**POLAR Spacecraft Status As of: Tues, 11 Apr 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     |
| X=Yaw:   | {.unde | {.unde | {.unde | e]{.und | e]{.und | e]{.und |
| gas      | rline} | rline} | rline} | erline} | erline} | erline} |
| unload   |        |        |        |         |         |         |
| mom      | RG     | Rgm    | Rg     | E       | Rgmode= | Gyro-A  |
| trigg    | mode=M | ode=Di | mode=M | stimate | Monitor | MIMU-2  |
| er=70i#s | onitor | sabled | onitor | ROLL    |         |         |
|          |        |        |        |         | Gyro-3  | Z-wheel |
| Y=Roll:  | Gyro   | Gyro   | Gyro-3 | Rgmode= | Off     | -Pitch  |
| gas      | cha    | cha    | Off    | PASSIVE | 6/10/04 |         |
| unload   | ns=XYZ | ns=XYZ | 6      |         |         | TOAR    |
| mom      |        |        | /26/00 | Gyros-1 | Gyro    | 447     |
| trigg    |        |        | Gyro   | & 3     | ch      |         |
| er=70i#s |        |        | cha    | I       | ans=AAB |         |
|          |        |        | ns=AAB | nop/Off |         |         |
| Z=Pitch: |        |        |        |         |         |         |
| gas      |        |        |        | TOAR    |         |         |
| unload   |        |        |        | 454     |         |         |
| mom      |        |        |        |         |         |         |
| trigg    |        |        |        | Gyro    |         |         |
| er=40i#s |        |        |        | chans   |         |         |
| \*       |        |        |        | XA-ZB   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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    | #1 ON  | I       | #2 ON   | #1 ON   |
|          |        | (no    |        | NOP/Off |         |         |
| (APT     | 137.50 | minal) | Turned |         | 137.62  | 137.10  |
| data)    | MHZ    |        | back   | OFF     | MHZ     | MHZ     |
|          |        | Since  | on 2   | since   |         |         |
|          |        | 8/2/05 |        | 1       |         |         |
|          |        |        |        | 1/15/00 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BTX**  | #1     | #2     | #1     | #2      | ###     | #1      |
|          |        |        |        |         | #### #2 |         |
|          | 136.77 | 137.77 | 137.35 | 137.77  |         | 137.35  |
|          | MHZ    | MHZ    | MHZ    | MHZ     | 137.77  | MHZ     |
|          |        |        |        |         | MHZ     |         |
+----------+--------+--------+--------+---------+---------+---------+
| **STX**  | 1 --   | 3 --   | 2-Omni | 2 --    | 3 --    | 1 -     |
|          | HRPT;  | HRPT   | HRPT   | HRPT    | HRPT    | HRPT    |
| 1 = rcp  |        |        |        |         |         |         |
| 1698.0   | 2,3 -  | 2, 1   | 2      | 1--     | TOAR424 | 3 -     |
| mhz      | Pl     | --     | om     | P       | low     | P       |
|          | ayback | Pl     | ni=rcp | layback | power   | layback |
| 2 = lcp  |        | ayback |        |         |         |         |
| 1702.5   |        |        | Power  | 4 --    | 2 & 4   | 2-P     |
| mhz      |        |        | Drop   | P       | P       | layback |
|          |        |        |        | layback | layback |         |
| 3= rcp   |        |        | TOAR   |         |         | 4-Test  |
| 1707.0   |        |        | 446    | & MCM   | 1-      | &       |
| mhz      |        |        |        | usage   | Standby | Standby |
|          |        |        | 4-Pl   |         |         |         |
| 4= rcp   |        |        | ayback | 3 low   | STX-1   |         |
| 2247.5   |        |        |        | power   | Power   |         |
| mhz      |        |        | 1,     | unused  | drop    |         |
|          |        |        | 2,3-De |         | TOAR    |         |
|          |        |        | graded |         | 443.    |         |
+----------+--------+--------+--------+---------+---------+---------+
| #        | [Ar    | [Array | [Array | [Array  | [Array  | [Array  |
| ## POWER | rayOff | Off    | Off    | Off     | Off.    | Off.    |
|          | +60]   | -50]   | -45]   | -4      | --4     | -4      |
| (Array   | {.unde | {.unde | {.unde | 0]{.und | 0]{.und | 0]{.und |
| offset   | rline} | rline} | rline} | erline} | erline} | erline} |
| and CANT |        |        |        |         |         |         |
| angle,   | since  | Batts  | Since  | Since   | Since   | [S]{.   |
| charge & | 6      | 1&3V   | 1      | 7/16/02 | 1/29/04 | underli |
| V/T      | /23/05 | /T=6/9 | /25/01 |         |         | ne}ince |
