**POLAR Spacecraft Status As of: Tues, 6 Dec 05, 15:00 EST**

*(changes from last week in bold border)*

+----------+--------+--------+--------+---------+---------+---------+
| **Subs   | **NOAA | **NOAA | **NOAA | **NOA   | ##### N | ##### N |
| ystem/** | -12D** | -14J** | -15K** | A-16L** | OAA-17M | OAA-18N |
|          |        |        |        |         |         |         |
| **Com    | AM     | AM:    | AM:    | PM:     | AM:     | PM      |
| ponent** | 16     | 20     | 17     | 1       | 2       | 1       |
|          | :56=AN | :57=AN | :57=AN | 4:54=AN | 2:24=AN | 3:54=AN |
|          |        |        |        |         |         |         |
|          | STIP   | STIP   | GAC    | GAC&LAC | GAC&LAC | GAC &   |
|          | data   | data   | data   | data    | data    | LAC     |
|          | only   | only   | only   |         |         | data    |
+----------+--------+--------+--------+---------+---------+---------+
| **LA     | 05     | 12     | 05     | 0       | 6/24/02 | ##      |
| UNCHED** | /14/91 | /30/94 | /13/98 | 9/21/00 |         | ##### 5 |
|          |        |        |        |         |         | /20/05  |
+----------+--------+--------+--------+---------+---------+---------+
| **CNTL   | OBP2   | OBP2   | OBP2   | OBP2    | OBP2    | OBP2    |
| OBP**    |        |        |        |         |         |         |
|          | Rec    | OBP1   |        |         |         |         |
|          | ursive | inope  |        |         |         |         |
|          | SCT    | rative |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BUS**  | B-BUS  | B-BUS  | B-BUS  | B-BUS   | B-BUS   | B-BUS   |
|          |        |        |        |         |         |         |
|          | XSU-1  | XSU2   | XSU-1  | XSU-1   | XSU-1   | XSU-1   |
|          |        | (XSU1  |        |         |         |         |
|          |        | inop)  |        | XSU-1   |         |         |
|          |        |        |        | TOAR    |         |         |
|          |        |        |        | 444     |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BUS    | NO     | NO     | NO     | NO      | NO      | NO      |
| VETO**   |        |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | [N     | [N     | [N     | ###     | #####   | [       |
| *ADACS** | ominal | ominal | ominal | ### [RG | # [Nomi | Nominal |
|          | Mode]  | Mode]  | Mode]  | YRO Mod | nal Mod | Mod     |
| X=Yaw    | {.unde | {.unde | {.unde | e]{.und | e]{.und | e]{.und |
|          | rline} | rline} | rline} | erline} | erline} | erline} |
| Y=Roll   |        |        |        |         |         |         |
|          | RG     | Rgm    | Rg     | E       | Rgmode= | Gyro-A  |
| Z=Pitch  | mode=M | ode=Di | mode=M | stimate | Monitor | MIMU-2  |
|          | onitor | sabled | onitor | ROLL    |         |         |
|          |        |        |        |         | Gyro-3  | Z-wheel |
|          | Gyro   | Gyro   | Gyro-3 | Rgmode= | Off     | -Pitch  |
|          | cha    | cha    | Off    | PASSIVE | 6/10/04 |         |
|          | ns=XYZ | ns=XYZ | 6      |         |         | TOAR    |
|          |        |        | /26/00 | Gyro-1  | Gyro    | 447     |
|          |        | I      | Gyro   | Off     | ch      |         |
|          |        | nvesti | cha    | 1       | ans=AAB | M       |
|          |        | gating | ns=AAB | 0/24/05 |         | omentum |
|          |        | insta  |        |         | Gyro-2  | shift   |
|          |        | bility | N2 Low | Gyro-3  | invest  | tra     |
|          |        |        | PSI    | Off     | igation | nsition |
|          |        |        | i      | 6/10/04 |         | started |
|          |        |        | nvalid |         | P       | 1 Nov   |
|          |        |        |        | Gyro    | robable | ended   |
|          |        |        |        | chans   | co      | 18 Nov. |
|          |        |        |        | XA-ZB   | llision |         |
|          |        |        |        |         | on 20   |         |
|          |        |        |        | TOAR    | Nov at  |         |
|          |        |        |        | 454     | 10:31z  |         |
|          |        |        |        |         |         |         |
|          |        |        |        | RGyro   |         |         |
|          |        |        |        | roll    |         |         |
|          |        |        |        | e       |         |         |
|          |        |        |        | stimate |         |         |
|          |        |        |        | gains   |         |         |
|          |        |        |        | updated |         |         |
|          |        |        |        | 11/17   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **RXO**  | PRI    | PRI    | PRI    | PRI     | PRI     | PRI     |
|          |        |        |        |         |         |         |
|          | BU     | BU     | daily  | Daily   | Daily   | No      |
|          | random | random | bias   | Bias    | Bias    | daily   |
|          | e      | e      | -8 mS  | --5.5   | --3 mS  | bias    |
|          | nables | nables |        | mS      |         |         |
|          |        | daily  | +100   |         |         |         |
|          | daily  | bia    | mS     | -100 mS |         |         |
|          | bi     | s--7.0 | 3      | 31Aug04 |         |         |
|          | as+6.5 | mS     | 1Aug04 |         |         |         |
|          | mS     |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **CLOCK  | 2      | 2      | 2      | 2       | 2       | 2       |
| DIV**    |        |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **MIRP** | Ex     | Ex     | Ex     | E       | E       | E       |
|          | ternal | ternal | ternal | xternal | xternal | xternal |
|          | Synch  | Synch  | Synch  | Sync    | Sync    | Synch   |
|          |        |        | R      |         |         |         |
|          | R      | R      | ephase | Rephase | Rephase | Rephase |
|          | ephase | ephase | 0730   | each    | Enabled | Enabled |
