**POLAR Spacecraft Status As of: Tues, 20 Dec 05, 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     |
|          |        | Very   | Gyro   | Off     | ch      |         |
|          |        | low N2 | cha    | 1       | ans=AAB | M       |
|          |        | gas    | ns=AAB | 0/24/05 |         | omentum |
|          |        |        |        |         | Gyro-2  | shift   |
|          |        |        | N2 Low | Gyro-3  | TOAR    | tra     |
|          |        |        | PSI    | Off     | 451     | nsition |
|          |        |        | i      | 6/10/04 |         | started |
|          |        |        | nvalid |         | P       | 1 Nov   |
|          |        |        |        | Gyro    | ossible | ended   |
|          |        |        |        | chans   | hy      | 18 Nov. |
|          |        |        |        | XA-ZB   | drazine |         |
|          |        |        |        |         | leak    |         |
|          |        |        |        | TOAR    | TOAR    |         |
|          |        |        |        | 454     | 455     |         |
|          |        |        |        |         |         |         |
|          |        |        |        | Pitch   | N       |         |
|          |        |        |        | wheel   | ULS/Gas |         |
|          |        |        |        | bias    | enabled |         |
|          |        |        |        | change  | 16 Dec  |         |
|          |        |        |        | 16 Dec  | at      |         |
|          |        |        |        |         | 18:00   |         |
+----------+--------+--------+--------+---------+---------+---------+
| **RXO**  | PRI    | PRI    | PRI    | PRI     | PRI     | PRI     |
|          |        |        |        |         |         |         |
| All      | BU     | BU     | daily  | Daily   | Daily   | No      |
| clocks   | random | random | bias   | Bias    | Bias    | daily   |
| except   | e      | e      | -8 mS  | --5.5   | --3 mS  | bias    |
| N12 to   | nables | nables |        | mS      |         |         |
| have     |        | daily  | +100   |         |         |         |
| updates  | daily  | bia    | mS     | -100 mS |         |         |
| 31 Dec   | 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 ON  | I       | #2 ON   | #2 ON   |
|          |        | (no    |        | NOP/Off |         |         |
| (APT     | 137.50 | minal) | 16Dec  |         | 137.62  | 1       |
| data)    | MHZ    |        | 137    | OFF     | MHZ     | 37.9125 |
|          |        | Since  | .50mhz | since   |         | MHZ     |
|          |        | 8/2/05 |        | 1       |         |         |
|          |        |        |        | 1/15/00 |         | Swap    |
|          |        |        |        |         |         | planned |
|          |        |        |        |         |         | 4Jan    |
+----------+--------+--------+--------+---------+---------+---------+
| **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   |         |
|          | 20 up  | /22/05 | 15     | 45      | at 68   | TOAR    |
|          | to 22  |        |        |         |         | 453 on  |
|          | in     | E      | Topped | uptrend | Steady  |         |
|          | early  | clipse | out    |         | trend   | Batt    |
|          | Jan    | all    |        | Batts   |         | C/D     |
|          |        | year   | Batts  | 1-3=    | Batts   | ratio   |
|          | Batts  |        | 1-3=   | LRC     | 1-3=    |         |
|          | 1      | Sun    | LRC    |         | LRC     | Batts   |
|          | &2=LRC | angle  |        | V/T=4/8 |         | 1-3=LRC |
|          |        | 48     | V      |         | V/T=    |         |
|          | Batt   |        | /T=7/9 | SA      | 4/8     | Batts   |
|          | 1&2    | Steady |        | CANT=22 |         | 1-3     |
|          | V/T=4  | trend  | SA     | degs    | SA      | V/T=4/8 |
|          |        |        | C      |         | CANT=37 |         |
|          | Shunt  | Batts  | ANT=37 |         | degs    | SADE -1 |
|          | de     | 1-3=   | degs   |         |         | 7/29/05 |
|          | graded | LRC    |        |         |         |         |
|          |        |        |        |         |         | SA      |
|          | SA     | De     |        |         |         | CANT=22 |
|          | C      | graded |        |         |         |         |
|          | ANT=37 | shunts |        |         |         |         |
|          | degs   |        |        |         |         |         |
|          |        | SA     |        |         |         |         |
|          |        | C      |        |         |         |         |
|          |        | ANT=22 |        |         |         |         |
|          |        | degs   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | Va     | N      | V       | ###     | Nominal |
| *AVHRR** | ominal | riable | ominal | ariable | Nominal |         |
|          |        |        |        |         |         | 3A-B    |
|          |        | Status | Rare   | All     | 3A-B    | switch  |
