**POLAR Spacecraft Status As of: Tues, 27 June 06, 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     | 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 |         |         |         |
|          |        |        | 4      | since   | Analog  | Analog  |
|          |        |        | /3/03) | 4/18/05 | telem   | telem   |
|          |        |        |        |         | d       | drift?  |
|          |        |        | #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    | 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.    |
|          | +70]   | -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 & | 6/9/06 | 1&3V   | 1      | 7/16/02 | 1/29/04 | underli |
| V/T      |        | /T=6/9 | /25/01 |         |         | ne}ince |
| rates,   | Move   |        |        | Eclipse | Eclipse | 6/6/05  |
| eclipse  | to -60 | Batt2  | E      | all     | all     |         |
| states   | p      | VT=7/9 | clipse | year    | year    | Eclipse |
| and sun  | lanned |        | season |         |         | all     |
| angle)   | for 28 | Since  | w      | Sun     | Sun     | year    |
|          | Jun    | 11     | aning, | Angle   | Angle   |         |
|          |        | /22/05 | peaked | 52      | at 71   | Sun     |
|          | to     |        | 18     |         |         | Angle   |
|          | cool   | R      | Jun,   | Steady  | Steady  | 71 up   |
|          | bat    | educed |        | trend   | trend   | trend   |
|          | teries | load 5 | Ends 1 |         |         | to 72   |
|          |        | May    | Aug    | Batts   | Batts   | mid-Jul |
|          | E      | with   |        | 1-3=    | 1-3=    |         |
|          | clipse | SSU    | Sun    | LRC     | LRC     | Batts   |
|          | season | t      | Angle  |         |         | 1-3=LRC |
|          | peaks  | urnoff | 32     | V/T=4/8 | V/T=    |         |
|          | 21 Jun |        |        |         | 4/8     | Batts   |
|          |        | E      | Start  | SA      |         | 1-3     |
|          | Ends   | clipse | dow    | CANT=22 | SA      | V/T=4/8 |
|          | 12 Aug | all    | ntrend | degs    | CANT=37 |         |
|          |        | year   | to 5   |         | degs    | SA      |
|          | Sun    |        | in     |         |         | CANT=22 |
|          | Angle  | Sun    | m      |         |         |         |
|          | 35     | angle  | id-Oct |         |         | BVR     |
|          | steady | at 60  |        |         |         | Phase   |
|          |        | steady | Batts  |         |         | Control |
|          | Batts  | trend  | 1-3=   |         |         | aut     |
|          | 1      |        | LRC    |         |         | onomous |
|          | &2=LRC | Batts  |        |         |         | swap    |
|          |        | 1-3=   | V      |         |         | 3/      |
|          | Batt   | LRC    | /T=7/9 |         |         | 29=TOAR |
|          | 1&2    |        |        |         |         | 457     |
|          | V/T=4  | De     | SA     |         |         |         |
|          |        | graded | C      |         |         |         |
|          | Shunt  | shunts | ANT=37 |         |         |         |
|          | de     |        | degs   |         |         |         |
|          | graded | SA     |        |         |         |         |
|          |        | C      |        |         |         |         |
|          | SA     | ANT=22 |        |         |         |         |
|          | C      | degs   |        |         |         |         |
|          | ANT=37 |        |        |         |         |         |
|          | degs   | PSSS   |        |         |         |         |
|          |        | change |        |         |         |         |
|          |        | 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  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | 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    |        |         | Pr      | taken   |
|          |        | sus    |        | Primary | ocedure | out of  |
|          |        | pended |        | D       | changes | STESM   |
|          |        | 1      |        | iffuser |         | sa      |
|          |        | 2/2/03 |        | dep     | Fort    | festate |
|          |        |        |        | loyment | hcoming | table   |
|          |        | R      |        | problem |         |         |
|          |        | educed |        | TOAR    | Test    |         |
|          |        | oper   |        | 426     | planned |         |
|          |        | ations |        |         | for 28  |         |
|          |        |        |        | AMSU    | June    |         |
|          |        | 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 remains an issue as eclipse season (and sun
angle) has achieved maximum depth and duration.