|          | E      | each   | daily  | orbit   |         |         |
|          | nabled | orbit  |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **TIP    | 1      | 1      | 2      | 2       | 1       | 1       |
| SIDE**   |        |        | (since |         |         |         |
|          |        |        | 4      | since   | Analog  |         |
|          |        |        | /3/03) | 4/18/05 | telem   |         |
|          |        |        |        |         | d       |         |
|          |        |        | #2 has |         | rifting |         |
|          |        |        | 3      |         |         |         |
|          |        |        | chans  |         |         |         |
|          |        |        | inop   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **Rec    | DTRs   | DTRs   | DTRs   | DTRs 1, | DTR     | SSRs    |
| orders** | 3A, 4, | 1, 2B, | 1, 2,  | 2, 3,   | 1,3,4 / | 1,      |
|          | 5B     | 5      | 3, 4   | 4A      | SSR 2   | 2,3,4,5 |
| **(DTR,  |        | Safe   | Saf    |         |         |         |
| SSR)**   | Saf    | state- | estate | Sa      | Safest  | Safes   |
|          | estate | 1B     | 1B EOT | festate | ate=SSR | tate=5B |
|          | 5B     |        |        | 3A      | 2B      |         |
|          |        |        |        |         |         | Current |
|          |        |        |        | 4B STIP |         | spikes  |
|          |        |        |        | only    |         |         |
|          |        |        |        |         |         | TOAR    |
|          |        |        |        |         |         | 450     |
+----------+--------+--------+--------+---------+---------+---------+
| **VTX**  | #1 ON  | OFF    | #1 OFF | I       | #2 ON   | #2 ON   |
|          |        | (no    |        | NOP/Off |         |         |
| (APT     | 137.50 | minal) | OFF    |         | 137.62  | 1       |
| data)    | MHZ    |        | 13Nov  | OFF     | MHZ     | 37.9125 |
|          |        | Since  | -13Dec | since   |         | MHZ     |
|          |        | 8/2/05 |        | 1       |         |         |
|          |        |        |        | 1/15/00 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BTX**  | #1     | #2     | #1     | #2      | ###     | #1      |
|          |        |        |        |         | #### #2 |         |
|          | 136.77 | 137.77 | 137.35 | 137.77  |         | 137.35  |
|          | MHZ    | MHZ    | MHZ    | MHZ     | 137.77  | MHZ     |
|          |        |        |        |         | MHZ     |         |
+----------+--------+--------+--------+---------+---------+---------+
| **STX**  | 1 --   | 3 --   | 2-Omni | 2 --    | 3 --    | 1 -     |
|          | HRPT;  | HRPT   | HRPT   | HRPT    | HRPT    | HRPT    |
| 1 = rcp  |        |        |        |         |         |         |
| 1698.0   | 2,3 -  | 2, 1   | 2      | 1--     | TOAR424 | 3 -     |
| mhz      | Pl     | --     | om     | P       | low     | P       |
|          | ayback | Pl     | ni=rcp | layback | power   | layback |
| 2 = lcp  |        | ayback |        |         |         |         |
| 1702.5   |        |        | Power  | 4 --    | 2 & 4   | 2-P     |
| mhz      |        |        | drop   | P       | P       | layback |
|          |        |        |        | layback | layback |         |
| 3= rcp   |        |        | TOAR   |         |         | 4-Test  |
| 1707.0   |        |        | 446    | & MCM   | 1-      | &       |
| mhz      |        |        |        | usage   | Standby | Standby |
|          |        |        | 4-Pl   |         |         |         |
| 4= rcp   |        |        | ayback | 3 low   | STX-1   |         |
| 2247.5   |        |        |        | power   | Power   |         |
| mhz      |        |        | 1,     | unused  | drop    |         |
|          |        |        | 2,3-De |         | TOAR    |         |
|          |        |        | graded |         | 443.    |         |
+----------+--------+--------+--------+---------+---------+---------+
| #        | [Ar    | [Array | [Array | [Array  | [Array  | [Array  |
| ## POWER | rayOff | Off    | Off    | Off     | Off.    | Off.    |
|          | +60]   | -50]   | -45]   | -4      | --4     | -4      |
| (Array   | {.unde | {.unde | {.unde | 0]{.und | 0]{.und | 0]{.und |
| offset   | rline} | rline} | rline} | erline} | erline} | erline} |
| and CANT |        |        |        |         |         |         |
| angle,   | since  | Batts  | Since  | Since   | Since   | [S]{.   |
| charge & | 6      | 1&3V   | 1      | 7/16/02 | 1/29/04 | underli |
| V/T      | /23/05 | /T=6/9 | /25/01 |         |         | ne}ince |
| rates,   |        |        |        | Eclipse | Eclipse | 6/6/05  |
| eclipse  | Full   | Batt2  | Full   | all     | all     |         |
| states   | Sun    | VT=7/9 | Sun    | year    | year    | Eclipse |
| and sun  |        |        |        |         |         | all     |
| angle)   | Sun    | Since  | Sun    | Sun     | Sun     | year    |
|          | Angle  | 11     | Angle  | Angle   | Angle   |         |
|          | 16 up  | /22/05 | 14     | 41      | at 68   | TOAR    |
|          | to 22  |        |        |         |         | 453 on  |
|          | in     | E      | Up to  | Start   | Steady  |         |
|          | early  | clipse | 15     | new     | trend   | Batt    |
|          | Jan    | all    | m      | uptrend |         | C/D     |
|          |        | year   | id-Dec |         | Batts   | ratio   |
|          | Batts  |        |        | Batts   | 1-3=    |         |
|          | 1      | Sun    | Batts  | 1-3=    | LRC     | Batts   |
|          | &2=LRC | angle  | 1-3=   | LRC     |         | 1-3=LRC |
|          |        | 48     | LRC    |         | V/T=    |         |
|          | Batt   |        |        | V/T=4/8 | 4/8     | Batts   |
|          | 1&2    | Steady | V      |         |         | 1-3     |
|          | V/T=4  | trend  | /T=7/9 | SA      | SA      | V/T=4/8 |
|          |        |        |        | CANT=22 | CANT=37 |         |