|          |        | up     | major  | time    | switch  | D       |
|          |        | graded | scan   | low     | enabled | isabled |
|          |        | to     | motor  | scan    |         | 8/05/05 |
|          |        | Yellow | s      | motor   |         |         |
|          |        | 20 Dec | urges. | c       |         | Channel |
|          |        |        | Last   | urrents |         | 3B only |
|          |        | Fr     |        |         |         |         |
|          |        | equent | In     | No bar  |         |         |
|          |        | scan   | cident | codes   |         |         |
|          |        | motor  | 11     | since   |         |         |
|          |        | c      | /18/04 | 12 Oct. |         |         |
|          |        | urrent |        |         |         |         |
|          |        | surge  | C      | TCE24   |         |         |
|          |        |        | hannel | OFF     |         |         |
|          |        | Occa   | 3B     | 4/14/04 |         |         |
|          |        | sional | only   |         |         |         |
|          |        | i      |        | Channel |         |         |
|          |        | magery |        | 3B      |         |         |
|          |        | bar    |        | only.   |         |         |
|          |        | codes  |        |         |         |         |
|          |        |        |        |         |         |         |
|          |        | Ch     |        |         |         |         |
|          |        | annels |        |         |         |         |
|          |        | 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  | 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 c |
|          | Wheel  |        | n      | Occ     |         | hannel  |
|          | turned |        | ominal | asional |         | 1-12 no |
|          | OFF    |        | 7      | major   |         | ise TOA |
|          | 10/    |        | /12/05 | FM      |         | R 448 P |
|          | 17/02. |        |        | surges, |         | roblem  |
|          |        |        | FW     | most    |         | isolate |
|          |        |        | m      | recent  |         | d to lo |
|          |        |        | ode=Hi |         |         | ose LWI |
|          |        |        | Powr   | 12/9/04 |         | R lens  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | LW      |
|          |        |        |        |         |         | Noise   |
|          |        |        |        |         |         | i       |
|          |        |        |        |         |         | mproved |
|          |        |        |        |         |         | since   |
|          |        |        |        |         |         | 14 Oct  |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | Nominal |
|  MHS/MIU |        |        |        |         |         |         |
|          |        |        |        |         |         | Space   |
|          |        |        |        |         |         | View=0  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Invest  |
|          |        |        |        |         |         | igating |
|          |        |        |        |         |         | change  |
|          |        |        |        |         |         | in      |
|          |        |        |        |         |         | motor   |
|          |        |        |        |         |         | current |
|          |        |        |        |         |         | trend.  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Spin    |
|          |        |        |        |         |         | state   |
|          |        |        |        |         |         | anomaly |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | 16 Dec  |
|          |        |        |        |         |         | TOAR    |
|          |        |        |        |         |         | being   |
|          |        |        |        |         |         | ge      |
|          |        |        |        |         |         | nerated |
+----------+--------+--------+--------+---------+---------+---------+
| **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,     | 7 deg   |
|          | to     |        | nvalid | (AVHRR  | turned  | i       |
| TCE's    | n      |        |        | H&L)    | off     | ncrease |
|          | ominal |        | TOAR   |         | 8/26/03 | in N2   |
|          | c      |        | 432    | HIRS    | TOAR    | T       |
|          | onfigu |        |        | Filter  | 428     | hruster |
|          | ration |        | TCE2   | heater  |         | #2 temp |
|          | fol    |        | 4L&25L | turned  | CLOSED  | on 13   |
|          | lowing |        | (HIRS  | OFF     | 9/14/04 | Dec no  |
|          | 7      |        | &      | 1/18/05 | no      | other   |
|          | /25/04 |        | AVHRR) |         | cor     | coi     |
|          | U      |        | failed |         | rective | nciding |
|          | 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 was markedly improved over the past
week reverting back to a nominal scan motor

