**POLAR Spacecraft Status As of: Tues, 11 Jul 06, 17:00 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     | 21     | 17     | 1       | 2       | 1       |
|          | :59=AN | :10=AN | :49=AN | 5:04=AN | 2:23=AN | 3:49=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  |        | TOAR444 |         |         |
|          |        | inop)  |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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     |
|          | {.unde | {.unde | {.unde | e]{.und | e]{.und | e]{.und |
|          | rline} | rline} | rline} | erline} | erline} | erline} |
|          |        |        |        |         |         |         |
|          | RG     | Rgm    | Rg     | E       | Rgmode= | Gyro-A  |
|          | mode=M | ode=Di | mode=M | stimate | Monitor | MIMU-2  |
|          | onitor | sabled | onitor | Y-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 | Gyros-1 | Gyro    | 447     |
|          | Z      | Very   | Gyro   | & 3     | ch      |         |
|          | -Wheel | low N2 | cha    | I       | ans=AAB |         |
|          | st     | gas    | ns=AAB | nop/Off |         |         |
|          | icking |        |        |         |         |         |
|          | during | Pitch  | .      | Gyro    |         |         |
|          | tran   | Over   |        | chans   |         |         |
|          | sition | Ma     |        | XA-ZB   |         |         |
|          | t      | neuver |        |         |         |         |
|          | hrough | p      |        |         |         |         |
|          | 0 RPM  | lanned |        |         |         |         |
|          |        | for 19 |        |         |         |         |
|          |        | Jul.   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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  | -500   |         | -1500   | -1500   |
|          | daily  | bia    | mS     | -1500   | mS      | mS      |
|          | bi     | s--7.0 | 12     | mS      | 31Dec05 | 31Dec05 |
|          | as+6.5 | mS     | /31/05 | 31Dec05 |         |         |
|          | 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 | (dri    |         |         |
|          |        |        | 4      | fting?) | Analog  | Analog  |
|          |        |        | /3/03) |         | telem   | telem   |
|          |        |        |        | since   | d       | drift?  |
|          |        |        | #2 has | 4/18/05 | 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    | OFF    | OFF /   | #2 ON   | #1 ON   |
|          |        | (no    |        | INOP    |         |         |
| (APT     | 137.50 | minal) | 18Jun  |         | 137.62  | 137.10  |
| data)    | MHZ    |        | -21Jul | since   | MHZ     | MHZ     |
|          |        | Since  |        | 1       |         |         |
|          | Co     | 8/2/05 | Co     | 1/15/00 |         |         |
|          | nflict |        | nflict |         |         |         |
|          | with   |        | with   |         |         |         |
|          | N15    |        | 12     |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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      | /28/06 | /T=6/9 | /25/01 |         |         | ne}ince |
| rates,   |        |        |        | Eclipse | Eclipse | 6/6/05  |
| eclipse  | E      | Batt2  | E      | all     | all     |         |
| states   | clipse | VT=7/9 | clipse | year    | year    | Eclipse |
| and sun  | season |        | season |         |         | all     |
| angle)   | peaked | Since  | w      | Sun     | Sun     | year    |
|          | 21 Jun | 11     | aning, | Angle   | Angle   |         |
|          |        | /22/05 | peaked | 52      | at 70   | Sun     |
|          | Ends   |        | 18     |         |         | Angle   |
|          | 12 Aug | R      | Jun,   | Steady  | Steady  | 72 end  |
|          |        | educed |        | trend   | trend   | uptrend |
|          | Sun    | load 5 | Ends 1 |         |         |         |
|          | Angle  | May    | Aug    | Batts   | Batts   | Batts   |
|          | 34     | with   |        | 1-3=    | 1-3=    | 1-3=LRC |
|          | trend  | SSU    | Sun    | LRC     | LRC     |         |
|          | down   | t      | Angle  |         |         | Batts   |
|          | to 9   | urnoff | 31     | V/T=4/8 | V/T=    | 1-3     |
|          | in Oct |        |        |         | 4/8     | V/T=4/8 |
|          |        | E      | dow    | SA      |         |         |
|          | Batts  | clipse | ntrend | CANT=22 | SA      | SA      |
|          | 1      | all    | to 5   | degs    | CANT=37 | CANT=22 |
|          | &2=LRC | year   | in     |         | degs    |         |
|          |        |        | m      |         |         | BVR     |
|          | Batt   | Sun    | id-Oct |         |         | Phase   |
|          | 1&2    | angle  |        |         |         | Control |
|          | V/T=4  | at 60  | Batts  |         |         | aut     |
|          |        | steady | 1-3=   |         |         | onomous |
|          | Shunt  | trend  | LRC    |         |         | swap    |
|          | de     |        |        |         |         | 3/      |
|          | graded | Batts  | V      |         |         | 29=TOAR |
|          |        | 1-3=   | /T=7/9 |         |         | 457     |
|          | SA     | LRC    |        |         |         |         |
|          | C      |        | SA     |         |         |         |
|          | ANT=37 | De     | C      |         |         |         |
|          | degs   | graded | ANT=37 |         |         |         |
|          |        | shunts | degs   |         |         |         |
|          | PSSS   |        |        |         |         |         |
|          | t      | SA     |        |         |         |         |
|          | rigger | C      |        |         |         |         |
|          | l      | ANT=22 |        |         |         |         |
|          | owered | degs   |        |         |         |         |
|          | to     |        |        |         |         |         |
|          | 18.5   | PSSS   |        |         |         |         |
|          | on 11  | change |        |         |         |         |
|          | Jul    | plan   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | N      | N      | Nominal | ###     | Nominal |
| *AVHRR** | ominal | ominal | ominal |         | Nominal |         |