|          | Shunt  | Batts  | SA     | degs    | degs    | SADE -1 |
|          | de     | 1-3=   | C      |         |         | 7/29/05 |
|          | graded | LRC    | ANT=37 |         |         |         |
|          |        |        | degs   |         |         | SA      |
|          | SA     | De     |        |         |         | CANT=22 |
|          | C      | graded |        |         |         |         |
|          | ANT=37 | shunts |        |         |         |         |
|          | degs   |        |        |         |         |         |
|          |        | SA     |        |         |         |         |
|          |        | C      |        |         |         |         |
|          |        | ANT=22 |        |         |         |         |
|          |        | degs   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | E      | N      | V       | ###     | Nominal |
| *AVHRR** | ominal | rratic | ominal | ariable | Nominal |         |
|          |        |        |        |         |         | 3A-B    |
|          |        | Fr     | Rare   | Nominal | 3A-B    | switch  |
|          |        | equent | major  | last    | switch  | D       |
|          |        | scan   | scan   | week    | enabled | isabled |
|          |        | motor  | motor  |         |         | 8/05/05 |
|          |        | c      | s      | No bar  |         |         |
|          |        | urrent | urges. | codes   |         | Channel |
|          |        | surge  | Last   | since   |         | 3B only |
|          |        |        |        | 12 Oct. |         |         |
|          |        | Occa   | In     |         |         |         |
|          |        | sional | cident | TCE24   |         |         |
|          |        | i      | 11     | OFF     |         |         |
|          |        | magery | /18/04 | 4/14/04 |         |         |
|          |        | bar    |        |         |         |         |
|          |        | codes  | R      | Channel |         |         |
|          |        |        | educed | 3B      |         |         |
|          |        | Ch     | sta    | only.   |         |         |
|          |        | annels | bility |         |         |         |
|          |        | 2&4    | last   |         |         |         |
|          |        | APT    | week   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | Opera  | Oper    | O       | Nominal |
| MSU-A1** |        |        | tional | ational | FF/INOP |         |
|          |        |        |        |         |         | Full    |
|          |        |        | Ch14   | Primary | Since   | Scan    |
|          |        |        | inope  | PLLO    | 1       | mode    |
|          |        |        | rative | chans   | 0/30/03 |         |
|          |        |        |        | 9-14    |         |         |
|          |        |        | Ch11   | bias    | S       |         |
|          |        |        | inope  | shift.  | urvival |         |
|          |        |        | rative |         | heat    |         |
|          |        |        |        | Backup  | on.     |         |
|          |        |        |        | PLLO    |         |         |
|          |        |        |        | inop.   |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | Channel |         |         |
|          |        |        |        | 9-14    |         |         |
|          |        |        |        | noise   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | N      | Nominal | Nominal | Nominal |
| MSU-A2** |        |        | ominal |         |         |         |
|          |        |        |        | Space   |         | Full    |
|          |        |        |        | Pos     |         | scan    |
|          |        |        |        | ition-2 |         | mode    |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | Opera  | Oper    | Nominal | ***R    |
| AMSU-B** |        |        | tional | ational |         | eplaced |
|          |        |        |        |         |         | by      |
|          |        |        | Bias   | Space   |         | MHS***  |
|          |        |        | in All | Pos     |         |         |
|          |        |        | Chans. | ition-3 |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Motor  | IPD     |         |         |
|          |        |        | surges | reports |         |         |
|          |        |        | most   | channel |         |         |
|          |        |        | recent | 8       |         |         |
|          |        |        | 11     | degr    |         |         |
|          |        |        | /14/04 | adation |         |         |
|          |        |        |        |         |         |         |
|          |        |        | de     |         |         |         |
|          |        |        | graded |         |         |         |
|          |        |        | data   |         |         |         |
|          |        |        | on     |         |         |         |
|          |        |        | Chan-3 |         |         |         |
|          |        |        | since  |         |         |         |
|          |        |        | 4/30   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ### HIRS | OF     | N      | N      | Oper    | NOMINAL | ######  |
|          | F/Inop | OMINAL | OMINAL | ational |         | ## Oper |
|          |        |        |        |         | 1 Pixel | ational |
|          | Turned | Opera  | Yellow | Imagery | cross   |         |
|          | off    | tional | status | high    | track   | Status  |
|          | 6      |        |        | levels  | misali  | dow     |
|          | /23/05 | Occa   | Since  | radi    | gnment. | ngraded |
|          |        | sional | 16 May | ometric |         | to      |
|          | For    | loss   | 05     | noise   |         | Yellow  |
|          | power  | of     |        |         |         | 15 Aug  |
|          | b      | Fwheel | FW     | TOAR    |         | 05      |
|          | alance | synch  | Abrupt | 441     |         |         |