Presently, the array offset move on 9 June appears to have stabilized
the bus voltage values which had been responsible for the two SADBIAS
solar array moves last week (driven in large part by saturated shunts).
Conversely, the position of the array has now resulted in the battery-1
pack being directly exposed to sunlight during much of its orbit thus
resulting in record high temperatures (13.25 on 26 June) with battery-2
shaded and thus thermally unaffected. Furthermore, these record high
temperatures in conjunction with the very high offset (+70 degs) may
slowly be "starving" the charge state of the batteries thus resulting in
increasing lower voltages by the end of the eclipse portion of the
orbit. (Although this configuration has been beneficial at reducing
shunt loading and stress, a major consideration as well.) Extrapolation
analysis performed indicated that there is a possibility that the
temperature may continue to slowly increase for as long as 1-2 more
weeks which, if it exceeds 15 degs C would trigger the first of four
autonomous safing procedures (a "benign switch" to VT level 4, the
present VT setting for each battery). Given the present uptrend,
engineers consider it unlikely that the temperature will rise to the
second battery thermal safing trigger which occurs at 21 degs C and
results in an autonomous switch to trickle charge. Unlikely though it
appears, such a situation could have a devastating effect on the power
subsystem because it would almost certainly lead to an autonomous under
voltage power survival safestate situation which could then be followed
shortly thereafter by a potential "destruction" of the spacecraft
shunts. Given that this spacecraft is only support AT BEST once per day,
EMOSS engineers believe a spacecraft reconfiguration might is in order.
Among the possible reconfigurations that were analyzed by the team were:

1)  Moving the solar array offset to -60 degrees. This would provide
    significant shade to battery-1 and bring down its temperature down
    while simultaneously improving the battery low voltage and charging
    situation without negatively impacting shunt loading. Concerns that
    going back to a negative (vs. positive) SA offset could result in
    sun sensor shading and possibly an autonomous switch to YGC attitude
    control mode will not be a problem until the sun angle falls below
    21 degs which should not occur until the beginning of September
    while N12 eclipse season ends on or about 12 Aug.

2)  Lower the PSSS trigger on battery-1 to 18.5 volts from its present
    18.73 trigger (battery now reaching as low as 19.35 with very few
    transmitter and recorder on operations helping keep the voltage
    higher than it would otherwise be).

3)  Change flight software to trigger thermal safing at higher
    temperatures or disable thermal safing altogether.

4)  Adjust the PMS software actions that occur during battery thermal
    safing.

In determining the risk-benefit of each option, the team recommended to
NOAA management that the big array move be implemented because it will
take care of all problems at once, albeit only through eclipse season.
This reconfiguration was approved by NOAA and is planned for Weds, 28
June at 10:15z. Once the eclipse season begins to wane significantly in
the first or second week of July, the risks for N12 power subsystem will
change and all configurations will have to be reassessed. By the end of
eclipse season in mid-August, the array will probably have to be
configured back to +60 to prevent sun sensor shading. (See illustrations
1 & 2)

Engineers are investigating of the sticky behavior of the N12 X-Yaw
wheel as it passes through 0 RPM (see lasts weeks report). Currently,
the wheel is not causing out of spec yaw errors and so immediate action
is not considered imperative. Any action taken to influence the yaw RWA
would also affect the roll (Y) RWA because of the interrelationship
between Yaw and Roll axes, and this would have to be considered as well.
The roll RWA also sticks while changing directions, but for much shorter
periods because the transition happens much more quickly than with the
yaw RWA. There have never been noticeable roll transients as a result of
Y RWA sticking. There has also been negligible effect on the yaw updates
that sometime take place when the X RWA is stopped.

NOAA-14: The AVHRR scan motor & synch delta is showing slightly less
stability than in previous months but both remain

within nominal imagery ranges. The N14 battery voltages were stable to
slightly higher during the dark part of their orbit, staying above 20
volts for most of the past 5 days while shunt loading remained well
below maximum. Presently, the N14 power situation appears relatively
well balanced (illustration 3).

EMOSS has been concerned about the N2 low pressure value on N14 for some
time now.  In recent days it has crept up another count to the point
that it is now only 1 count away from the first potential autonomous
venting trigger (relief valve venting threshold).  Concurrently the N2
tank temp is also at a record high value which is indicative of
environmental (solar) heating that is also influencing the pressure. 

N14 (cont)

Pitch over maneuver planning has current implementation date scheduled
for 19 July. Basically all products are in place for this event and
simulations have been ongoing. A simulation of this operation that tests
a variety of potential anomalies occurred on 21 Jun at and provided
additional insight into the test execution. Additional simulations and
script "walkthroughs" are planned prior to test implementation.

NOAA-15: The N15 payload suite was relatively nominal during the past
week notwithstanding some minor instabilities in the

AVHRR scan motor current (illustration 5). The N15 eclipse season has
also begun to wane, slowly at the present time but much more quickly
next week). The power subsystem remains nominal as this transition gets
underway (illustration 6).