|          |        |        |        | since   |         | Channel |
|          |        | Since  | C      | mid Oct | 3A-B    | 3B only |
|          |        | 18 Feb | hannel | 05      | switch  |         |
|          |        | 06     | 3B     |         | enabled | F       |
|          |        |        | only   | TCE24   |         | requent |
|          |        | Occa   |        | OFF     | Scan    | scan    |
|          |        | sional | Recent | 4/14/04 | motor   | motor   |
|          |        | scan   | minor  |         | st      | current |
|          |        | motor  | scan   | Channel | ability | mini    |
|          |        | c      | motor  | 3B only | degra   | surge   |
|          |        | urrent | i      |         | dation? |         |
|          |        | surge  | nstabi |         |         |         |
|          |        |        | lities |         |         |         |
|          |        | 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 |         |         |         |
|          |        |        | Chan-3 |         |         |         |
|          |        |        | since  |         |         |         |
|          |        |        | 4      |         |         |         |
|          |        |        | /30/05 |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ### HIRS | O      | N      | N      | Oper    | NOMINAL | ######  |
|          | N/Inop | OMINAL | OMINAL | ational |         | ## Oper |
|          |        |        |        |         | 1 Pixel | ational |
|          | Turned | Opera  | FW     | Imagery | cross   |         |
|          | On     | tional | Abrupt | high    | track   | LW      |
|          | 4      |        | return | levels  | misali  | Chans   |
|          | /30/05 | Occa   | to     | radi    | gnment. | d       |
|          |        | sional | n      | ometric |         | egraded |
|          | for    | loss   | ominal | noise   |         | 25 June |
|          | power  | of     | 7      |         |         |         |
|          | b      | Fwheel | /12/05 | TOAR    |         | ####### |
|          | alance | synch  |        | 441     |         | # LW ch |
|          |        |        | After  | CLOSED  |         | annel 1 |
|          | Filter |        | years  |         |         | -12 noi |
|          | Wheel  |        | of     | Recent  |         | se TOAR |
|          | OFF    |        | minor  | mo      |         |  448 Lo |
|          |        |        | and    | mentary |         | ose LWI |
|          |        |        | major  | FW      |         | R lens. |
|          |        |        | c      | synch   |         |         |
|          |        |        | urrent | d       |         | Incons  |
|          |        |        | surges | ropouts |         | istent, |
|          |        |        |        |         |         | LW      |
|          |        |        | FW     | Occ     |         | often   |
|          |        |        | m      | asional |         | e       |
|          |        |        | ode=Hi | major   |         | rratic. |
|          |        |        | Powr   | FM      |         |         |
|          |        |        |        | surges, |         |         |
|          |        |        |        | most    |         |         |
|          |        |        |        | recent  |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | 12/9/04 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | Nominal |
|  MHS/MIU |        |        |        |         |         |         |
|          |        |        |        |         |         | F       |
|          |        |        |        |         |         | lywheel |
|          |        |        |        |         |         | current |
|          |        |        |        |         |         | i       |
|          |        |        |        |         |         | ncrease |
|          |        |        |        |         |         | 23 Jun  |
|          |        |        |        |         |         | big     |
|          |        |        |        |         |         | surge   |
|          |        |        |        |         |         | 25 Jun  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | again   |
|          |        |        |        |         |         | on 8    |
|          |        |        |        |         |         | Jul     |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Space   |
|          |        |        |        |         |         | View=0  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Rare    |
|          |        |        |        |         |         | Turbo   |
|          |        |        |        |         |         | an      |
|          |        |        |        |         |         | omalies |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | over    |
|          |        |        |        |         |         | SAA     |
+----------+--------+--------+--------+---------+---------+---------+
| **MSU**  | OF     | Opera  |        |         |         |         |
|          | F/Inop | tional |        |         |         |         |
|          |        |        |        |         |         |         |
|          | Turned | Scan   |        |         |         |         |
|          | off    | motor  |        |         |         |         |
|          | for    | and    |        |         |         |         |
|          | power  | a      |        |         |         |         |
|          | b      | ntenna |        |         |         |         |
|          | alance | pr     |        |         |         |         |
|          |        | oblems |        |         |         |         |
|          | 6      |        |        |         |         |         |
|          | /23/05 | EOL    |        |         |         |         |
|          |        | test   |        |         |         |         |
|          |        | p      |        |         |         |         |
|          |        | lanned |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SSU**  |        | OFF/N  |        |         |         |         |
|          |        | ominal |        |         |         |         |
|          |        |        |        |         |         |         |
|          |        | Turned |        |         |         |         |
|          |        | off 5  |        |         |         |         |
|          |        | May    |        |         |         |         |