|          |        |        | return | CLOSED  |         | #####   |
|          | Filter |        | to     |         |         | ### LW  |
|          | Wheel  |        | n      | Occ     |         | channel |
|          | turned |        | ominal | asional |         |  1-12 n |
|          | OFF    |        | 7      | major   |         | oise TO |
|          | 10/    |        | /12/05 | FM      |         | AR 448  |
|          | 17/02. |        |        | surges, |         |         |
|          |        |        | FW     | most    |         | LW      |
|          |        |        | m      | recent  |         | Noise   |
|          |        |        | ode=Hi |         |         | i       |
|          |        |        | Powr   | 12/9/04 |         | mproved |
|          |        |        |        |         |         | since   |
|          |        |        |        |         |         | 14 Oct  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Problem |
|          |        |        |        |         |         | i       |
|          |        |        |        |         |         | solated |
|          |        |        |        |         |         | to      |
|          |        |        |        |         |         | loose   |
|          |        |        |        |         |         | LWIR    |
|          |        |        |        |         |         | lens    |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | Nominal |
|  MHS/MIU |        |        |        |         |         |         |
|          |        |        |        |         |         | Space   |
|          |        |        |        |         |         | View=0  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Invest  |
|          |        |        |        |         |         | igating |
|          |        |        |        |         |         | change  |
|          |        |        |        |         |         | in      |
|          |        |        |        |         |         | motor   |
|          |        |        |        |         |         | current |
|          |        |        |        |         |         | trend   |
+----------+--------+--------+--------+---------+---------+---------+
| **MSU**  | OF     | Opera  |        |         |         |         |
|          | F/Inop | tional |        |         |         |         |
|          |        |        |        |         |         |         |
|          | Turned | Scan   |        |         |         |         |
|          | off    | motor  |        |         |         |         |
|          | for    | and    |        |         |         |         |
|          | power  | a      |        |         |         |         |
|          | b      | ntenna |        |         |         |         |
|          | alance | pr     |        |         |         |         |
|          |        | oblems |        |         |         |         |
|          | 6      |        |        |         |         |         |
|          | /23/05 | End of |        |         |         |         |
|          |        | life   |        |         |         |         |
|          |        | test   |        |         |         |         |
|          |        | plans  |        |         |         |         |
|          |        | un     |        |         |         |         |
|          |        | derway |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SSU**  |        | N      |        |         |         |         |
|          |        | ominal |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DCS**  | N      | N      | N      | Nominal | Nominal | Nominal |
|          | ominal | ominal | ominal |         |         |         |
|          |        |        |        |         |         | DRU's   |
|          |        |        |        |         |         | 1-7 On  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | DRU8    |
|          |        |        |        |         |         | off     |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | TOAR    |
|          |        |        |        |         |         | 449     |
+----------+--------+--------+--------+---------+---------+---------+
| **SARR** |        | N      | Opera  | Oper    | Nominal | Nominal |
|          |        | ominal | tional | ational |         |         |
|          |        |        |        |         | A-side  | A-Side  |
|          |        |        | A      | Mode    |         |         |
|          |        |        | -Side, | =AA     | All AGC | All AGC |
|          |        |        | AGC    |         | Mode    | Mode    |
|          |        |        | Mode   | A-side, |         |         |
|          |        |        |        | AGC     |         | Since   |
|          |        |        | Interm | Mode    |         | 15 Aug  |
|          |        |        | ittent |         |         | 05      |
|          |        |        | fa     | (B-side |         |         |
|          |        |        | ilures | in FG   |         |         |
|          |        |        | for    | mode)   |         |         |
|          |        |        | 243MHz |         |         |         |
|          |        |        | A&B    | 243 MHz |         |         |
|          |        |        |        | = INOP. |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARP** |        | OFF    | N      | Nominal | Nominal | Nominal |
|          |        |        | ominal |         |         |         |
|          |        | Power  |        | RCVR    |         | A-side  |
|          |        | F      | RCVR   | B/W = 2 |         | 23 May  |
|          |        | ailure | B/W =  |         |         |         |
|          |        |        | 2      |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SEM**  | ON/N   | Opera  | N      | Nominal | Nominal | Nominal |
|          | ominal | tional | ominal |         |         |         |
|          |        |        |        | E-CDEM  | E-CDEM  | Turned  |
|          | Turned | El     | E      | -HVPS=5 | -HVPS=2 | on      |
|          | on     | ec-CH- | -CDEM- |         |         |         |