current and synch delta. N14 AVHRR imagery as reported by users was also
nominal. As a result, NOAA has upgraded the N14 AVHRR status to YELLOW.
In addition, N14 power system remained nominally within balance
(illustration 1). Planning continued on the N14 MSU "tilt test" during
the past week with risk analysis being presented to NOAA management.
Otherwise there were no changes to N14 during the past week.

NOAA-15: The N15 payload suite was nominal last week with the AVHRR
showing some minor signs of improvement after a

recent small, but significant scan motor current increase while the HIRS
remained solidly nominal (illustration 2). The AMSU's were also stable
and nominal last week as they approached the peak of this "seasons"
warming trend (illustration 3). Attitude control also remained nominal
and stable during the past week (illustration 4). Finally, the N15 RF
conflict with N12 has now ended. Therefore, N15's VTX-1 (APT data) was
turned back on at 20:00z on 16 Dec, a day later than originally planned.
The transmitter is operating nominally at this time (illustration 5).

NOAA-16: After setting a new all time low value two weeks ago, the N16
AVHRR scan motor current fell even further during the

past week (illustration 6). EMOSS discussions with the AVHRR community
(users, NASA, et al) regarding these low values resulted in a unanimous
opinion that the continued drop in current is a positive development (as
imagery and synch delta values appear to bear out at this time).
Therefore, EMOSS engineers will merely monitor the value as it continues
falling (IF it continues falling) and modify the limit proc each time it
breeches low flag values. There are, at this time, no contingency plans
for an excessively low scan motor current. Other payloads on N16 were
stable and nominal last week with the all AMSU's in a stable thermal
environment and the HIRS filter motor unchanged from last week (still
operating at relatively high filter motor currents and ranges) with no
new losses of filter wheel synch since the previous Weekly Report

As a preventative measure for the ADACS situation on N16 (two failed
gyros, Rgyro mode estimating Y-roll axis), EMOSS engineer Jon Woodward
implemented an alteration in pitch wheel bias value (adding 1500 RPM) on
15 Dec. As described by Jon in the procedure distributed to the POES
controllers: "NOAA-16's pitch RWA has had a bias added to its speed to
add stiffness to the control loop in case the final gyro fails and the
spacecraft enters gyroless control. NOAA-16 only has one gyro remaining,
and its failure would lead to gyroless control. The GYE control loop
performs much better when there is a bias added to the pitch RWA. " This
operation actually took three days to complete as the new equilibrium of
the pitch wheel (and conversely the Z-pitch momentum) was not achieved
until early on 19 Dec. Both values have since stabilized and the
operation can now be considered successfully implemented (illustration
7). This situation is similar to one that recently occurred "naturally"
with N18 when the pitch wheel "autonomously" subtracted 1000 RPM and
transitioned over several weeks in November to a negative direction (and
positive Z axis momentum). Controllers continue to monitor the special
N16 gyro page built by EMOSS engineers to ease in monitoring this
situation and will still be directed to turn on gyro-3 if gyro-2 does
fail. Otherwise, the were no changes in status or performance of the
other N16 ADACS components and the new updated Rgyro roll estimation
filter gains now in use on the spacecraft continue to have a positive
effect on the "workload" of the ADACS components (illustration 8).