| rates,   |        |        |        | Eclipse | Eclipse | 6/6/05  |
| eclipse  | Full   | Batt2  | Full   | all     | all     |         |
| states   | Sun    | VT=7/9 | Sun    | year    | year    | Eclipse |
| and sun  |        |        |        |         |         | all     |
| angle)   | Sun    | Since  | Sun    | Sun     | Sun     | year    |
|          | Angle  | 11     | Angle  | Angle   | Angle   |         |
| Sun Moon | 25     | /22/05 | 20     | 57      | at 68   | Sun     |
| eclipse  | u      |        |        |         |         | Angle   |
|          | ptrend | E      | New    | Steady  | uptrend | 66 up   |
| occurred | to 35  | clipse | u      | Trend   | to 71   | trend   |
| for all  | in     | all    | ptrend |         | at end  | to 72   |
| sp       | mi     | year   | to 32  | Batts   | of May  | mid-Jul |
| acecraft | d-June |        | in     | 1-3=    |         |         |
| 29 Mar.  |        | Sun    | mi     | LRC     | Batts   | Batts   |
|          | Batts  | angle  | d-June |         | 1-3=    | 1-3=LRC |
| No       | 1      | 54 up  |        | V/T=4/8 | LRC     |         |
| sig      | &2=LRC | trend  | Batts  |         |         | Batts   |
| nificant |        | to 60  | 1-3=   | SA      | V/T=    | 1-3     |
| impact.  | Batt   | in     | LRC    | CANT=22 | 4/8     | V/T=4/8 |
|          | 1&2    | June   |        | degs    |         |         |
|          | V/T=4  |        | V      |         | SA      | SA      |
|          |        | Batts  | /T=7/9 |         | CANT=37 | CANT=22 |
|          | Shunt  | 1-3=   |        |         | degs    |         |
|          | de     | LRC    | SA     |         |         | TOAR    |
|          | graded |        | C      |         |         | 453 on  |
|          |        | De     | ANT=37 |         |         |         |
|          | E      | graded | degs   |         |         | Batt    |
|          | clipse | shunts |        |         |         | C/D     |
|          | season |        | E      |         |         | ratio   |
|          | starts | SA     | clipse |         |         |         |
|          | 29 Apr | C      | season |         |         | [Closed |
|          |        | ANT=22 | starts |         |         | 4/11/0  |
|          | SA     | degs   | m      |         |         | 6]{.und |
|          | C      |        | id-May |         |         | erline} |
|          | ANT=37 | PSSS   |        |         |         |         |
|          | degs   | change |        |         |         | BVR     |
|          |        | plan   |        |         |         | Phase   |
|          |        |        |        |         |         | Control |
|          |        |        |        |         |         | aut     |
|          |        |        |        |         |         | onomous |
|          |        |        |        |         |         | swap    |
|          |        |        |        |         |         | 3       |
|          |        |        |        |         |         | /29TOAR |
|          |        |        |        |         |         | s       |
|          |        |        |        |         |         | ubmited |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | Va     | N      | Nominal | ###     | Nominal |
| *AVHRR** | ominal | riable | ominal |         | Nominal |         |
|          |        |        |        | since   |         | Channel |
|          |        | Occa   | C      | mid Oct | 3A-B    | 3B only |
|          |        | sional | hannel | 05      | switch  |         |
|          |        | scan   | 3B     |         | enabled |         |
|          |        | motor  | only   | TCE24   |         |         |
|          |        | c      |        | OFF     | scan    |         |
|          |        | urrent | Recent | 4/14/04 | motor   |         |
|          |        | surge  | minor  |         | current |         |
|          |        |        | scan   | Channel | mini    |         |
|          |        | Ch     | motor  | 3B only | surges  |         |
|          |        | annels | i      |         | o       |         |
|          |        | 2&4    | nstabi |         | bserved |         |
|          |        | APT    | lities |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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 | OF     | N      | N      | Oper    | NOMINAL | ######  |
|          | F/Inop | OMINAL | OMINAL | ational |         | ## Oper |
|          |        |        |        |         | 1 Pixel | ational |
|          | Turned | Opera  | FW     | Imagery | cross   |         |