|          | 8      | HVPS=0 | HVPS=2 | P-CDEM  | P-CDEM  | 6 June  |
|          | /30/04 |        |        | -HVPS=4 | -HVPS=3 | at      |
|          |        | Pr     | P      |         |         | 14:05z  |
|          | El     | ot-CH- | -CDEM- |         |         |         |
|          | ec-CH- | HVPS=0 | HVPS=0 |         |         |         |
|          | HVPS=4 |        |        |         |         |         |
|          |        | 1 of 4 |        |         |         |         |
|          | Pr     | T      |        |         |         |         |
|          | ot-CH- | scopes |        |         |         |         |
|          | HVPS=0 | inop   |        |         |         |         |
|          |        |        |        |         |         |         |
|          | TED    | Auto   |        |         |         |         |
|          | l      | nomous |        |         |         |         |
|          | evel=3 | TED    |        |         |         |         |
|          | as of  | sh     |        |         |         |         |
|          | 27     | utdown |        |         |         |         |
|          | Sept   | 24     |        |         |         |         |
|          |        | Sept   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SBUV** |        | De     |        | Oper    | Nominal | Nominal |
|          |        | graded |        | ational |         |         |
|          |        |        |        |         | Anode   | Anode   |
|          |        | Grate  |        | D       | Mode    | mode    |
|          |        | motor  |        | egraded |         |         |
|          |        | sticks |        | Ozone   | Plan    | since 6 |
|          |        |        |        | data    | sweep   | July    |
|          |        | Flex   |        |         | mode    | 13:30z  |
|          |        | memory |        | Backup  |         |         |
|          |        | 3      |        | D       | S       |         |
|          |        | (giant |        | iffuser | tandard |         |
|          |        | step)  |        | inop    | Ops     |         |
|          |        | ops    |        |         | Pr      |         |
|          |        | sus    |        | Primary | ocedure |         |
|          |        | pended |        | D       | changes |         |
|          |        | 1      |        | iffuser |         |         |
|          |        | 2/2/03 |        | dep     | fort    |         |
|          |        |        |        | loyment | hcoming |         |
|          |        | R      |        | problem |         |         |
|          |        | educed |        | TOAR    |         |         |
|          |        | oper   |        | 426     |         |         |
|          |        | ations |        |         |         |         |
|          |        |        |        | AMSU    |         |         |
|          |        | Tra    |        | EMI     |         |         |
|          |        | nsient |        | causing |         |         |
|          |        | a      |        | erratic |         |         |
|          |        | nomaly |        | B       |         |         |
|          |        |        |        | ehavior |         |         |
|          |        | 1 Sept |        | in PMT  |         |         |
|          |        | 05     |        | cathod, |         |         |
|          |        |        |        | range 3 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | N/A    | ON      | ON      | ON      |
| SADPOS** |        |        |        |         |         |         |
|          |        |        |        | Enabled | ENABLED | Enabled |
|          |        |        |        | MFa     |         |         |
|          |        |        |        | ctor50% | Timer = | Timer   |
|          |        |        |        |         | 12mins  | =12     |
|          |        |        |        | Timer = |         | mins    |
|          |        |        |        | 12 mins |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **T      | N      | N      | TCE26  | Nominal | TCE3H   | All     |
| HERMAL** | ominal | ominal | & 15H  |         | Batt 2A | TCE's   |
|          |        |        |        | TCE24   | heater  | active  |
| Heaters, | TCE's  |        | Telem  | OFF     | failed  |         |
| louvers  | back   |        | i      | 4/14    | ON,     |         |
|          | to     |        | nvalid | (AVHRR  | turned  |         |
| TCE's    | n      |        |        | H&L)    | off     |         |
|          | ominal |        | TOAR   |         | 8/26/03 |         |
|          | c      |        | 432    | HIRS    | TOAR    |         |
|          | onfigu |        |        | Filter  | 428     |         |
|          | ration |        | TCE2   | heater  |         |         |
|          | fol    |        | 4L&25L | turned  | CLOSED  |         |
|          | lowing |        | (HIRS  | OFF     | 9/14/04 |         |
|          | 7      |        | &      | 1/18/05 | no      |         |
|          | /25/04 |        | AVHRR) |         | cor     |         |
|          | U      |        | failed |         | rective |         |
|          | Vtrip. |        | 5      |         | action  |         |
|          |        |        | /13/98 |         | po      |         |
|          |        |        |        |         | ssible. |         |
|          |        |        | RCE    |         |         |         |
|          |        |        | ther   |         | AMSU-A1 |         |
|          |        |        | mostat |         | s       |         |
|          |        |        | failed |         | urvival |         |
|          |        |        | 5      |         | heaters |         |
|          |        |        | /13/98 |         | on      |         |
|          |        |        |        |         | 1       |         |
|          |        |        |        |         | 0/29/03 |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N18 |
|          | *N12** | *N14** | *N15** |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-12: There were no changes to N12 during the past reporting period.