NOAA-17: The N17 AMSU's were stable and nominal during the past week
(illustration 9). The N17 AVHRR was nominal but

slightly less than stable after first experiencing a small rise in scan
motor current early in the week and then falling back to nominal later
in the week (with synch delta remaining stable throughout). This is
behavior that has become somewhat of a feature with this payload in
recent months. The N17 HIRS was nominal and relatively stable although
in recent days the period monitor has become slightly less stable
although it remains within historical norms (illustration 10).

After an extensive and in-depth analysis, EMOSS analyst have devised a
new premise on the cause of the two recent N17 attitude perturbations
(on 20 Nov and 8 Dec) that have been discussed in previous weekly
reports. Beginning with the assumption that two collisions in 3 weeks
was statistically unlikely, Milts analysis led him to conclude that "the
cause of BOTH the J324 (20 Nov) and J342 (8 Dec) attitude anomalies
appears to be leaking or cracking of the hydrazine thruster valve seats.
Reviewing the data closely reveals that the REA2 (hydrazine thruster-2)
loop pipe temperature increased approx 1 deg on the 20 Nov event,
together with an increase in the REA2 inlet temperature. This explains
the large negative yaw component, while the lack of a strong roll
response may be attributed to solar array impingement, since it was
close to that quadrant during the event. For the 8 Dec event, REA4
(hydrazine thruster-4) would give the positive yaw and negative roll
observed, and the REA4 inlet temperature did indeed show an increase
coincident with the attitude change. There is no loop temperature for
REA4. There was also a drop of 1 bit on a hydrazine line pressure on 8
Dec at the same time as the attitude perturbations which put this value
at its all time low. The mechanism for the temperature increase is
transport of warmer inboard hydrazine liquid out along the supply line
to the valve as the venting occurs. Assuming this hypothesis is correct,
the primary concern becomes whether the spacecraft has already
experienced a worst-case event on 20 Nov, or if a larger venting could
occur that would saturate the momentum storage of the wheels and
possibly result in a spacecraft tumble. These are 100 lbf engines and,
although they are isolated, it is unclear how much residual propellant
could remain as hold-up after the post-injection venting (we know that
some hydrazine remains as ice after the venting process, and that once
the venting is complete the hydrazine thaws and persists in a meniscus
layer within the supply line)."

N17 (cont)

The NOAA engineering team convened a teleconference with NASA and other
interested parties on 16 Dec to discuss options to mitigate the risk of
a more significant future attitude event. One of the recommendations for
which a consensus agreement was reached was that the nitrogen gas (NULS
system) be enabled ASAP. This operation was implemented on 15 Dec at
18:00z shortly after the meeting was concluded. So far, there have been
no additional attitude events since 8 Dec. See illustration 11-17 for
graphical depictions of the information provided.

NOAA-18: On 16 Dec, at 05:12z, without warning the N18 MHS entered motor
spin state (\"turbo mode\") that resulted in a

number of MHS limits flagging during the next support at 06:30z. During
that pass, the on-duty AET detected these alarms and took corrective
steps to alleviate this situation. For approximately 6 more hours the
flywheel motor current (which recently experienced a change in trend as
outlined in this report for the past two weeks) continued to fluctuate
in a "saw tooth" manner. However, by 14:00Z the MHS appeared to be back
to nominal where it has remained up until the time of this publication
(illustration 18). EMOSS analysis into this anomaly indicated that there
was no unusual commanding activity on the spacecraft at any time prior
to the anomaly, that the spacecraft was over the South Atlantic Anomaly
region just transitioning into daylight when it occurred, and that there
was no "out of family" space activity (as determined by the N18 SEM) at
the time of the occurrence. Finally, an in-depth, system wide analysis
of the entire spacecraft was performed but resulted in no obvious
coincident change in behavior by any other component and no single event
upsets in either CPU. After a Tiger Team meeting on 19 Dec, it was
agreed that both an Event Report and a TOAR will be submitted on this
anomaly. All other payloads were nominal during the past week
(illustration 19).

