**POLAR Spacecraft Status As of: Tues, 22 Nov, 16:00 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 |         | u       |
|          |        |        | nvalid |         | P       | nderway |
|          |        |        |        | Gyro    | robable | since 1 |
|          |        |        |        | chans   | co      | Nov 05. |
|          |        |        |        | X-Z     | llision |         |
|          |        |        |        | only    | on 20   |         |
|          |        |        |        |         | Nov at  |         |
|          |        |        |        | TOAR    | 10:31z  |         |
|          |        |        |        | 454     |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | 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 | 2.66    | spikes  |
|          |        |        |        | only    | Mbps    |         |
|          |        |        |        |         | reverse | TOAR    |
|          |        |        |        |         | p       | 450     |
|          |        |        |        |         | layback |         |
|          |        |        |        |         | 18 Oct  |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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    | Array   |
| and sun  |        |        |        |         |         | 360     |
| angle)   | Sun    | Since  | Sun    | Sun     | Sun     | slew    |
|          | Angle  | 11     | Angle  | Angle   | Angle   | test on |
|          | 13     | /22/05 | 12     | 41      | at 68   | 21 & 22 |
|          | start  |        |        |         |         | Sept    |
|          | new    | E      | U      | Start   | Steady  |         |
|          | u      | clipse | ptrend | new     | trend   | Eclipse |
|          | ptrend | all    | to 15  | uptrend |         | all     |
|          | to 22  | year   | in     |         | Batts   | year    |
|          | in     |        | m      | Batts   | 1-3=    |         |
|          | early  | Sun    | id-Dec | 1-3=    | LRC     | TOAR    |
|          | Jan    | angle  | 05     | LRC     |         | 453 on  |
|          |        | 49     |        |         | V/T=    |         |
|          | Batts  |        | Batts  | V/T=4/8 | 4/8     | Batt    |
|          | 1      | Steady | 1-3=   |         |         | C/D     |
|          | &2=LRC | trend  | LRC    | SA      | SA      | ratio   |
|          |        |        |        | CANT=22 | CANT=37 |         |
|          | Batt   | Batts  | V      | degs    | degs    | Batts   |
|          | 1&2    | 1-3=   | /T=7/9 |         |         | 1-3=LRC |
|          | V/T=4  | LRC    |        |         |         |         |
|          |        |        | SA     |         |         | Batts   |
|          | Shunt  | De     | C      |         |         | 1-3     |
|          | de     | graded | ANT=37 |         |         | V/T=4/8 |
|          | graded | shunts | degs   |         |         |         |
|          |        |        |        |         |         | SADE -1 |
|          | SA     | SA     |        |         |         | 7/29/05 |
|          | C      | C      |        |         |         |         |
|          | ANT=37 | ANT=22 |        |         |         | SA      |
|          | degs   | degs   |        |         |         | CANT=22 |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | E      | N      | V       | ###     | Nominal |
| *AVHRR** | ominal | rratic | ominal | ariable | Nominal |         |
|          |        |        |        |         |         | 3A-B    |
|          |        | Fr     | Rare   | No bar  | 3A-B    | switch  |
|          |        | equent | major  | codes   | switch  | D       |
|          |        | scan   | scan   | since   | enabled | isabled |
|          |        | motor  | motor  | 12 Oct. |         | 8/05/05 |
|          |        | c      | s      | Status  |         |         |
|          |        | urrent | urges. | u       |         | Channel |
|          |        | surge  | Last   | pgraded |         | 3B only |
|          |        |        |        | 1       |         |         |
|          |        | Occa   | In     | 0/18/05 |         |         |
|          |        | sional | cident |         |         |         |
|          |        | i      | 11     | TCE24   |         |         |
|          |        | magery | /18/04 | OFF     |         |         |
|          |        | bar    |        | 4/14/04 |         |         |
|          |        | codes  |        |         |         |         |
|          |        |        |        | Channel |         |         |
|          |        | Ch     |        | 3B      |         |         |
|          |        | annels |        | only.   |         |         |
|          |        | 2&4    |        |         |         |         |
|          |        | APT    |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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  | misal   | dow     |
|          | /23/05 | Occa   | Since  | radi    | ignment | 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  |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | Nominal |
|  MHS/MIU |        |        |        |         |         |         |
|          |        |        |        |         |         | Space   |
|          |        |        |        |         |         | View=0  |
+----------+--------+--------+--------+---------+---------+---------+
| **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       |         |
|          |        |        | T      |         | 0/29/03 |         |
|          |        |        | hermal |         |         |         |
|          |        |        | dow    |         |         |         |
|          |        |        | ntrend |         |         |         |
|          |        |        | ended  |         |         |         |
|          |        |        | 10 Oct |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N18 |
|          | *N12** | *N14** | *N15** |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