NOAA-14: The N14 AVHRR scan motor continues to experience frequent
(several per day) current spikes that affect imagery

primarily by causing occasional bar codes on HRPT images. Synch delta is
also highly variable but does seem to benefit rephase enable operation
that is executed out of stored commands over the South Pole each orbit
(illustration 1).

Power balance appears to have maintained optimization during the past
week with generally stable bus voltages, and much lower average shunt
driver voltages (illustration 2). Otherwise there was no change to N14
during the past week.

NOAA-15: N15 VTX-1 (APT data) remains off until 13 Dec because of an RF
conflict with N12. One item of note on N15 was the AVHRR scan motor
current which surged approximately 8 mAmps on 28 Nov but, unlike recent
previous experience, has not yet quite stabilized. At the moment, the
N15 AVHRR scan motor (which has experienced several severe anomalies in
the past 5 years) is operating at its highest scan motor current value
since August of 2004. On the positive side, imagery, synch delta and
AVHRR component temperatures all remain stable and nominal (illustration
3 and 4). Otherwise, the other payloads on N15 were nominal during the
past week (illustration 5 for HIRS health depictions and illustration 6,
for AMSU's) as was the rest of the spacecraft (illustration 7 depicts
ADACS health.)

NOAA-16: The N16 AVHRR scan motor current, unlike N15's, AVHRR fell to
its lowest (most nominal) value in many months

this week and is now within what has historically been considered a
perfectly nominal value range (illustration 8). This assessment is
further reinforced by the fact that wave patterns in the HRPT images
have recently begun to disappear (bar codes and MIRP frame losses have
been absent for several months already) and synch delta is also in a
nominal range (illustration 9 & 10). We've been here before however, and
the only constant that can be expected from this payload is its
performance variability. Otherwise, all other N16 payloads were nominal
last week although the HIRS continues to operate with a filter motor
current at or near all time high values with no reports of imagery
degradation. (Illustration 11 depicts the AMSU's and illustration 12 the
HIRS.)

The N16 ADACS subsystem remained stable within improved values after the
uploaded of updated Rgyro roll estimation filter gains on 17 Nov into
the control CPU (only). Without doubt, the new gains improved and
stabilized the Y-wheel situation significantly (illustration 13 and 14).
However, the temps and currents on this wheel remain historically very
elevated (illustration 15) and are expected to remain so for the
duration of the mission. On the other hand, with the improvement of N16
roll rates and errors and Y-wheel motor currents and temperatures
sustained over the past 18 days it is now assumed that this update is a
success and will be made permanent by commanding it into the non-control
CPU sometime this week. Originally, the new gains were only installed on
the control CPU in case of instability. If the new gains had threatened
attitude performance, a switch of control to the backup CPU (which still
had the old gain values) would have maintained spacecraft attitude. See
illustration XY for depictions of the sustained stability of N16 roll
axis performance.

