**POLAR Spacecraft Status As of: Thurs 5 June 2008, 16:00 EST**

*(Changes* from last week in bold border)

+----------+--------------+--------------+--------------+--------------+
| **Subs   | **NOAA-15K** | **NOAA-16L** | ##           | ##           |
| ystem/** |              |              | ### NOAA-17M | ### NOAA-18N |
|          | AM: 17:49=AN | PM: 15:04=AN |              |              |
| **Com    |              |              | AM: 22:23=AN | PM 13:49=AN  |
| ponent** | GAC data     | GAC data     |              |              |
|          | only         |              | GAC&LAC data | GAC & LAC    |
|          |              |              |              | data         |
+==========+==============+==============+==============+==============+
| **LA     | 05/13/98     | 09/21/00     | 6/24/02      | ####         |
| UNCHED** |              |              |              | ### 5/20/05  |
+----------+--------------+--------------+--------------+--------------+
| **CNTL   | OBP2         | OBP2         | OBP2         | OBP2         |
| OBP**    |              |              |              |              |
+----------+--------------+--------------+--------------+--------------+
| **BUS**  | B-BUS        | B-BUS        | B-BUS        | B-BUS        |
|          |              |              |              |              |
|          | XSU-1        | XSU-2:       | XSU-2: TOAR  | XSU-1        |
|          |              | TOAR472      | 471          |              |
|          |              |              |              |              |
|          |              |              | 1/15/08      |              |
+----------+--------------+--------------+--------------+--------------+
| **BUS    | NO           | NO           | NO           | NO           |
| VETO**   |              |              |              |              |
+----------+--------------+--------------+--------------+--------------+
| *        | [Nominal     | ######       | ###### [N    | [Nominal     |
| *ADACS** | Mode]        | [RGYRO Mode] | ominal Mode] | Mode]        |
|          | {.underline} | {.underline} | {.underline} | {.underline} |
|          |              |              |              |              |
|          | Rg           | Estimate     | Rg           | Gyro-A       |
|          | mode=Monitor | Y-ROLL       | mode=Monitor | MIMU-2       |
|          |              |              |              |              |
|          | Gyro-3 Off   | Rg           | Gyro-3 Off   | Z-wheel      |
|          | 6/26/00 Gyro | mode=PASSIVE | 6/10/04      | -Pitch       |
|          | chans=AAB    |              |              |              |
|          |              | Gyros-1 & 3  | Gyro         | TOAR 447     |
|          | N2 Low PSI   | Inop/Off     | chans=AAB    |              |
|          | invalid      |              | GAS Enabled  | Z-momentum   |
|          |              | Gyro chans   | Dec 05       | transition   |
|          |              | XA-ZB        |              | complete     |
|          |              |              | \*Z Gas      |              |
|          |              | Pitch wheel  | unload =45   | Pitch        |
|          |              | bias 2400    |              | Torquer      |
|          |              |              |              | again active |
|          |              | \*Z gas      |              |              |
|          |              | unload = 145 |              |              |
|          |              |              |              |              |
|          |              | Gyro2 safe   |              |              |
|          |              | macro        |              |              |
+----------+--------------+--------------+--------------+--------------+
| **RXO**  | PRI          | PRI          | PRI          | PRI          |
|          |              |              |              |              |
|          | daily bias   | Daily Bias   | Daily Bias   | No daily     |
|          | -8 mS        | --5.5 mS     | --3 mS       | bias         |
|          |              |              |              |              |
|          | -500 mS      | -1500 mS     | -1500 mS     | -1500 mS     |
|          | 12/31/05     | 31Dec05      | 31Dec05      | 31Dec05      |
+----------+--------------+--------------+--------------+--------------+
| **CLOCK  | 2            | 2            | 2            | 2            |
| DIV**    |              |              |              |              |
+----------+--------------+--------------+--------------+--------------+
| **MIRP** | External     | External     | External     | External     |
|          | Synch        | Sync         | Sync         | Synch        |
|          | Rephase 0730 |              |              |              |
|          | daily        | Rephase each | Rephase      | Rephase      |
|          |              | orbit        | Enabled      | Enabled      |
+----------+--------------+--------------+--------------+--------------+
| **TIP    | 2            | 2            | 2            | 1            |
| SIDE**   |              |              |              |              |
|          | (since       | since        | Swapped      | Analog telem |
|          | 4/3/03)      | 4/18/05      | 9/20/06      | drifting     |
|          |              |              |              |              |
|          | 3 channels   | (analog      |              |              |
|          | inop         | drifting?)   |              |              |
+----------+--------------+--------------+--------------+--------------+
| **Rec    | DTRs 1, 2,   | DTRs 1, 2,   | DTR 1,3,4 /  | SSRs         |
| orders** | 3, 4         | 3, 4A        | SSR 2        | 1,2,3,4,5    |
|          | Safestate 1B |              |              |              |
| **(DTR,  | EOT          | Safestate 3A | S            | Safestate=5B |
| SSR)**   |              |              | afestate=SSR |              |
|          |              | 4B STIP only | 2B           | Current      |