While performing the system wide analysis EMOSS engineers noticed a
distinct change in the N2 thruster #9 temperature profile which abruptly
climb an average of 7 degrees C in less than one day on 13 Dec. While
there were some very minor temperature increases in some other
components at around the same time on 13 Dec (i.e. SBUV, SARR and SARP)
there was nothing that even approached the magnitude of this increase
within any other subsystem or component nor were any heater and louver
profiles (TCE's, HLT's) altered during this time. Although the thruster
9 temperature does remain within nominal ranges, this large increase has
not yet been explained although EMOSS engineers are continuing the
investigation (see illustrations 20 and 21).

Plans are currently being generated that will change the APT data stream
on N18 to VTX-1 (137.10 MHz).

MISC: On 1 Jan all POES spacecraft will experience a "leap second" that
will increase their command clock by 1000 mSecs (1 full

second). To compensate for this change as well as drift that has
occurred through the year, EMOSS will be changing all spacecraft command
clocks EXCEPT N12 on 31 Dec at 23:59z. Of the spacecraft that will have
a clock update all of them except N15 will have 1500 mSecs (1.5 seconds)
subtracted. For N15 only 500 MSecs (0.5 sec) will be subtracted. For
more information on this operation see the clock matrix (illustration
22) at the end of this report.

![](media/image1.png){width="8.125in" height="6.229861111111111in"}

**Illustration 1: NOAA-14 AVHRR & Power Balance Health Analysis**

(Both as good as they have been all year. AVHRR status upgraded to
Yellow.)

![](media/image2.png){width="8.25in" height="6.325694444444444in"}

**HIRS AVHRR**

**Illustration 2: N15 HIRS & AVHRR Health Analysis**

(Some small improvement in AVHRR scan motor, HIRS remains solid.)

![](media/image3.png){width="8.25in" height="6.325694444444444in"}

Illustration 3: N15 AMSU Health Analysis

(Nominal and stable)

![](media/image4.png){width="8.25in" height="6.325694444444444in"}

Illustration 4: N15 ADACS Health Analysis

(Nominal and stable.)

![](media/image5.png){width="8.375in" height="6.438194444444444in"}

STX VTX

Illustration 5: N15 RFS Health Analysis

(STX's are nominal and VTX is back on for the first time since 13 Nov
05.)

![](media/image6.png){width="8.25in" height="6.843055555555556in"}

**HRPT 20 Dec 05 12:00z**

**extreme zoom in**

**no wave patterns**

Illustration 6: N16 AVHRR Health Analysis

(The scan motor current \[upper left plot\] is now in "uncharted
territory" and it seems to like it there considering the response of
synch delta and the HRPT image above.)

![](media/image7.png){width="8.25in" height="6.204861111111111in"}

Illustration 7: N16 RWheel Bias Implementation Analysis

(The new equilibrium was reached early yesterday. Operation a success.

![](media/image8.png){width="8.25in" height="6.3493055555555555in"}

Illustration 8: N16 ADACS Health Analysis

(No much long term affect from the Rwheel bias change, except the small
sustained increase in Z_wheel motor current \[upper left plot, red
line\]. Otherwise the system looks stable notwithstanding its precarious
state of health.)

![](media/image9.png){width="8.25in" height="6.338888888888889in"}

Illustration 9: N17 AMSU Health Analysis

(Nominal and stable)

![](media/image10.png){width="8.25in" height="6.325694444444444in"}

**ILLUSTRATION 10: N17 AVHRR (bottom two, green plots) and HIRS (top
four black plots) Analysis**

(Something of a recent change in HIRS period monitor \[middle left
plot\] but when put into perspective \[top two plots\] doesn't seem to
be a problem. AVHRR still bouncing around a little but still within
nominal values.)

