NOAA 14 SEM Subsystem Summary

Component	Description	Status
DPU	Space environment Monitor - Data Processing Unit	Green
MEPED	Space environment Monitor - Medium Energy Proton Detector	Green
TED	Space environment Monitor - Total Energy Detector	Yellow

Subsystem History:

Date	Time	Component	Description
10/03/2006	18:00:00		Restore SEM to standard operational configuration
09/28/2006	17:05:00		Major spacecraft attitude perturbation resulted in autonomous battery undervoltage safing macro implementation turning off SEM.
12/16/2003	15:30:00	TED	Set TED electron power supply bias voltage to operational level. Recovery ops complete.
12/16/2003	13:57:00	TED	SEM TED pulse height discriminatinator to level-4 (operational value).
12/16/2003	13:56:00	TED	TED electron and proton channel biases to level 1 to continue recovery ops.
12/16/2003	13:55:00	TED	Turn TED high voltage on to continue recovery.
12/16/2003	13:53:00	TED	Turn TED off for SEM recovery operations
12/16/2003	13:53:00	TED	Turn TED ON to continue SEM recovery .
12/16/2003	09:45:00	TED	SEM TED Autonomous Reset.
03/10/2003	16:04:00	TED	Turn TED off
03/10/2003	16:04:00	TED	Turn TED On
03/10/2003	16:04:00	TED	Turn TED high voltage on
03/10/2003	16:04:00	TED	TED electron and proton channel biases to known levels
03/10/2003	16:04:00	TED	Sets pulse height discriminatinator levels to operational values
03/10/2003	16:04:00	TED	Set electron power supply bias voltage to operational level
12/14/2002	10:40:00	TED	SEM autonomous reset, recovery ops to Level 4 followed
09/01/2002		TED	SEM Autonomous Reset
10/26/2001	01:50:00	TED	Power cycled SEM TED. Set electron and proton biases to level 1, PHD to level 4, MUX to normal mode and set electron channeltron HV to level 0.
10/25/2001	20:35:00	TED	SEM TED bias reset
02/19/2001		TED	SEM testing stepped through PHD levels 1, 3 and 4.
02/08/2001	19:00:00	TED	SEM PHD levels changed from 2 to 4
01/31/2001	15:30:00	TED	SEM PHD increased
01/24/2001		TED	SEM auto shutdown and restart
01/18/2001	07:00:00	TED	SEM auto shutdown and restart @ 11:15
04/15/1999		TED	SEM 300 KeV electron level channels failed, housekeeping data nominal
11/10/1998		TED	SEM TED attempts to configure back to Level 2 unsuccessful, configured back to Level 0.
10/28/1998		TED	Power cycled SEM TED due to high electron and proton activity. Commanded to level 1
01/20/1995			SEM one of 4 telescopes is not operational, 12% data loss.
12/30/1994	10:36:00	TED	On Orbit
12/30/1994	10:36:00	MEPED	On Orbit
12/30/1994	10:36:00	DPU	On Orbit