|          |              |              |              | spikes       |
|          |              |              | 4A Pressure  |              |
|          |              |              | leak         |              |
+----------+--------------+--------------+--------------+--------------+
| **VTX**  | #1 ON        | OFF / INOP   | #2 ON        | #1 ON        |
|          |              |              |              |              |
| (APT     | As of 19     | since        | 137.62 MHZ   | 137.1 MHZ    |
| data)    | June 07      | 11/15/00     |              |              |
|          |              |              |              | As of 16 Aug |
|          |              |              |              | 07           |
+----------+--------------+--------------+--------------+--------------+
| **BTX**  | #1           | #2           | ####### #2   | #1           |
|          |              |              |              |              |
|          | 137.35 MHZ   | 137.77 MHZ   | 137.77 MHZ   | 137.35 MHZ   |
+----------+--------------+--------------+--------------+--------------+
| **STX**  | 2-Omni HRPT  | 2 -- HRPT    | 1 -- HRPT    | 3 - HRPT     |
|          |              |              |              |              |
| 1 = rcp  | 2 Omni=rcp   | 1-- Playback | TOAR424 low  | 1 - Playback |
| 1698.0   |              |              | power        |              |
| mhz      | Power TOAR   | 4 Standby    |              | 2 - Playback |
|          | 446          |              | 2 & 4        |              |
| 2 = lcp  |              | 3 low power  | Playback     | 4-Test &     |
| 1702.5   | 4-Playback   | INOP -10 Aug |              | Standby      |
| mhz      |              | 2007         | STX-1 Power  |              |
|          | 1,           |              | drop 2.29W   |              |
| 3= rcp   | 2,3-Degraded |              | 3/2/08       |              |
| 1707.0   |              |              |              |              |
| mhz      |              |              | STX-4        |              |
|          |              |              | nominal      |              |
| 4= rcp   |              |              |              |              |
| 2247.5   |              |              | STX-3 Failed |              |
| mhz      |              |              | 2/14/08      |              |
+----------+--------------+--------------+--------------+--------------+
| #        | [Array Off   | [Array Off   | [Array Off.  | [Array Off.  |
| ## POWER | -45]         | -20]         | --40]        | -40]         |
|          | {.underline} | {.underline} | {.underline} | {.underline} |
| (Array   |              |              |              |              |
| offset   | [Since       | [Since       | [Since       | [Since       |
| and CANT | 1/25/01]     | 9/13/]{.     | 1/29/04]     | 6/6/05]      |
| angle,   | {.underline} | underline}07 | {.underline} | {.underline} |
| eclipse  |              |              |              |              |
| states   | Full Sun     | Eclipse all  | Eclipse all  | Eclipse all  |
| and sun  |              | year         | year         | year         |
| angle)   | Sun Angle 13 |              |              |              |
|          |              | Sun Angle 34 | Sun Angle at | Sun Angle 63 |
|          | Uptrend to   |              | 66           | uptrend to   |
|          | 18 early Jan | Steady trend |              | 65 on        |
|          | 07           |              | Steady trend |              |
|          |              | SA CANT=22   |              | 1 Jan 07     |
|          | SA CANT=37   | degs         | SA CANT=37   |              |
|          | degs         |              | degs         | SA CANT=22   |
|          |              | Full sun S/C |              |              |
|          |              | in Sept 07   | BVR Phase    | BVR Phase    |
|          |              |              | Control      | Control      |
|          |              | BVR Phase    | auton swap   | auton swap   |
|          |              | Control      | 9/17/07      | 3/29/06 &    |
|          |              | auton swap   |              | 1/4/07       |
|          |              | 7/19/07      | Swap back    |              |
|          |              |              | 9/18/07      |              |
|          |              |              |              |              |
|          |              |              | SADPOS       |              |
|          |              |              | Enabled      |              |
|          |              |              | 2/12/08      |              |
+----------+--------------+--------------+--------------+--------------+
| *        | Nominal      | Nominal      | ### Nominal  | Nominal      |
| *AVHRR** |              |              |              |              |
|          | Channel 3B   | Recent SM    | 3A-B switch  | Channel 3B   |
|          | only         | current      | enabled      | only         |
|          |              | increases    |              |              |
|          | Occasional   |              | Previous     | Scan motor   |
|          | minor scan   | TCE24 OFF    | scan motor   | current drop |
|          | motor        | 4/14/04      | current mini | 29 Aug 06    |
|          | i            |              | surges       |              |
|          | nstabilities | Channel 3B   |              |              |
|          |              | only         |              |              |
+----------+--------------+--------------+--------------+--------------+
| **A      | Operational  | Operational  | OFF/INOP     | Nominal      |
| MSU-A1** |              |              |              |              |
|          | Ch14         | Primary PLLO | Since        | Full Scan    |
|          | inoperative  | chans 9-14   | 10/30/03     | mode         |
|          |              | bias shift.  |              |              |
|          | Ch11         |              | Survival     |              |