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

NOAA-14: Recent N14 AVHRR imagery is mostly clean, although there are
still instances of "bar codes". The scan motor

continues to experience very frequent scan motor current surges which
affect synch delta and ultimately imagery. However, AVHRR imagery is
often nominal. This higher than expected percentage of nominal N14 HRPT
images can probably be attributed to the MIRP rephase enable operation
that now occurs on N14 every orbit over the South Pole. See illustration
1.

Power balance remains a significant concern on N14. At the present time,
EMOSS power engineer is trying to balance the power situation by
manipulating two mutually exclusive objectives. The first and most
important objective is to reduce shunt load stress which is best done by
reducing power generation through solar array offset increases. If shunt
stress is not reduced, a bus over-voltage situation could result (as it
once did in April of 2003) resulting in autonomous spacecraft safing
routines (mode controller and boost regulator swaps) executing.
Conversely, reducing shunt stress tends to result in less than optimum
battery charging and lower battery voltages which then increase the
potential for a battery UNDERvoltage situation (load sheds) autonomously
executing. Unfortunately, the difference between one or the other of
these two events occurring is approximately 75-100 watts, the amount of
a single light bulb. One 17 Nov, the V/T levels on all 3 N14 batteries
were changed from 6/9, 7/8, 6/9 to 7/9, 8/9, 7/9. Subsequent analysis
revealed that this change was not sufficient at reducing shunt stress
therefore, on 22 Nov at 13:50z the battery V/T curves were commanded
back to their original 6/9, 7/8, 6/9 settings and the solar array offset
was decreased to -50 degrees (from -45) in order to reduce power
generation and reduce shunt loading. Since the batteries were just
making full charge at -45 degrees, the concern now is whether or not
they will even reach full capacity at this new offset. Analysis is as
continuous as the 2-3 passes per day allow and additional
reconfigurations can be anticipated. See illustrations 2 and 3.

No further effort has gone into planning the MSU end of life "tilt test"
on N14 that has been addressed in previous Weekly Reports although the
power reconfiguration operations in recent days have fulfilled one
perquisite for such a test. That prerequisite is determining where the
"edge" of power balance lies on N14. Recent analysis has shown that
under the present EPS configuration, the spacecraft is already on that
edge.

NOAA-15: N15 VTX-1 (APT data) remains off because of an RF conflict with
N12 and will remain off until 13 Dec. Otherwise, all N15 subsystems were
nominal relative to recent performance during the past week. See
illustrations 4 and 5 for graphical depictions of selected payload and
ADACS performance.

NOAA-16: The N16 AVHRR scan motor current reached near nominal values
during the past week and appeared to stabilize in

that range while synch delta has also markedly improved in the past week
or two. Imagery also appeared to be generally nominal with no bar codes
or MIRP rephase frame losses during the entire week. However, despite
the scan motor improvement and stability, HRPT wave patterns still
persist at times, possible because the scan motor current does often
"breech" the transitional area between fully nominal and wave pattern
values. One other item of note on N16 AVHRR is that numerous components
are at all time high temperatures. This situation is partly by design
because the AVHRR TCE (24) was turned off in order to warm the
instrument somewhat. It is now as warm as it has ever been although
baseplate and scan motor temps remain several degrees below the
threshold where TCE24 is supposed to be commanded back on (from the
ground). The EMOSS instrument engineer has been investigating this
thermal situation and has been informed that it is not at this time a
reason for concern. See illustrations 6 and 7.