|          |        | for    |        |         |         |         |
|          |        | power  |        |         |         |         |
|          |        | b      |        |         |         |         |
|          |        | alance |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DCS**  | N      | N      | N      | Nominal | Nominal | Nominal |
|          | ominal | ominal | ominal |         |         |         |
| RFI      |        |        |        | Pseudo  |         | DRU's   |
| inves    |        |        |        | message |         | 1-7 On  |
| tigation |        |        |        | turned  |         |         |
|          |        |        |        | on      |         | DRU8    |
|          |        |        |        | 1/5/06  |         | i       |
|          |        |        |        |         |         | nop/off |
+----------+--------+--------+--------+---------+---------+---------+
| **SARR** |        | N      | Opera  | Oper    | Nominal | Nominal |
|          |        | ominal | tional | ational |         |         |
|          |        |        |        |         | A-side  | A-Side  |
|          |        | All    | A      | Mode    |         |         |
|          |        | time   | -Side, | =AA     | All AGC | All AGC |
|          |        | high   | AGC    |         | Mode    | Mode    |
|          |        | com    | Mode   | A-side, |         |         |
|          |        | ponent |        | AGC     |         | Since   |
|          |        | temps  | 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      |
|          |        | ailure | B/W =  |         |         | May05   |
|          |        |        | 2      |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SEM**  | ON/N   | Opera  | N      | Nominal | Nominal | Nominal |
|          | ominal | tional | ominal |         |         |         |
|          |        |        |        | E-CDEM  | E-CDEM  | Elec-CH |
|          | Auto   | El     | E      | -HVPS=6 | -HVPS=2 | -HVPS=1 |
|          | nomous | ec-CH- | -CDEM- |         |         |         |
|          | reset  | HVPS=0 | HVPS=2 | P-CDEM  | P-CDEM  | 27 June |
|          |        |        |        | -HVPS=5 | -HVPS=4 | 17:00z  |
|          | 8 Jun, | Pr     | P      |         |         |         |
|          | back   | ot-CH- | -CDEM- | 27 Jun  | 27 June | Prot-CH |
|          | to     | HVPS=0 | HVPS=0 | 15:30z  | 16:00z  | -HVPS=0 |
|          | n      |        |        |         |         |         |
|          | ominal | 1 of 4 |        |         |         |         |
|          | 10     | T      |        |         |         |         |
|          | June   | scopes |        |         |         |         |
|          |        | inop   |        |         |         |         |
|          | Turned |        |        |         |         |         |
|          | on     |        |        |         |         |         |
|          | 8      |        |        |         |         |         |
|          | /30/04 |        |        |         |         |         |
|          |        |        |        |         |         |         |
|          | El     |        |        |         |         |         |
|          | ec-CH- |        |        |         |         |         |
|          | HVPS=4 |        |        |         |         |         |
|          |        |        |        |         |         |         |
|          | Pr     |        |        |         |         |         |
|          | ot-CH- |        |        |         |         |         |
|          | HVPS=0 |        |        |         |         |         |
|          |        |        |        |         |         |         |
|          | TED    |        |        |         |         |         |
|          | l      |        |        |         |         |         |
|          | evel=3 |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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       | Elec    |
|          |        | (giant |        | iffuser | tandard | tronics |
|          |        | step)  |        | inop    | Ops     | turnoff |
|          |        | ops    |        |         |         | taken   |
|          |        | sus    |        | Primary |         | out of  |
|          |        | pended |        | D       |         | STESM   |
|          |        | 1      |        | iffuser |         | sa      |
|          |        | 2/2/03 |        | dep     |         | festate |
|          |        |        |        | loyment |         | table   |
|          |        | 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      | 4/14/05 | ON,     | TCE3H   |
|          | to     |        | nvalid |         | turned  | dis     |
| TCE's    | n      |        |        | (AVHRR  | off     | playing |
|          | ominal |        | TOAR   | H&L)    | 8/26/03 | invalid |
|          | c      |        | 432    |         |         | r       |
|          | onfigu |        |        | HIRS    | AMSU-A1 | eadings |
|          | ration |        | TCE2   | Filter  | s       |         |
|          | fol    |        | 4L&25L | heater  | urvival | TOAR    |
|          | lowing |        | (HIRS  | turned  | heaters | 458     |
|          | 7      |        | &      | OFF     | on      |         |
|          | /25/04 |        | AVHRR) | 1/18/05 | 1       | su      |
|          | U      |        | failed |         | 0/29/03 | bmitted |
|          | Vtrip. |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | RCE    |         |         |         |
|          |        |        | ther   |         |         |         |
|          |        |        | mostat |         |         |         |
|          |        |        | failed |         |         |         |
|          |        |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Spac   |         |         |         |
|          |        |        | ecraft |         |         |         |
|          |        |        | t      |         |         |         |
|          |        |        | hermal |         |         |         |
|          |        |        | in     |         |         |         |
|          |        |        | dow    |         |         |         |
|          |        |        | ntrend |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N18 |
|          | *N12** | *N14** | *N15** |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-12: N12 power balance remained stable and nominal during the past
week as the N12 eclipse season began to wane