|          | inoperative  | Backup PLLO  | heat on.     |              |
|          |              | inop.        |              |              |
|          |              |              |              |              |
|          |              | Channel 9-14 |              |              |
|          |              | noise        |              |              |
|          |              |              |              |              |
|          |              | Channel 4    |              |              |
|          |              | severely     |              |              |
|          |              | degraded 4   |              |              |
|          |              | Mar 08       |              |              |
+----------+--------------+--------------+--------------+--------------+
| **\`A    | Nominal      | Nominal      | Nominal      | Non-nominal  |
| MSU-A2** |              |              |              |              |
|          |              |              |              | DIG-A Temps  |
|          |              |              |              | erratic      |
|          |              |              |              | 2/7/08       |
|          |              |              |              |              |
|          |              |              |              | Cold Cal Pos |
|          |              |              |              | 2 2/21/08    |
+----------+--------------+--------------+--------------+--------------+
| **       | Operational  | Operational  | Nominal      | ***Replaced  |
| AMSU-B** |              |              |              | by MHS***    |
|          | Bias in All  | Space        |              |              |
|          | Chans.       | Position-3   |              |              |
|          |              |              |              |              |
|          | Degraded     | Chan-8       |              |              |
|          | Chan-3       | degradation  |              |              |
+----------+--------------+--------------+--------------+--------------+
| ### HIRS | NOMINAL      | NOMINAL      | NOMINAL      | ########     |
|          |              |              |              | Operational  |
|          | FW Abrupt    | New all time | 1 Pixel      |              |
|          | return to    | high filter  | cross-track  | Filter Heat  |
|          | nominal      | motor        | m            | OFF.         |
|          | 7/12/05      | current      | isalignment. |              |
|          |              | reached      |              | ########     |
|          | After years  | 9/17/06.     |              |  LW channel  |
|          | of minor and |              |              | 1-12 noise T |
|          | major        | Imagery      |              | OAR 448 Loos |
|          | current      | occasionally |              | e LWIR lens. |
|          | surges       | exhibits     |              |              |
|          |              | high levels  |              | LW imagery   |
|          | FW mode=Hi   | of           |              | erratic.     |
|          | Powr         | radiometric  |              |              |
|          |              | noise        |              | CH 1 Period  |
|          |              |              |              | Monitor      |
|          |              |              |              | event 13 May |
|          |              |              |              | 08           |
+----------+--------------+--------------+--------------+--------------+
| ###      |              |              |              | Nominal      |
|  MHS/MIU |              |              |              |              |
|          |              |              |              | Fly Wheel    |
|          |              |              |              | Motor        |
|          |              |              |              | Current      |
|          |              |              |              | Spiking but  |
|          |              |              |              | not alarming |
|          |              |              |              | since 27 Dec |
|          |              |              |              | 06           |
|          |              |              |              |              |
|          |              |              |              | Entered      |
|          |              |              |              | Motor Spin   |
|          |              |              |              | State on 9   |
|          |              |              |              | May 08       |
|          |              |              |              |              |
|          |              |              |              | H4 gain      |
|          |              |              |              | increased 9  |
|          |              |              |              | May 08       |
|          |              |              |              |              |
|          |              |              |              | H3 gain      |
|          |              |              |              | increased 9  |
|          |              |              |              | May 08       |
+----------+--------------+--------------+--------------+--------------+
| **DCS**  | Nominal      | Nominal      | Nominal      | Nominal      |
|          |              |              |              |              |
| RFI      |              | Pseudo       |              | DRU's 1-7 On |
| inves    |              | message      |              |              |
| tigation |              | turned on    |              | DRU8         |
|          |              | 1/5/06       |              | inop/off     |
+----------+--------------+--------------+--------------+--------------+
| **SARR** | Operational  | Operational  | Nominal      | Nominal      |
|          |              |              |              |              |
|          | B-Side, 13   | Mode =AA     | A-side       | A-Side       |
|          | Dec 07       |              |              |              |
|          |              | A-side, AGC  | All AGC Mode | All AGC Mode |