![](media/image11.png){width="8.25in" height="6.204861111111111in"}

**ILLUSTRATION 11: N17 Anomalous Hydrazine Thruster Analysis**
(X=attitude perturbation event)

(Note how the second event \[bottom plot\] resulted in a drop in
hydrazine pressure. That drop is one raw count so each raw count = 2
PSI)

![](media/image12.png){width="7.625in" height="5.7131944444444445in"}

**ILLUSTRATION 12: N17 Anomalous Hydrazine Thruster Analysis (in
perspective)**

(Three years the pressure has been generally stable or up. Something
significant \[i.e. an attitude event\] occured on 8 Dec which caused it
to go down. )

![](media/image13.png){width="8.125in" height="6.111111111111111in"}

Illustration 13: N17 Hydrazine Leak (REA Loop Pipe Temps) Analysis
(X=attitude perturbation event)

(Notice the sustained rise in thruster #2 loop pipe during the first
event \[top plot\])

![](media/image14.png){width="8.375in" height="6.298611111111111in"}

Illustration 14: N17 Hydrazine Leak (REA Inlet 1&2Temps) Analysis

(Notice the sustained rise in thruster #2 inlet during the first event
\[top plot\])

(X=attitude perturbation event)

![](media/image15.png){width="8.25in" height="6.204166666666667in"}

Illustration 15: N17 Hydrazine Leak (REA Inlet 3&4 Temps) Analysis

(Notice the sustained rise in thruster #4 inlet during the second event
\[bottom plot\]. There is no loop pipe #4 to correlate with as there was
with thruster #2)

(X=attitude perturbation event)

![](media/image16.png){width="8.375in" height="6.435416666666667in"}

Illustration 16: N17 ADACS Health Analysis

(Everything has been nominal since the last attitude event on 8 Dec, but
for how long?)

Possibly some effects of the gas on \[NULS\] operation on Jday 350.
Possibly just a coincidence.)

![](media/image17.png){width="8.375in" height="6.355555555555555in"}

Illustration 17: N17 Momentums (XYZ) for the first half of 20 Dec.

(Note how close the Z-axis \[pitch\] already is to an autonomous gas
unloading. EMOSS is recommending increasing the threshold to 50 for
Z-pitch.)

![](media/image18.png){width="8.375in" height="6.435416666666667in"}

Illustration 18: N18 MHS Before, During and After Its First On-Orbit
Anomaly

(Everything has been nominal since mid-Jday 350 right through today.)

![](media/image19.png){width="7.854166666666667in"
height="6.117361111111111in"}

Illustration 19: N18 Payload Health Analysis

(Everything has been nominal and stable last week.)

![](media/image20.png){width="8.25in" height="6.3493055555555555in"}

Illustration 20: N18 N2 Thruster Temp Analysis

(A serendipitous discovery on the abrupt thruster #9 temp \[lower left
plot, red line\] increase. While investigating MHS anomaly engineers
discovered a sharp rise in thruster #9 temp no coincident with any other
significant temperature rise on any other spacecraft component.)

![](media/image21.png){width="8.25in" height="6.348611111111111in"}

Illustration 21: N18 ADACS Health Analysis (The long view)

(Note the significance of the thruster #9 temp increase \[red line,
upper right plot\]. Otherwise subsystem looks to be in a thermal
uptrend.)