The N16 ADACS subsystem remains stable after the gyro 1 failure on 24
October while "cleanup operations"

continued. As addressed in an Event Report (SER-05-P462) generated by
EMOSS C&CS Engineer, "On 17 Nov 2005, the SOCC uplinked new gains for
the reduced gyro roll estimation filter. The gains were developed after
reduced gyro performance was reviewed. NOAA-16 has been in an Estimate
Roll (Y) attitude algorithm since gyro 1 was turned off on Oct 24^th^,
2005. The signal from the earth sensor was noisier than expected (as
compared to NOAA-15's reduced gyro testing of last year). Filter
performance using the initial gain set produced excessive noise in
derived rate roll rate, causing the command Y-RWA torque signal to
periodically saturate to the maximum value ***[(see figure
1).]{.underline}*** Attitude performance still met pointing
specifications but there were questions about long term health of the
attitude

control subsystem. These new gains for the filter were created by LMSSC
and uplinked to the control CPU and an improvement immediately resulted.
The new gains reduced the commanded torques significantly, lowering the
average wheel motor currents and reducing the wheel bearing temperature
fell by more than 4.5 degs C ( to 20 degrees). N16 remains in the
estimate roll reduced gyro algorithm, and is expected to remain so
permanently. The new filter gains improved roll attitude performance and
will be analyzed to verify stability and long term health. The filter
was only installed on the control CPU in case of instability. If the new
gains threatened attitude performance, a switch of control to the backup
CPU (which still had the old gain values) would have maintained
spacecraft attitude. Once performance has been analyzed and determined
suitable to current operational health, the updated gains will also be
uplinked to the backup CPU." See illustrations 8 and 9.

Otherwise N16 was generally nominal with the AMSU's performing in a
nominal and stable manner but the HIRS filter motor current again edging
up to equal its all time high value (illustrations 10 & 11)

NOAA-17: On 20 Nov, at 10:31Z, the N17 spacecraft apparently collided
with some as yet undetermined space object. This

conclusion was reached by engineering because at that time, numerous
spacecraft attitude control component values (Rwheel speeds and motor
currents, calculated rates, attitude errors and momentums, etc.) along
all 3 axis' suddenly surged to extreme levels. By degree of severity,
this event affected Yaw the most, then Pitch while Roll was only
(relatively) slightly impacted. The severity of the yaw impact was so
significant (Yaw error angles as high as +4 to as low as -6 degrees
compared to a typical value of less than +/- 0.1) that the X-wheel which
controls Yaw surged 6 degrees C within a few minutes while its motor
current pegged out at 3.5 amps. Eventually, this wheel actually went
non-linear for several seconds at 10:34:30z the first such occurrence on
any N17 reaction wheel since launch. At 10:42z a yaw unloading using
Roll Yaw Coil #1 occurred. However, spacecraft momentum at the
conclusion of this unload remained so great that flight software
intervened at 10:43z and autonomously swapped out RY Coil #1 for the
backup RY Coil #2. At 11:04z the next unload occurred while the
spacecraft was being monitored over Barrow with the backup coil driving
the operation and a miscompare flag on the Coil in use (among others)
flagging the controllers of the problem. At this point controllers
notified engineering of the problem. Engineers arrived at the SOCC but
were unable to monitor any relevant data because no recorder dump had
occurred at Barrow and N17 had just entered its daily blind. At 14:45z,
the spacecraft exited the blind and engineering was able to review data
from the time in question. By this time, the spacecraft attitude
situation was back to near nominal. Therefore, all that was left to
accomplish was to switch back to the primary RY Coil and re-enabled RY
Coil switching. These commands were implemented at a Wallops pass at
16:30z. Spacecraft attitude control has remained nominal ever since. See
illustrations 12-23.