|          | AGC Mode     | Mode         |              |              |
|          |              |              |              | Since 15 Aug |
|          | Intermittent | (B-side in   |              | 05           |
|          | failures for | FG mode)     |              |              |
|          | 243MHz A&B   |              |              |              |
|          |              | 243 MHz =    |              |              |
|          |              | INOP.        |              |              |
+----------+--------------+--------------+--------------+--------------+
| **SARP** | Nominal      | Nominal      | Nominal      | Nominal      |
|          |              |              |              |              |
|          | RCVR B/W = 2 | RCVR B/W = 2 |              | A-side 23    |
|          |              |              |              | May05        |
+----------+--------------+--------------+--------------+--------------+
| **SEM**  | Nominal      | Nominal      | Nominal      | Nominal      |
|          |              |              |              |              |
|          | E            | E            | E            | El           |
|          | -CDEM-HVPS=2 | -CDEM-HVPS=7 | -CDEM-HVPS=2 | ec-CH-HVPS=1 |
|          |              |              |              |              |
|          | P            | P            | P            | 27 June 06   |
|          | -CDEM-HVPS=0 | -CDEM-HVPS=7 | -CDEM-HVPS=4 | 17:00z       |
|          |              |              |              |              |
|          |              | 11 Jan       | 27 June 06   | Pr           |
|          |              | 0714:47z     | 16:00z       | ot-CH-HVPS=1 |
|          |              |              |              |              |
|          |              |              |              | 11 Jan 07    |
|          |              |              |              | 14:15z       |
+----------+--------------+--------------+--------------+--------------+
| **SBUV** |              | Operational  | Nominal      | Non          |
|          |              |              |              | -Operational |
|          |              | Degraded     | Anode Mode   |              |
|          |              | Ozone data   |              | Anode mode   |
|          |              |              | Plan sweep   |              |
|          |              | Backup       | mode         | since 6 July |
|          |              | Diffuser     |              | 05 13:30z    |
|          |              | inop         | Standard Ops |              |
|          |              |              |              | Electronics  |
|          |              | Primary      | TOAR 463 sun | turnoff      |
|          |              | Diffuser     | glint        | taken out of |
|          |              | deployment   |              | STESM        |
|          |              | problem TOAR | IBSL test    | safestate    |
|          |              | 426          | performed 12 | table        |
|          |              |              | Sept 06      |              |
|          |              | AMSU EMI     |              | TOAR 462 sun |
|          |              | causing      | Grating      | glint        |
|          |              | erratic      | motor        |              |
|          |              | Behavior in  | i            | Chop Motor   |
|          |              | PMT cathod,  | nvestigation | stalled 22   |
|          |              | range 3      |              | May 08.      |
|          |              |              |              | Currently    |
|          |              |              |              | all motors   |
|          |              |              |              | turned off   |
+----------+--------------+--------------+--------------+--------------+
| **       |              | ON           | ON           | ON           |
| SADPOS** |              |              |              |              |
|          |              | Enabled      | ENABLED      | Enabled      |
|          |              | MFactor50%   |              |              |
|          |              |              | Timer =      | Timer =12    |
|          |              | Timer = 12   | 12mins       | mins         |
|          |              | mins         |              |              |
+----------+--------------+--------------+--------------+--------------+
| **T      | TCE26 & 15H  | Nominal      | TCE3H Batt   | All TCE's    |
| HERMAL** |              |              | 2A heater    | active       |
|          | Telem valid  | TCE24 OFF    | failed ON,   |              |
| Heaters, |              | 4/14/05      | turned off   | HIRS filter  |
| louvers  | TOAR 432     |              | 8/26/03      | heater       |
|          | closed       | (AVHRR H&L)  |              | turned OFF   |
| TCE's    |              |              | AMSU-A1      | 9/28/06      |
|          | TCE24L&25L   | HIRS Filter  | survival     |              |
|          | (HIRS &      | heater       | heaters on   |              |
|          | AVHRR)       | turned OFF   | 10/29/03     |              |
|          | failed       | 1/18/05      |              |              |
|          | 5/13/98      |              |              |              |
|          |              |              |              |              |
|          | RCE          |              |              |              |
|          | thermostat   |              |              |              |
|          | failed       |              |              |              |
|          | 5/13/98      |              |              |              |
|          |              |              |              |              |
|          | Spacecraft   |              |              |              |
|          | in thermal   |              |              |              |
|          | uptrend      |              |              |              |
+----------+--------------+--------------+--------------+--------------+