**LEAP SECOND TIP CLOCK CORRECTIONS FOR 31 Dec 05 at 23:59z**

+----------+---------+---------+---------+---------+---------+---------+
|          | NOAA-12 | NOAA-14 | NOAA-15 | NOAA-16 | NOAA-17 | NOAA-18 |
+----------+---------+---------+---------+---------+---------+---------+
| TIP      | -430    | +294    | -362    | +367    | +198    | +155    |
| Clock    | msec    | msec    | msec    | msec    | msec    | msec    |
| Error as |         |         |         |         |         |         |
| of       |         |         |         |         |         |         |
| 12/14/05 |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| Uncom    | -0.8    | +0.57   | -0.92   | +1.05   | +0.53   | +1.3    |
| pensated | ms/day  | ms/day  | ms/day  | ms/day  | ms/day  | 5ms/day |
| Daily    |         |         |         |         |         |         |
| Error    |         |         |         |         |         |         |
| Rate     |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| E        | -445    | +301    | -382    | +388    | +206    | +180    |
| stimated | msec    | msec    | msec    | msec    | msec    | msec    |
| TIP      |         |         |         |         |         |         |
| Clock    |         |         |         |         |         |         |
| Error on |         |         |         |         |         |         |
| 12/31/05 |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| E        | +556    | +1302   | +617    | +1389   | +1207   | +1182   |
| stimated | msec    | msec.   | msec.   | msec.   | msec.   | msec.   |
| TIP      |         |         |         |         |         |         |
| Clock    |         |         |         |         |         |         |
| Error on |         |         |         |         |         |         |
| 01/01/06 |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| Rec      | NO      | -1500   | -500    | -1500   | -1500   | -1500   |
| ommended | COR     | msec    | msec    | msec    | msec    | msec    |
| TIP      | RECTION |         |         |         |         |         |
| Clock    |         | via SCT | via SCT | via SCT | via SCT | via SCT |
| Co       |         |         |         |         |         |         |
| rrection |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| ETCUP    | N/A     | FFFF    | FFFF    | FFFF    | FFFF    | FFFF    |
| Data     |         | D000    | F000    | D000    | D000    | D000    |
| Words    |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+
| TIP      | +556    | -198    | +117    | -111    | -293    | -318    |
| Clock    | msec    | msec    | msec    | msec    | msec    | msec    |
| Error    |         |         |         |         |         |         |
| after    |         |         |         |         |         |         |
| Leap     |         |         |         |         |         |         |
| Second   |         |         |         |         |         |         |
| and      |         |         |         |         |         |         |
| Co       |         |         |         |         |         |         |
| rrection |         |         |         |         |         |         |
+----------+---------+---------+---------+---------+---------+---------+

ETCUP commands to be executed from stored command table @
2005/365/23:59:00 for control OBP, for non control OBP the command will
be in the schedule at any convenient time on Dec. 31(no non control
command for NOAA-14).

**Illustration 22: EMOSS response to POES spacecraft leap second
situation on 1 Jan 06**

**N17 CPU Single Event Upset Scrubs for the past week and in total**

![](media/image22.png){width="7.497222222222222in"
height="1.8854166666666667in"}

![](media/image23.wmf){width="6.871527777777778in"
height="5.475694444444445in"}

**Segment LSH MSH ER0 ER1 ER2**

  ------------- ----------- ----------- ----------- ----------- -----------
  unknown       0           0           1           0           1

  unknown2      0           0           0           0           1

  unknown3      1           1           0           0           0
  ------------- ----------- ----------- ----------- ----------- -----------

POES Engineering Contact List

[Government]{.underline}

Renee Smith-Dearing NOAA POES Constellation Lead 301-817-4117

Dong Han: NOAA, POES Payloads 301-817-4127

Micky Fitzmaurice: NOAA, POES Bus, IJPS 301-817-4016

Nicolaie Todirita (Todi): NOAA Ground Systems 301-817-4229

[EMOSS-2 Contractor]{.underline}

Jeff Devine: EMOSS POES Lead 301-817-4020

Jim Walters: EMOSS, POES Payload Engineer 301-817-4033

Carl Gliniak, EMOSS POES Power and Thermal 301-817-4207

Jim Sheperd, EMOSS POES Attitude Control 301-817-4030

Jon Woodward EMOSS, POES Flight Software C&CS 301-817-4019

Sally House EMOSS POES Payloads 301-817-4026

William Chadwick EMOSS, POES Comm and DHS 301-817-4015