An investigation has since ensued to determine the size of the object
that struck the spacecraft as well as the impact location on the
spacecraft as well as other relevant information. It is known that the
annual Leonid meteor shower peaked on 17 Nov and was ending the same day
that N17 was struck although there is no definitive proof that this was
a Leonid strike. On 21 Nov, EMOSS engineers undertook a comprehensive
analysis of the effect of this event on other subsystems and components
on N17. After generating and analyzing over 500 plots covering all N17
subsystems and most hardware components the teams conclusion is that
other than attitude, which was significantly impacted but only for a
very short duration, no other subsystem appeared to have been unduly
influenced by this event.  The most salient effect during the time of
this incident on N17 was primarily thermal, probably from the
re-orientation of the spacecraft as it tried to regain nominal attitude
as well as increased reaction wheel temperatures being conducted to
nearby components. Furthermore, almost all the thermal changes were
relatively minor (no more than a couple of counts) and most returned
back to previous equilibriums by the end of the day. Besides ADACS, the
primary subsystem impacts from this event appeared to be COMM.  One
noticeably change was the GRD AGC (which were noticeably although
perhaps not significantly, lower during passes) and GRD temps which were
slightly higher.  Another noticeable if not substantial change was STX-4
output power which was slightly lower after the event as were its
temps.  There were also some minor influences on the power subsystem
primarily because the changes in so many thermal profiles might have
changed heater operational cycles (among other things).   The payloads
suite, besides some thermal changes also appear to have not been
impacted by this event in any way and no reports were received by EMOSS
engineers regarding product problems.  The investigation is ongoing with
a wide scope of involvement already underway.

NOAA-18: In performing analysis on N18 EMOSS engineers detected that the
Pitch torque coils had not been active in recent

days.  After looking further it was determined that the last time the
pitch coil had performed an unload of the Z-(pitch) wheel was late on 1
Nov.  This was something not seen before on any POES spacecraft since
before the year 2000.  Since that time, all other spacecraft (including
N18 up until 1 Nov) have always unloaded pitch multiple times every
day.  EMOSS ADACS engineer performed additional analysis and determined
that the Z-wheel, over the course of the last couple of weeks, has
transitioned from a negative speed to a positive speed, and, as it
transitioned, it remained within non-unload values. (Note: Z-axis
momentum has correspondingly shifted from positive to negative) 
Engineers have seen this before (but not in a long time) and believes
there are no negative implications to attitude control or spacecraft
health although unsure of the reason for this shift.  Additional
analysis is being performed and an Event Report will be generated on
this situation (see illustration 24). Otherwise N18 performed nominally
during the past week.

![](media/image1.png){width="8.125in" height="6.888194444444444in"}

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

(The large current spikes continue affecting the scan motor. At times
the value is nominally within the 150 mAmps range. It just hasn't been
able to stabilize there. Imagery is sometimes bar coded and sometimes
nominal. It is probable that most nominal images are a result of the
MIRP rephases enable operations that are conducted once per orbit over
the South Pole rather than once per day as was previously the case.

![](media/image2.png){width="7.875in" height="6.050694444444445in"}

Illustration 2: N14 Power Analysis part 1

(The VT change of 17 Nov appears to have not been effective at reducing
shunt stress. Depicted in this plot is the 12 hour period immediately
following the VT change.)

![](media/image3.png){width="8.375in" height="6.435416666666667in"}

Illustration 3: N14 Power Analysis (part 2)

(It appears that the Array Move \[SA\] and VT change \[VT\] on 22 Nov
may have improved the power balance situation. Next week should tell the
tale more thoroughly.)

![](media/image4.png){width="8.375in" height="6.159027777777778in"}

Illustration 4: N15 Payload Analysis

(Nominal and stable, just like last week.)

![](media/image5.png){width="8.375in" height="6.386805555555555in"}

Illustration 5: N15 ADACS Analysis

(Nominal and stable, relatively, just like last week.)

![](media/image6.png){width="8.375in" height="6.454861111111111in"}

Illustration 6: N16 AVHRR Analysis

(Scan motor current and synch delta looking good although thermal
situation is at a new high for many components which is not considered a
cause for concern at this time.)

