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NOAA 12 SEM Subsystem Summary

Component Description Status
DPUSpace environment Monitor - Data Processing UnitGreen
MEPEDSpace environment Monitor - Medium Energy Proton DetectorGreen
MUXGreen
TEDSpace environment Monitor - Total Energy DetectorGreen


Subsystem History:

Date Time Component Description
06/08/200618:18:00TEDSEM TED autonomously shut off its high voltage (a known and occasional event on pre-KLM spacecraft). Configured back to normal on 9 Jun at 01:00z via CROH COP (no SCR).
09/27/200522:40:00 SEM Electron bias to level 3
09/26/200521:25:00TEDSets electron bias voltage to level 5
09/24/200515:54:00TEDChange electron bias to level 5. ENd TED recovery operation. Payload back to normal operations.
09/24/200515:53:00TEDSet MUX to normal mode
09/24/200515:52:00TEDSet Pulse Height Discriminators to level 1
09/24/200515:51:00TEDSet SEM TED biases to known levels
09/24/200515:50:00TEDTurns on SEM High Voltages
09/24/200507:43:00TEDSEM TED autonomously shut off its high voltage. This is a known problem with pre-KLM SEMs that requires the TED be reinitialized.
08/30/200411:06:00 Turn on SEM primarily for power balance purposes.
07/29/200417:05:00 SEM power up operation canceled. Subsystem is operationally capable but will remain powered off indefinitely.
07/25/200423:20:00 Battery undervoltage safestate tripped causing power load shed that included SEM power off.
10/11/200316:47:00TEDSet TED to Electron level 3.
10/11/200316:46:00TEDSet TED to normal data multiplex
10/11/200316:45:00TEDSET SEM PHD to Level 1
10/11/200316:44:00TEDSet TED to level 1
10/11/200316:43:00TEDTurn on TED High Voltage
10/10/200305:00:00TEDSEM TED experienced an autonomous instrument reset.
03/15/200316:00:00TEDSEM limit flags indicating autonomous instrument reset.
03/15/200310:20:00TEDSet PHD level 1
03/15/200310:20:00TEDSEM reconfigured to nominal
05/14/199115:26:00TEDOn Orbit
05/14/199115:26:00MEPEDOn Orbit
05/14/199115:26:00DPUOn Orbit
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Info & History

Status Key
Status Color Meaning
GREEN Operational
(or capable of)
YELLOW Operational with limitations
(or Standby)
ORANGE Operational with Degraded Performance
RED Not Operational
BLUE Functional,
Turned Off
BLANK No Status Reported