On 21 June, engineers detected unusually large pitch errors on N15
coupled with a lack of Pitch Torquer coil usage.  These errors appears
to be caused by the Z-reaction wheel (pitch) sticking as it crosses
through 0 RPM from a negative to a positive speed (or vice versa) just
like it occurs on N12.   Since launch, the N15 pitch wheel has operated
at a negative speed.  In early June it began to transition, much like
N18 has done twice since launch, to the opposite speed (while pitch
momentum does the opposite).  As of 21 June, the speed began to cross
through 0 RPM for the first time.  As the wheel speed crosses through 0,
it typically sticks, sometimes for as long as 3-4 minutes.  The longer
it sticks, the larger the pitch error that occurs.  This situation is
expected to continue until the wheel speed achieves complete positive
RPM crossover; the point at which it no longer falls below zero, and
always remains positive. EMOSS engineer Jeff Devine has extrapolated the
slope of change of this transition and has predicted that this crossover
point should occur on or about 5 July. Until that time, large, out of
spec pitch errors can be expected to occur on a daily basis. The
implications of this situation on products are not well understood by
EMOSS engineers but IPD has been notified of this transition and its
effects on pitch. The present consensus among EMOSS engineers is that
this situation is primarily a "nuisance" to operations but not anything
to become overly concerned about. Preventing this situation from
occurring during the next 6 days is possible by implementing a new
positive Z-Wheel bias. However, given that this situation should resolve
itself in less than a week such an operation is not being recommended to
NOAA at this time. Otherwise the ADACS was generally nominal during the
past week. See illustrations 7-10.

The N15 VTX-1 (APT data transmitter) remains powered off through 21 July
because of an RF conflict with N12. This conflict is also making
supports with N12 more difficult to schedule.

NOAA-16: The N16 payload suite was relatively nominal and stable during
the past week (illustration 11). However, on 22 June

at 15:15:50z for several minutes the gyro-2 spin motor current
\"surged\" about 10mA before settling back into its

nominal profile. The surge was accompanied by short lived increase in
IMU TCA voltage (IMU block temp remained steady) and decreases in the
IMU phase voltages illustration 12). This situation has occurred several
times since gyro-1 failed so it is not necessarily a cause for concern,
as long as it returns to nominal. Regardless, because of the somewhat
\"precarious\" state of the N16 ADACS, EMOSS will continue reporting
upon each out of character performance to ensure the entire team is
cognizant that at any time we may have to go gyroless on N16. This surge
did not appear to impact any other ADACS components and the subsystem
was otherwise relatively nominal during the past week Illustration 13).

Per Janet Green request on 27 June at 15:30z, the N16 SEM TED had its
electron voltage increased from level 5 to level 6, and its proton
voltage increase from level 4 to level 5.

NOAA-17: The N17 AMSU's (A2 and B) were nominal during the past week
while the AVHRR scan motor continues to exhibit less than optimum
stability (illustration 14) as it continues experiencing frequent scan
motor current "mini surges" (although, so far, they continue to return
back to nominal). The N17 HIRS also showed some minor "perturbations" in
filter wheel current values during the past week although there have
been no reports of degraded imagery received by EMOSS nor none observed
on PIDES by EMOSS engineers. The N17 ADACS was generally nominal and
stable throughout the week (illustrations 15 and 16).

Tests for the N17 SBVUV that are scheduled for 29 June. Refer to last
weeks report for additional information on these tests.

Per user's request on 27 June at 16:00z, the N17 SEM TED had its PROTON
voltage increased by one step to Level 4 (from 3).

NOAA-18: With the exception of the MHS and some HIRS channels, the N18
payload suite was nominal and stable during the past week (illustration
17). The MHS flywheel motor on the other hand experienced a change in
operational profile that

started on 23 June and climaxed with its highest ever motor current
value on 25 June. Since the major surge, the current has come back to
the higher levels that started on 23 June. Engineers investigating found
the following: "The FDM current began rising early on day 174.  Over a
day and a half it rose from around 730 mA to about 760 mA.  After that
it had two relatively short surges of higher currents, but was

otherwise stable.  The limit violation logged in the shift report was
during the larger of these two events, which reached a maximum value of
about 1080 mA.  The smaller surge was less than 900 mA.  The Reflector
Drive Motor (RDM) current was stable throughout the entire period of the
FDM anomaly.  Normally the FDM current should follow the

RDM current.  There is no sudden jump or similar event which allows us
to precisely determine when the current began to rise and there were no
changes in the FDM temperature, the scan core temperature or the scan
housing temperature nor where there any changes in the FDM Scan Control
Electronics temperature.  None of the MHS fault flags have been set.
Unless otherwise directed by EUMETSAT, we have no plans for further
action." Illustrations 18 and 19 depict the motor currents and a variety
of other thermal MHS telemetry. However, due to noise spikes created by
ABE throughout each plot, analyzing the data can be somewhat
problematic.