(illustration 1). The solar array offset configuration of -60 degrees
will have to be re-considered by mid-August at the latest because of the
risk of autonomous switching to YGC attitude control mode that may
result once the sun angle on the spacecraft falls below 20 degs
(predicted for 3 Sept).

To improve the margin of safety engineers implemented a change to the
power survival safestate trigger on 11 Jul at 18:15z. The new battery
voltage for triggering PSSS is 18.5, down from 18.73 previously.

The N12 X-(Yaw) Wheel continues sticking as it passes through 0 RPM and
the ADACS engineers continue investigating this behavior. Currently, the
wheel is not causing out of spec yaw errors and so immediate action is
not considered imperative.

NOAA-14: The N14 AVHRR was relatively nominal and stable last week and
power balance remained stable as well (illustration

2). Concerns about the record high value of the low pressure nitrogen
gas situation are being discussed. At the present time it is still not
known what the cause is of the slow increase in the low pressure value
which started its uptrend on early July of 2005. Among the possibilities
under discussion is the that the values are not "true". This possibility
was raised because the low pressure value on [N15]{.underline} became
invalid two years ago when 4 contiguous telemetry channels on the same
mux chip ceased reporting valid telemetry (N2 low pressure being one of
the channels on that chip.) Engineers continue to investigate. The
channels indicating the telemetry readings for the low pressure appear
to be reporting nominally. Another possibility under consideration was
that TIP drift was responsible because the low pressure trend since [11
Jul 05]{.underline} does resemble that "classic", one count at a time,
stair step pattern (while displaying minimal correlation with the N2
tanks thermal environment). However, no other analog values are showing
that same pattern so it is unlikely that TIP drift is the cause. Despite
these two possibilities being discounted the belief that the telemetry
is invalid remains. One reason for this sustained belief is that the low
pressure relief valve has in fact actually "cracked" once before (during
OV) at a value of 565 (PSI), 28 PSI [lower]{.underline} than the present
value. (Which begs the question, why has it not cracked again unless the
value is invalid?) The major concern with this issue is that the Pitch
Over Maneuver test remains scheduled for 19 Jul and if the low pressure
relief valve cracked while this operation was in progress it could
significantly complicate recovery operations and negatively impact the
tests success potential. Presently, there are no plans to perform a
"manual venting" of this component to preemptively lower the pressure
prior to the maneuver.