![](media/image7.png){width="7.875in" height="6.75in"}

Illustration 7: N16 AVHRR Imagery Analysis

(No bar codes or MIRP rephase frame losses but wave patterns persist. )

![](media/image8.png){width="8.125in" height="6.24375in"}

Illustration 8: N16 ADACS Analysis (part 1)

(Much improved since uplinking new gains for the reduced gyro roll
estimation filter)

![](media/image9.png){width="8.25in" height="6.067361111111111in"}

**ILLUSTRATION 9: N16 ADACS Analysis (part 2)**

(Also improved since uplinking new gains for the reduced gyro roll
estimation filter)

![](media/image10.png){width="8.125in" height="6.24375in"}

**ILLUSTRATION 10: N16 AMSU Health**

(Everything generally stable and relatively nominal)

![](media/image11.png){width="8.375in" height="6.435416666666667in"}

Illustration 11: N16 HIRS Analysis

(Generally stable but filter motor current recently equaled an all time
high.)

![](media/image12.png){width="8.375in" height="6.40625in"}

Illustration 12: N17 ADACS Health Analysis

(The red X indicates the time when the spacecraft collision occurred
which had no impact on these two values.)

![](media/image13.png){width="8.25in" height="6.358333333333333in"}

Illustration 13: N17 Collision Analysis In Perspective

(Pull back to show what a normal 10 days of history looks like. X
indicates where the collision occurred.)

![](media/image14.png){width="8.375in" height="6.454861111111111in"}

Illustration 14: N17 Collision Analysis

(Moving in closer to primarily show how everything returned back to
normal within a day.)

![](media/image15.png){width="8.25in" height="6.3493055555555555in"}

**[Zoom in on the critical 16 minutes]{.underline} [Zoom in on the day
in question]{.underline}**

Illustration 15: N17 ADACS Gyro Filtered Data & Torque Collision
Analysis (zoom in and out)

(As the plots on the left show most of the problem had already begun to
resolve itself by before the spacecraft even reached its next support at
11:03z. Hence the absence of any limit flags during that support. )

![](media/image16.png){width="8.375in" height="6.445833333333334in"}

Illustration 16: N17 RWheels Health During Collision Day

(Everything returned quickly back to normal.)

![](media/image17.png){width="8.375in" height="6.4215277777777775in"}

Illustration 17: N17 RWheels during the critical half hour before
problem was discovered.

![](media/image18.png){width="8.25in" height="6.291666666666667in"}

**[Zoom in on the critical 16 minutes]{.underline} [Zoom in on the day
in question]{.underline}**

Illustration 18: N17 ADACS Error Angles and Calculated Rates Analysis
(zoom in and out)

(As the plots on the left show most of the problem had already begun to
resolve itself by before the spacecraft even reached its next support at
11:03z. Hence the absence of any limit flags during that support. )

![](media/image19.png){width="8.375in" height="6.363194444444445in"}

Illustration 19: N17 ADACS Analysis on Collision Day

(Other than the Coil swap, not much impact.)

![](media/image20.png){width="8.5in" height="6.551388888888889in"}

Illustration 20: N17 CPU-B Telemetry Changes From Collision (part 1)

(No change since last week or month.)

![](media/image21.png){width="8.5in" height="6.550694444444445in"}

Illustration 21: N17 CPU-B Telemetry Changes From Collision (part 2)

(That's all there was.)

![](media/image22.png){width="8.25in" height="5.540277777777778in"}

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Illustration 22: N17 LAC Imagery Analysis Relative to Collision (before
and slightly after)

(Looks no different)

# ![](media/image23.png){width="5.996527777777778in" height="7.5055555555555555in"}

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Illustration 23: N17 GAC & HRPT Imagery Analysis Relative to Collision

(GAC image contains the time period when the collision occurred. No
obvious problem. HRPT is first image after the blind by which time
attitude was basically nominal.)

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# ![](media/image24.png){width="8.375in" height="6.514583333333333in"}

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Illustration 24: N18 Transition to Positive Wheel Speeds and Negative
Momentum

(Pitch-Z axis affected. Pitch unloading in the top plot depicted by PTC
coil current.)