**POLAR Spacecraft Status As of: Thurs 10 Jan 08, 12:00 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-1        | XSU-1        |
|          |              | TOAR472      |              |              |
+----------+--------------+--------------+--------------+--------------+
| **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    | 3 -- HRPT    | 1 - HRPT     |
|          |              |              |              |              |
| 1 = rcp  | 2 Omni=rcp   | 1-- Playback | TOAR424 low  | 3 - Playback |
| 1698.0   |              |              | power        |              |
| mhz      | Power TOAR   | 4 Restored   |              | 2-Playback   |
|          | 446          | -11 Oct 2007 | 2 & 1        |              |
| 2 = lcp  |              |              | Playback     | 4-Test &     |
| 1702.5   | 4-Playback   | 3 low power  |              | Standby      |
| mhz      |              | INOP -10 Aug | STX-1 Power  |              |
|          | 1,           | 2007         | drop         |              |
| 3= rcp   | 2,3-Degraded |              |              |              |
| 1707.0   |              |              | STX-4 no     |              |
| mhz      |              |              | modulation   |              |
|          |              |              |              |              |
| 4= rcp   |              |              |              |              |
| 2247.5   |              |              |              |              |
| mhz      |              |              |              |              |
+----------+--------------+--------------+--------------+--------------+
| #        | [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      |              |
+----------+--------------+--------------+--------------+--------------+
| *        | 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        |              |              |
+----------+--------------+--------------+--------------+--------------+
| **\`A    | Nominal      | Nominal      | Nominal      | Nominal      |
| MSU-A2** |              |              |              |              |
+----------+--------------+--------------+--------------+--------------+
| **       | 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        |              |              |
+----------+--------------+--------------+--------------+--------------+
| ###      |              |              |              | Nominal      |
|  MHS/MIU |              |              |              |              |
|          |              |              |              | Fly Wheel    |
|          |              |              |              | Motor        |
|          |              |              |              | Current      |
|          |              |              |              | Spiking but  |
|          |              |              |              | not alarming |
|          |              |              |              | since 27 Dec |
|          |              |              |              | 06           |
|          |              |              |              |              |
|          |              |              |              | Entered      |
|          |              |              |              | Motor Spin   |
|          |              |              |              | State on 27  |
|          |              |              |              | March 07     |
|          |              |              |              |              |
|          |              |              |              | H4 gain      |
|          |              |              |              | increased 2  |
|          |              |              |              | Oct 07       |
|          |              |              |              |              |
|          |              |              |              | H3 gain      |
|          |              |              |              | increased    |
|          |              |              |              | 31Oct 07     |
+----------+--------------+--------------+--------------+--------------+
| **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=6 | -CDEM-HVPS=2 | ec-CH-HVPS=1 |
|          |              |              |              |              |
|          | P            | P            | P            | 27 June 06   |
|          | -CDEM-HVPS=0 | -CDEM-HVPS=5 | -CDEM-HVPS=4 | 17:00z       |
|          |              |              |              |              |
|          |              | 27 Jun       | 27 June 06   | Pr           |
|          |              | 0615:30z     | 16:00z       | ot-CH-HVPS=0 |
+----------+--------------+--------------+--------------+--------------+
| **SBUV** |              | Operational  | Nominal      | Nominal      |
|          |              |              |              |              |
|          |              | Degraded     | Anode Mode   | Anode mode   |
|          |              | Ozone data   |              |              |
|          |              |              | Plan sweep   | since 6 July |
|          |              | Backup       | mode         | 05 13:30z    |
|          |              | Diffuser     |              |              |
|          |              | inop         | Standard Ops | Electronics  |
|          |              |              |              | turnoff      |
|          |              | Primary      | TOAR 463 sun | taken out of |
|          |              | Diffuser     | glint        | STESM        |
|          |              | deployment   |              | safestate    |
|          |              | problem TOAR | IBSL test    | table        |
|          |              | 426          | performed 12 |              |
|          |              |              | Sept 06      | TOAR 462 sun |
|          |              | AMSU EMI     |              | glint        |
|          |              | causing      | Grating      |              |
|          |              | erratic      | motor        |              |
|          |              | Behavior in  | i            |              |
|          |              | PMT cathod,  | nvestigation |              |
|          |              | range 3      |              |              |
+----------+--------------+--------------+--------------+--------------+
| **       |              | 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: In preparation for the NOAA-17 XSU swap next week, Beacon
transmission testing was completed for all spacecrafts from each site
successfully.

Initial analysis and planning for the upcoming Eclipse on 7 February
2008 has begun.

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

NOAA-15 Yaw gyro a bit quieter in the New Year, but still basically
unchanged. Daily monitoring continues.

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

On 11 January 2008, the NOAA-16 TED Electron and Proton Analyzers bias
voltages will be adjusted. The Electron Analyzer will be adjusted from 6
to 7, and Proton Analyzer from 5 to 7. This request came from SEC based
on the in-flight calibrations for the TED instruments show that the
channel multiplier gains are inadequate.

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

On 15 January 2008, during rev 28899 beginning at 21:18z, the cross
strapping unit (XSU) on NOAA-17 will be switched to the redundant side.
There will be outage of HRPT during the contact while the transmitters
are turned off. TIP will be configured to beacon, BTX#2, 137.77MHz. A
shift in the instrument analog values as the XSU switches causes clocks
to re-synchronize and may be observed as it was for the NOAA-16 XSU
swap. HRPT should be commanded on before loss of signal over the CDA.
There will be a gap in the data of approximately one major frame.

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

TIP drift caused NTIP1_2 and NDCS12V to exceed their YH limits. They
were adjusted by John Vollmer.

On 11 January 2008, the NOAA-18 TED Proton Analyzers bias voltages will
be adjusted. The Proton Analyzer will be changed from 0 to 1. This
request came from SEC; the multiplier gain in the 0-degree, high-energy
proton analyzer is not adequate.

MetOp-A: There were relatively no changes to the MetOp-A health
situation during the past week.

The AMSU-A1 A1-2 reflector cold cal counts (Dig A telemetry) were
documented as out of spec via AR7221 during the SIOV activities in
January 2007.  The CVF daily reports continue to document an increasing
frequency of limit violations for the cold cal and warm load reflector
position counts.  Typically a spot check of various reflector positions
for trending (i.e. Pos 1, 15, 30, CC and WL) is performed.  The A1-2
Reflector Cold Cal position counts since October 2007 are shown in
Figure 2, demonstrating a trend downwards in counts for both the first
look and second look counts (a longer term plot is currently in work). 
This is still an acceptable condition, but we should continue to monitor
this trend.

![](media/image4.jpeg){width="9.6875in" height="6.0in"}

Figure 2 MetOp-A AVHRR (2007/274-2008/010)