After spending a week with nominal values, the N18 HIRS long wave
channels (and several others as well) again degraded starting on 25
June. This degradation has impacted imagery and is similar to the many
other times this situation has occurred (illustrations 21-23).
Otherwise, the HIRS hardware still appears to be performing nominally
(illustration 24) although the payload remains Yellow in status. The N18
ADACS was generally nominal during the past week although it did
experience some minor instability on JDAY 174 due to sun-moon incursions
(illustration 25). Finally, the N18 XSU PL voltages are exhibiting a
similar TIP drift masking behavior that was seen on N16 (illustration
26). What is occurring is that the XSU PL voltages are trending
downward, against the direction of their TIP drift (which is, of course,
upward). When discovered on N16 (after the TIP was swapped) EMOSS
generated a TOAR. The TOAR board has indicated that this is not a
significant cause for concern on N16 and, since N18 is displaying a
"shallower" trend than N16 did, N18's downtrend is not presently
considered a reason for concern at this time either.

Per user's request on 27 June at 17:00z, the N18 SEM TED had its
electron voltage increased by one step to Level 1 (from 0).

![](media/image1.png){width="7.916666666666667in" height="6.0in"}

**Illustration 1: NOAA-12 Power Analysis**

(Shunts are in reasonable health \[upper left\] but battery temperatures
continue to rise and voltages continue to fall necessitating a solar
array move on 28 Jun at 10:15z to -60 deg offset (from +70) which will
remain in place through early August at a minimum.)

![](media/image2.png){width="7.573611111111111in" height="4.66875in"}

**Illustration 2: NOAA-12 Sun Angle Analysis**

(Above images depict how the sun shines on the battery-1 pack given a 35
degree angle with a +70 degree offset \[left image\] causing it to heat
up but is shaded if the array offset is -60 \[right image\]. Hence the
motivation for tomorrows array move.

![](media/image3.png){width="7.916666666666667in"
height="6.166666666666667in"}

Illustration 3: N14 Payload and EPS Analysis (cont)

(AVHRR \[two bottom plots\] showing some minor instabilities while power
balance \[top 4 plots\] indicate a more optimized situation than has
been the case in many months. )

![](media/image4.png){width="7.916666666666667in"
height="6.083333333333333in"}

Illustration 4: N14 Nitrogen Fuel Analysis

(One count away from [possibly]{.underline} triggering an autonomous
venting. On the positive side, the sun angle has topped out and should
begin to trend lower within a week to 10 days.)

![](media/image5.png){width="7.916666666666667in"
height="6.083333333333333in"}

Illustration 5: N15 Payloads Analysis.

(Relatively nominal and stable last week although slightly less so on
the AVHRR \[upper plots\].)

![](media/image6.png){width="7.916666666666667in"
height="6.166666666666667in"}

Illustration 6: N15 EPS Health Analysis

(As can be detected within several of these plots, eclipse season is
waning on N15 and the subsystem appears nominal.)

![](media/image7.png){width="7.916666666666667in"
height="6.083333333333333in"}

Illustration 7: N15 ADACS Health Analysis

(Generally nominal and stable last week \[wheel bearing temp drop on
JDAY 170 \[lower right plot\] is curious.)

![](media/image8.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 8:** N15 Attitude Control Analysis

(Significant pitch noise introduced on Jday 168 when Z-wheel started to
transition through zero \[and typically sticking at this transition
point\] into positive territory for the first time during this mission.)

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

Illustration 9: N15 "Sticky Wheel" Analysis

(Note the significance of the attitude subsystem perturbations caused by
the wheel sticking. The longer the wheel sticks the more pronounced the
perturbation. In this instance, pitch error exceeded 0.3 degs, well
outside of nominal. Wheel direction transition into positive values
should be complete by 5 July at which time the wheel should cease
sticking.)