NOAA-17: There was basically no change to N17 during the past week. The
remaining two AMSU's (illustration 16) and the

HIRS operated within the same general nominal values that they did the
previous week while the AVHRR scan motor current continued to show some
minor instabilities which remain (and hopefully will continue to remain)
well within nominal values (illustration 17). The spacecraft attitude
situation remained unchanged from last week manifesting absolutely no
residual effects from the collision it experienced on 20 Nov (see
write-up in last weeks report) with a small particle of space debris
(illustrations 18 and 19 ). No further operational actions or
reconfigurations are expected to take place in regard to that event.

NOAA-18: The N18 payload suite was nominal and stable during the past
week (illustrations 20 and 21). The MHS

flywheel motor which had recently demonstrated a new trend increase in
motor current appeared to have possible "topped out" during the past
week (illustration 22). This situation, reported in last weeks report,
was brought to the attention of EUMETSAT engineers because of concerns
that the bearings were possibly wearing out. EUMETSAT engineers analyzed
the data and concluded that this component remains nominal and that the
trend change is a feature of this component which has been seen
previously on a test MHS unit during a 5 year extended life test which
was performed between 1997 and 2002. In response to this trend change,
EMOSS will increase its vigilance over this component as a matter of
caution.

The N18 attitude situation is again in equilibrium now that the
Z-(pitch) momentum shift (and wheel rotation counter shift) process is
complete with all components operating nominally (illustration 23).

EMOSS personnel supported a meeting called by ITT at which the N18 HIRS
long wave channel (NEdN) degradation problem was addressed (TOAR 448).
This problem with this payload is an out of family behavior that causes
it to be hypersensitive to dynamic disturbances (such as solar array
slews). According to the briefing package, the slow radiometric drift
following a recent solar array slew pointed out that the radiance from
the scene was changing. This required an optical throughput change which
means an optical element in the LWIR must be moving. Optical modeling
and testing assessed many possible root causes that fit the on orbit
radiometric characteristics but the only fault that fit all the
conditions was a loose L1 relay lens. No on-orbit reconfigurations can
be implemented to correct for this situation and any future solar array
offset reconfigurations are likely to negatively affect products from
this component for a significant duration of time.

![](media/image1.png){width="8.0in" height="6.420138888888889in"}

**Illustration 1: NOAA-14 AVHRR Health Analysis**

(No different than the last several weeks.)

![](media/image2.png){width="8.25in" height="6.338888888888889in"}

**Illustration 2: NOAA-14 EPS Health Analysis**

(Remaining stable and nominal since the recent solar array offset
alteration.)

![](media/image3.png){width="8.25in" height="6.348611111111111in"}

Illustration 3: N15 AVHRR Health Analysis

(Scan motor current starting to look somewhat negative, upper right
plot, and is operating at its highest level since Aug 2004, lower left
plot. On the positive side, temperatures and synch delta values remains
stable.)

![](media/image4.png){width="5.997222222222222in"
height="7.990277777777778in"}

Illustration 3: N14 EPS Analysis (part 2)

(No problems in the battery thermal situation as a result of the VT
change either.)

Illustration 4: N15 AVHRR Imagery Analysis

(Also on the positive side, imagery remains nominal.)

![](media/image5.png){width="8.25in" height="6.348611111111111in"}

Illustration 5: N15 HIRS Health Analysis

(Continues to operate within the most stable and nominal values in the
last half decade.)

![](media/image6.png){width="8.25in" height="6.338888888888889in"}

Illustration 6: N15 AMSU Health Analysis

(Nominal and stable.)

![](media/image7.png){width="8.25in" height="6.348611111111111in"}

Illustration 7: N15 Attitude Control Analysis

(Generally nominal and stable.)

![](media/image8.png){width="8.25in" height="6.338888888888889in"}

Illustration 8: N16 AVHRR Health Analysis

(Back to nominal last week, but for how long?)

![](media/image9.png){width="8.375in" height="6.298611111111111in"}

**ILLUSTRATION 9: N16 Synch Delta Analysis**

(Nominal and stable, no MIRP rephases required since mid-November.)

![](media/image10.png){width="8.125in" height="7.128472222222222in"}

RE=MIRP

Rephase Enable

Operation.

**ILLUSTRATION 10: N16 AVHRR Imagery Analysis**

(Wave patterns starting to disappear from HRPT images for the first time
in many months. No bar coded imagery since mid-October.)

![](media/image11.png){width="8.25in" height="6.348611111111111in"}

**ILLUSTRATION 11: N16 AMSU Health Analysis**

(Nominal and stable.)