**COMMENTS/CHANGES:**

MISC:

NOAA-15: There were relatively no changes to the NOAA-15 bus or payload
health situation during the past week.

NOAA-15 IMU status is unchanged. Daily monitoring continues.

The pitch (Z) RWA seasonal transition is complete. The RWA speed is now
about +700 RPM.

NOAA-16: There was relatively no change in the performance of the
NOAA-16 bus & payload subsystems during the past week.

NOAA-16 shunt temperature remains below new yellow high limit of 72.62C.

The NOAA-16 SARR 121 & 243 AGCs are degrading, especially for the 121
Rx. No limits have been violated and instrument is operating within
specs. Response from CTEC, "The CTEC noticed that the 121.5 MHz Band has
been intermittent since March 2005 on SARR S8 (NOAA-16). We have
reported this problem to the COSPAS/SARSAT Secretariat in our periodic
report since then. At the time, we switched to the side B without
improvement. We then switched back to side A. It was concluded that the
problem was a loss in the RF assembly (prior to the receiver input) that
is temperature sensitive. This problem is also present and permanent on
the 243 MHz band for S8. Since that time, the 121.5 MHz band had limited
operation period over a pass. You can see on the plot that you sent me
that there were successive drops in average AGC from that period. It is
possible that the 121.5 MHz problem is now permanent". See Figures 3-6.

NOAA-17: There was relatively no change in the performance of the
NOAA-17 bus & payload subsystem during the past week.

NOAA-17 bus voltage had a spike of 29.12 volts on 24 May 2008 (08/145)
at 11:30z. See Figure 7.    It appears the shunts are responding to a
decrease in load. See Figure 8.  What is causing change in the
spacecraft load is being investigated by analysis of bus current and
what has changed from 2006 to 2007 to 2008.

NOAA-18: There were relatively no changes to the NOAA-18 health
situation during the past week.

A motor power toggling sequence for NOAA-18 SBUV is planned for the
afternoon of 2008/157 (June 5, 2008) but may be postponed. This will
attempt to restore operational ability to the SBUV Chopper Motor that
has been non-functional since its anomaly on 22 May 2008 (2008/143).

NOAA-18's YH limit for NDDR3I was adjusted for TIP Drift. John Vollmer
is the POC.

MetOp-A: There were relatively no changes to the health and safety of
the NOAA instruments on MetOp-A this past week.

 

[Trend Observations (NOAA Instruments) ]{.underline}

·         A review of the EUMETSAT analog housekeeping plots for this
week shows that all parameters are nominal.

·         Based on NASA's Digital A housekeeping and science trending
reports, all parameters are nominal and stable.  All performance
parameters are well within specification (e.g. NEdT, NEdN, NEdA and
SNR). 

·         The HIRS Filter Wheel re-synch period during this reporting
period averaged between 94-95 seconds between resynchs.

NOTES: Figures 1 and 2 have been omitted for web listing.

![](media/image4.jpeg){width="8.895833333333334in"
height="6.697916666666667in"}Figure 3 NOAA-16 SAR (2008/124-135)

![](media/image5.jpeg){width="8.909722222222221in"
height="6.627777777777778in"}

Figure 4 NOAA-16 SAR (2008/107-155)

![](media/image6.jpeg){width="8.909722222222221in"
height="6.313888888888889in"}

Figure 5 NOAA-16 SAR (2003/128-2008/155)

![](media/image7.jpeg){width="8.89861111111111in"
height="6.501388888888889in"}

Figure 6 NOAA-16 SAR (2008/099-155)

![](media/image8.jpeg){width="8.926388888888889in"
height="6.502777777777778in"}

Figure 7 NOAA-18 EPS (2008/054-150)

![](media/image9.jpeg){width="8.901388888888889in"
height="6.626388888888889in"}

Figure 8 NOAA-16 Shunts (2008/145-146)