4AOn Orbit
05/14/199115:26:00DTR3AOn Orbit
05/14/199115:26:00DTR2AOn Orbit
05/14/199115:26:00DTR1AOn Orbit
05/14/199115:26:00TIP1On Orbit
05/14/199115:26:00MIRPOn Orbit
05/14/199115:26:00XSU1On Orbit
05/14/199115:26:00DTR1BOn Orbit
05/14/199115:26:00DTR2BOn Orbit
05/14/199115:26:00DTR3BOn Orbit
05/14/199115:26:00DTR4BOn Orbit
05/14/199115:26:00DTR5BOn Orbit
05/14/199115:26:00XSU2On Orbit
05/14/199115:26:00TIP2On Orbit