![](media/image10.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 10: N15 Z-Wheel and Momentum polarity shift analysis.**

(This is the first such occurrence noted of this phenomenon on N15. It
has already occurred twice on N18. Note how pitch wheel remain unused
\[top plot\] which should remain the case until 9 Aug when the polarity
shift should be completed. Once the low X-wheel speed rises above zero,
\[see extrapolation on bottom plot\] the sticking and pitch error
problems should cease.)

![](media/image11.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 11: N16 Primary Payload Analysis**

(Generally nominal and stable last week.)

![](media/image12.png){width="8.041666666666666in"
height="6.699305555555555in"}

**ILLUSTRATION 12: N16 ADACS Health Analysis**

(Relatively nominal and stable last week EXCEPT for the short lived
gyro-2 spin motor current "mini surge" on 22 June. )

![](media/image13.png){width="7.833333333333333in"
height="6.083333333333333in"}

**ILLUSTRATION 13: N16 ADACS Control Analysis**

(Relatively nominal and stable last week. The red X on each plot
indicates the time when gyro-2 motor current surged.)

![](media/image14.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 14: N17 Primary Payload Analysis**

(Generally nominal and stable during the week although it appears that
the AVHRR scan motor \[upper right plot\] was just starting to
experience another mini surge.)

![](media/image15.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 15: N17 ADACS Health Analysis**

(Relatively nominal and stable last week.)

![](media/image16.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 16: N17 Attitude Control Analysis**

(Nominal and stable last week.)

![](media/image17.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 17: N18 Primary Payload Motor Analysis**

(All, generally nominal and stable last week.)

![](media/image18.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 18: N18 MHS Analysis**

(A definite change in operational profile of the flywheel which started
on J174, 23 June and climaxed on 25 Jun with the highest motor current
yet experienced by the flywheel since the MHS was activated.)

![](media/image19.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 19: N18 MHS Health Analysis**

(Attempts to perform strategic analysis on the MHS are greatly hindered
by ABE noise spikes as is readily demonstrated in the plots above. At
the time that the flywheel was first changing its operational profile
\[Jday 174\] there were numerous DIG-A items that also appeared to spike
legitimately. Unfortunately, it is difficult to ascertain for certain.)

![](media/image20.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 20: N18 HIRS Long Wave Analysis**

(After nearly a week of generally nominal values, the long wave channels
again degraded in recent days.)

![](media/image21.png){width="7.916666666666667in" height="5.75in"}

**ILLUSTRATION 21: N18 HIRS Channel (3-11) Analysis**

(Some changes that coincided with the degradation in channel-1 and 2.
Notably channels 4, 5, 6 and 11.)

![](media/image22.png){width="7.916666666666667in" height="5.75in"}

**ILLUSTRATION 22: N18 HIRS Channel (12-20) Analysis**

(Some changes that coincided with the degradation in channel-1 and 2,
notably channel-12.)

![](media/image23.png){width="7.5in" height="5.717361111111111in"}

**ILLUSTRATION 23: N18 HIRS Imagery Analysis**

(Note the degradations.)

![](media/image24.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 24: N18 HIRS Hardware Analysis**

(Generally appears nominal and stable.)

![](media/image25.png){width="7.916666666666667in"
height="6.083333333333333in"}

**ILLUSTRATION 25: N18 ADACS Analysis**

(Generally nominal and stable notwithstanding the perturbations on JDAY
174 caused by the sun moon warning intrusions.)

![](media/image26.png){width="7.416666666666667in"
height="5.6194444444444445in"}

**ILLUSTRATION 26: N18 XSU PL Comparison Analysis**

(N18 XSU PL voltages are showing a similar, though less pronounced
downtrend while its analog values are actually drifting upward thereby
masking the actual extent of the downtrend. Although a TOAR was written
against N16 after the TIP swap revealed the extent of the masking, this
situation is not considered a cause for concern at the present time.)

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING June 23, 2006

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

  FRI. 06/16  +303 msec -114 msec  -024 msec  +033 msec  -076 msec  -043 msec

  SAT. 06/17  +305 msec -115 msec  -026 msec  +031 msec  -076 msec  -039 msec

  SUN. 06/18  +305 msec -110 msec  -027 msec  +031 msec  -074 msec  -037 msec

  MON. 06/19  +304 msec -110 msec  -030 msec  +031 msec  -073 msec  -035 msec

  TUE. 06/20  N/A       -110 msec  -030 msec  +032 msec  -071 msec  -038 msec

  WED. 06/21  +300 msec -113 msec  -028 msec  +035 msec  -072 msec  -033 msec

  THU. 06/22  +299 msec -112 msec  -031 msec  +039 msec  -073 msec  -033 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.