NOAA-15: The N15 payload suite was relatively nominal during the past
week (illustration 5) while the N15 eclipse season

continued to slowly wane, while the power subsystem remained nominal
(illustration 6). On the other hand, the N15

Z-wheel transition turnaround (from a positive speed bias to one that is
trending back toward negative again) continued

last week with the wheel continuing to stick as it passed through 0 RPM
(in either direction) with a corresponding negative impact on pitch
precision. Given its present rate of transition, EMOSS engineers are
predicting the wheel speed crossover point (where it will no longer
cross 0 RPM) will be on or about 23 July. (See illustrations 7 and 8).
Conversely, after operating with less than optimum stability over much
the past week, within the last two days, the N15 gyro-1 spin motor
current returned back to nominal (illustration 9) which is a welcome
sign given the degraded state of the N15 gyro suite.

The N15 VTX-1 (APT data transmitter) remains powered off through 21 July
because of an RF conflict with N12.

NOAA-16: The N16 payload suite was relatively nominal and stable during
the past week (illustration 10) as was the ADACS

subsystem (illustration 11 and 12) although in the past 2 days the pitch
axis has become slightly less stable as a result of a new full moon
cycle stating up. Basically, there was no change to N16 during the past
week.

NOAA-17: The N17 AMSU's (A2 and B) were nominal during the past week
while the HIRS filter motor and AVHRR scan motor continues to exhibit
less than optimum stability (illustration 13). The AVHRR scan motor
current reached a new "record high" value during its most recent "mini
surge" although, since the new high was only one count higher than
previous "ceilings", it is possible that TIP drift is the cause (TIP
drift is well established on N17). The N17 ADACS was generally nominal
and stable throughout the week as well (illustrations 14 and 15).

NOAA-18: On Friday, 7 July, engineers notified the MHS community that:
"The N18 MHS flywheel motor current continues to perform with less
stability than has been its historical norm.  In the past 2 weeks there
has been several current surges in this component including one
yesterday with a distinct, strong  uptrend in mean value also being
recorded since late June.  Conversely, today, 7 Jul, the motor current
abruptly dropped to what had previously been its nominal range.  This
type of performance is relatively erratic and generally Atypical of that
seen during most of this mission (notwithstanding the 2 turbo anomalies)
and is being brought to your attention for precautionary purposes". A
day later on Saturday, 8 July at 18:25Z (see illustration 16-18.) the
N18 MHS flywheel motor experienced a significant motor current surge
that resulted in a second record high value in as many weeks (1110
mAmps) before returning back to lower, albeit less than historically
stable values. (The scanner motor

N18 (cont)

remained stable and nominal.) This surge was also accompanied by the
critical error composite flag (QSPCRFLT) triggering although the event
did not trigger fault mode nor did there appear to be any obvious
thermal changes to any of the MHS components. After consulting with
EUMETSAT systems engineers it was determined that there was no health
and safety risk to the instrument, but that it was possible that the
instrument would put itself into fault mode if the current rose too high
(to date it has not gone too high).

In response to this situation, engineers made the following changes:
"For the FDM motor current the PACS yellow high limit was reset to
1300mA, and the PACS red high limit was set to 1500mA. These values were
chosen to be higher than anything witnessed so far, but to still be
short of the 1600mA current needed to trip the instrument into fault
mode. We modified the limits on the critical fault flags so that they
would read yellow if there was one critical fault, and red if there were
two.

While this situation may not be a cause for concern regarding the
overall health of the MHS instrument, engineers believe that the
significant reduction in historic performance stability of the flywheel
motor does not bode especially well for operations stability in the
coming weeks and months and that additional "events" are likely to
occur. In the meantime, engineers are maintaining close scrutiny over
this payload at this time. Otherwise there was little change to the
remainder of the N18 payload suite with the AMSU's and the AVHRR
performing nominally (illustration 19) and the HIRS experiencing
continued degradation in a variety of channels while its hardware
remained nominal (Illustration 20).

As part of its MHS flywheel anomaly analysis, engineers did a spectrum
analysis of the filtered GYRO rates for pitch and roll before, during,
and after the MHS flywheel motor current incident to see if any flex
modes of s/c were excited, any new frequencies showed, or present
frequencies changed in power.  No obvious observations were deducted
from this analysis.   From this one would conclude that the flywheel
motor current changed but the correction for the MHS scan antenna
momentum was maintained.  This analysis is only good to 0.5. Otherwise
the N18 attitude control subsystem was nominal and stable during the
past week (illustrations 20-21).