![](media/image12.png){width="8.25in" height="6.3381944444444445in"}

Illustration 12: N16 HIRS Analysis

(Remaining at or near all time high filter motor current values as well
as high low amplitude ranges. Remains on the "watch list".)

![](media/image13.png){width="8.25in" height="6.3381944444444445in"}

Illustration 13: N16 ADACS Health Analysis (Part 1)

(Remaining very stable since the new gain updates went into effect
several weeks ago following the failure of a second gyro.)

![](media/image14.png){width="8.25in" height="6.325694444444444in"}

Illustration 14: N16 ADACS Health Analysis (Part 2)

(Again very stable since the new gain updates went into effect.)

![](media/image15.png){width="8.25in" height="6.204861111111111in"}

Illustration 15: N16 RWheel Effect of New Rgyro Pitch Estimation Gains

(An obvious improvement, enough to make the change permanent, following
the failure of gyro-1 but still a long way from what had been
previously.)

![](media/image16.png){width="8.25in" height="6.331944444444445in"}

Illustration 16: N17 AMSU Health Analysis

(Nominal and stable, just like last week.)

![](media/image17.png){width="8.25in" height="6.331944444444445in"}

Illustration 17: N17 AVHRR Health Analysis

(Generally nominal and stable notwithstanding a little instability from
the scan motor current in the past several weeks, including this week.)

![](media/image18.png){width="8.25in" height="6.3493055555555555in"}

Illustration 18: N17 ADACS Analysis

(Nominal and stable all week no long term effect from the collision.)

![](media/image19.png){width="8.25in" height="6.325694444444444in"}

Illustration 19: N17 ADACS Health Analysis (Part 2)

(As stated in previous illustration, no long term impact apparent.)

![](media/image20.png){width="8.25in" height="6.35in"}

Illustration 20: N18 AMSU Health Analysis

(Nominal and stable.)

![](media/image21.png){width="8.25in" height="6.3493055555555555in"}

Illustration 21: N18 AVHRR Health Analysis

(Nominal and stable.)

![](media/image22.png){width="8.25in" height="6.325694444444444in"}

Illustration 22: N18 MHS Analysis

(Flywheel current increase seems to have topped out but remains less
stable than it has historically been.)

![](media/image23.png){width="8.25in" height="6.325694444444444in"}

Illustration 23: N18 ADACS Analysis

(Generally nominal and stable, notwithstanding the TOAR on the Z-pitch
wheel.)

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING December 2, 2005

+----------+--------+---------+---------+---------+---------+---------+
| DAY/DATE | N      | NOAA-14 | NOAA-15 | NOAA-16 | NOAA-17 | NOAA-18 |
|          | OAA-12 |         |         |         |         |         |
+----------+--------+---------+---------+---------+---------+---------+
| FRI.     | -908   | +279    | -350    | +353    | +179    | +131    |
| 11/25    | msec   | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+
| SAT.     | N/A    | +280    | -352    | +355    | +180    | +131    |
| 11/26    |        | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+
| SUN.     | N/A    | +281    | -349    | +355    | +182    | +131    |
| 11/27    |        | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+
| MON.     | -914   | +282    | -352    | +354    | +182    | +134    |
| 11/28    | msec   | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+
| TUE.     | -914   | +282    | -352    | +355    | +183    | +134    |
| 11/29    | msec   | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+
| WED.     | -414   | +278    | -352    | +357    | +183    | +136    |
| 11/30    | msec   | msec    | msec    | msec    | msec    | msec    |
|          |        |         |         |         |         |         |
|          | \*     |         |         |         |         |         |
+----------+--------+---------+---------+---------+---------+---------+
| THU.     | -414   | +280    | -355    | +356    | +184    | +137    |
| 12/01    | msec   | msec    | msec    | msec    | msec    | msec    |
+----------+--------+---------+---------+---------+---------+---------+

NOAA-14: As of 12/23/03 the TIP clock is corrected daily by --7.0 msec
to compensate for drift.

NOAA-15: As of 04/22/03 the TIP clock is corrected daily by --8.0 msec
to compensate for drift.

NOAA-16: As of 12/23/03 the TIP clock is corrected daily by -5.5 msec to
compensate for drift.

NOAA-17: As of 12/23/03 the TIP clock is corrected daily by --3.0 msec
to compensate for drift.

NOAA-12: As of 12/10/03 the TIP clock is corrected daily by +6.5 msec to
compensate for drift.

\* A clock jump of -500 milliseconds on 09/15/05 due to fractional
second daily ETCUP. A clock

> jump of +500 milliseconds on 11/30/05 due to fractional second daily
> ETCUP. Alternating +/-
>
> 500 millisecond clock jumps will occur at 76-day intervals as long as
> fractional second daily
>
> ETCUP is utilized to manage clock drift. The next -500 millisecond
> jump is expected on 02/14/06.