NOAA 12 DHS Subsystem Summary

Component	Description	Status
DTR1A	Digital Tape Recorder - 1 A Side	Red
DTR1B	Digital Tape Recorder - 1 B Side	Red
DTR2A	Digital Tape Recorder - 2 A Side	Red
DTR2B	Digital Tape Recorder - 2 B Side	Red
DTR3A	Digital Tape Recorder - 3 A Side	Green
DTR3B	Digital Tape Recorder - 3 B Side	Red
DTR4A	Digital Tape Recorder - 4 A Side	Green
DTR4B	Digital Tape Recorder - 4 B Side	Green
DTR5A	Digital Tape Recorder - 5 A Side	Red
DTR5B	Digital Tape Recorder - 5 B Side	Green
MIRP	Manipulated Information rate Processor	Green
TIP1	TIROS Information Processor Side 1	Green
TIP2	TIROS Information Processor Side 2	Green
XSU1	Cross-strap Unit Side 1	Green
XSU2	Cross-strap Unit Side 2	Green

Subsystem History:

Date	Time	Component	Description
08/01/2006	12:00:00	DTR4B	Unlike 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.
12/09/2004	20:55:00	DTR3B	Change safe state recorder from 3B to 5B
12/03/2004	20:07:12	TIP1	Put TIP in orbit mode
12/03/2004	20:06:01	TIP1	Put TIP into high speed dwell mode
11/29/2004		DTR3B	DTR3B 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.
11/22/2004	14:50:00	DTR3B	DTR3B (safestate recorder) showing less than optimum performance characteristics.
06/16/2004	12:00:00	TIP1	Clock 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).
06/02/2004	12:00:00	DTR3B	Modify recursive table to use DTR 3B as safestate recorder
05/14/2004	03:12:00	DTR1A	DTR-1A failure. Component status changed to RED. Taken out of operation permanently.
04/07/2004	21:45:00	DTR1B	DTR-1B taken out of service because of unreliability.
04/03/2004	12:01:00	TIP1	Clock offset autonomously increased 500 MSecs as expected. Pattern of falling and rising 500 mSecs every 77 days.
03/30/2004		DTR1B	DTR-1B behaving erratically. Data not being received. Motor current erratic.
01/17/2004		TIP1	Clock offset unexpectedly fell by -500 MSecs in one day (as compared to an average drift of -0.2 mSecs daily).
07/13/2002		DTR2A	N12 DTR2 Erratic operation
06/21/1996		DTR5A	No head playback voltage during GAC playback. Recorder also experienced intermittent servo error and servo lock. Recorder taken out of service.
01/01/1996	12:00:00	DTR2B	DTR 2B failure
07/01/1992		TIP1	TIP clock jumped one half second positive on the first 24-hour ETCUP following a negative half second ETCUP correction.
05/14/1991	15:26:00	DTR5A	On Orbit
05/14/1991	15:26:00	DTR4A	On Orbit
05/14/1991	15:26:00	DTR3A	On Orbit
05/14/1991	15:26:00	DTR2A	On Orbit
05/14/1991	15:26:00	DTR1A	On Orbit
05/14/1991	15:26:00	TIP1	On Orbit
05/14/1991	15:26:00	MIRP	On Orbit
05/14/1991	15:26:00	XSU1	On Orbit
05/14/1991	15:26:00	DTR1B	On Orbit
05/14/1991	15:26:00	DTR2B	On Orbit
05/14/1991	15:26:00	DTR3B	On Orbit
05/14/1991	15:26:00	DTR4B	On Orbit
05/14/1991	15:26:00	DTR5B	On Orbit
05/14/1991	15:26:00	XSU2	On Orbit
05/14/1991	15:26:00	TIP2	On Orbit