**Illustrations 1-4,6,7,9, 11,12,14,15,21,22: Omitted for web release**

![](media/image1.png){width="7.916666666666667in"
height="6.083333333333333in"}

HIRS AVHRR

Illustration 5: N15 Payloads Analysis.

(Relatively nominal and stable last week. AMSU motor currents and
temperature \[not depicted here\] were also stable and nominal last
week.)

![](media/image2.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 8:** N15 Wheel transition reversal analysis

(If present Rwheel trend continues \[bottom plot\] the Z-wheel should
stop going through zero RPM, and thus stop sticking and perturbating
pitch values, on or about Jday 204-23 Jul. Wheel sticking has been
significant in recent days and continues to affect pitch precision
\[upper plot\].)

![](media/image3.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 10: N16 Primary Payload Motor Current Analysis**

(Generally nominal and stable last week.)

![](media/image4.png){width="7.625in" height="5.779166666666667in"}

**AVHRR HIRS**

**ILLUSTRATION 13: N17 primary Payload Health Analysis**

(AVHRR scan motor current continues its less than stable performance,
experiencing several mini surges and reaching a new high last week
\[although since the increase was only one count more than the previous
"ceilings" this value might have been caused by TIP drift\]. The HIRS
filter motor was also slightly less stable than historical norms.
Otherwise payloads were relatively nominal, including the two remaining
operational AMSU's \[not depicted here\].)

![](media/image5.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 16: N18 MHS Health Analysis**

(Less than historically stable flywheel values \[bottom plots\]
throughout most of the past week, not mirrored by the scanner. MHS
temperatures \[not depicted here\] also did not change in any obvious
relation to the flywheel surges in the past several days nor did gyro
spin motors \[also not depicted here\].)

![](media/image6.png){width="7.833333333333333in"
height="5.583333333333333in"}

**ILLUSTRATION 17: N18 MHS Flywheel Motor Current Analysis**

(The flywheel looking significantly less stable relative to both its own
past performance and the scanner motor as well. Not considered a cause
for concern by EUMETSAT engineers but EMOSS engineers are predicting
additional realtime alarms in the coming weeks and months. )

![](media/image7.png){width="7.416666666666667in"
height="5.777083333333334in"}

**ILLUSTRATION 18: N18 MHS Flywheel Motor Current Alarm Analysis**

(A close in look at the flywheel current as compared with spacecraft bus
current during the same time period. A possible loose correlation is
apparent. )

![](media/image8.png){width="7.916666666666667in"
height="6.166666666666667in"}

**ILLUSTRATION 19: N18 AVHRR & AMSU**

(All three payloads appeared nominal and stable last week.)

![](media/image9.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 20: N18 HIRS Analysis**

(Various channels were noisy last week \[upper left plot\] while
hardware components appeared nominal and stable.)

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING July 7, 2006

  ----------- --------- ---------- ---------- ---------- ---------- ----------
  DAY/DATE    NOAA-12   NOAA-14    NOAA-15    NOAA-16    NOAA-17    NOAA-18

  FRI. 06/30  +286 msec -109 msec  -039 msec  +045 msec  -058 msec  -017 msec

  SAT. 07/01  +286 msec -107 msec  -041 msec  +046 msec  -058 msec  -014 msec

  SUN. 07/02  +280 msec -108 msec  -041 msec  +047 msec  -058 msec  -011 msec

  MON. 07/03  +282 msec -107 msec  -041 msec  +048 msec  -057 msec  -009 msec

  TUE. 07/04  +280 msec -107 msec  -043 msec  +049 msec  -054 msec  -011 msec

  WED. 07/05  +275 msec -106 msec  -043 msec  +050 msec  -053 msec  -004 msec

  THU. 07/06  +278 msec -105 msec  -043 msec  +052 msec  -051 msec  -005 msec
  ----------- --------- ---------- ---------- ---------- ---------- ----------

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

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

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

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

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

\* A clock jump of -500 milliseconds on 02/14/06 due to fractional
second daily ETCUP. A clock

> jump of +500 milliseconds on 05/01/06 due to fractional second daily
> ETCUP. Alternating +/-
>
> 500 millisecond clock jumps will ccur at 76-day intervals as long as
> fractional second daily
>
> ETCUP is utilized to manage clock drift. The next -500 millisecond
> jump is expected on 07/16/06.

\*\* TIP Clock corrections were made to compensate for the positive leap
second introduced on 12/31/05.