|          | off    | tional | Abrupt | high    | track   | ####### |
|          | 6      |        | return | levels  | misali  | # LW ch |
|          | /23/05 | Occa   | to     | radi    | gnment. | annel 1 |
|          |        | sional | n      | ometric |         | -12 noi |
|          | For    | loss   | ominal | noise   |         | se TOAR |
|          | power  | of     | 7      |         |         |  448 Lo |
|          | b      | Fwheel | /12/05 | TOAR    |         | ose LWI |
|          | alance | synch  |        | 441     |         | R lens. |
|          |        |        | After  | CLOSED  |         |         |
|          | Filter |        | years  |         |         | ####    |
|          | Wheel  |        | of     | Recent  |         | #### Lo |
|          | turned |        | minor  | mo      |         | ngwave  |
|          | OFF    |        | and    | mentary |         | noise i |
|          | 10/    |        | major  | FW      |         | mproved |
|          | 17/02. |        | c      | synch   |         |  7 Apr  |
|          |        |        | urrent | d       |         | but deg |
|          |        |        | surges | ropouts |         | raded a |
|          |        |        |        |         |         | gain 11 |
|          |        |        | FW     | Occ     |         |  Apr 06 |
|          |        |        | m      | asional |         |         |
|          |        |        | ode=Hi | major   |         |         |
|          |        |        | Powr   | FM      |         |         |
|          |        |        |        | surges, |         |         |
|          |        |        |        | most    |         |         |
|          |        |        |        | recent  |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | 12/9/04 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | Nominal |
|  MHS/MIU |        |        |        |         |         |         |
|          |        |        |        |         |         | Space   |
|          |        |        |        |         |         | View=0  |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Two     |
|          |        |        |        |         |         | Turbo   |
|          |        |        |        |         |         | an      |
|          |        |        |        |         |         | omalies |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | Caused  |
|          |        |        |        |         |         | by      |
|          |        |        |        |         |         | proton  |
|          |        |        |        |         |         | hits    |
|          |        |        |        |         |         | 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**  |        | N      |        |         |         |         |
|          |        | ominal |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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  |
|          |        |        | A      | Mode    |         |         |
|          |        |        | -Side, | =AA     | All AGC | All AGC |
|          |        |        | AGC    |         | Mode    | Mode    |
|          |        |        | Mode   | A-side, |         |         |
|          |        |        |        | AGC     |         | Since   |
|          |        |        | Interm | Mode    |         | 15 Aug  |
|          |        |        | ittent |         |         | 05      |
|          |        |        | fa     | (B-side |         |         |
|          |        |        | ilures | in FG   |         |         |
|          |        |        | for    | mode)   |         |         |
|          |        |        | 243MHz |         |         |         |
|          |        |        | A&B    | 243 MHz |         |         |
|          |        |        |        | = INOP. |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARP** |        | OFF    | N      | Nominal | Nominal | Nominal |
|          |        |        | ominal |         |         |         |
|          |        | Power  |        | RCVR    |         | A-side  |
|          |        | F      | RCVR   | B/W = 2 |         | 23      |
|          |        | ailure | B/W =  |         |         | May05   |
|          |        |        | 2      |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SEM**  | ON/N   | Opera  | N      | Nominal | Nominal | Nominal |
|          | ominal | tional | ominal |         |         |         |
|          |        |        |        | E-CDEM  | E-CDEM  | Elec-CH |
|          | Turned | El     | E      | -HVPS=5 | -HVPS=2 | -HVPS=0 |
|          | on     | ec-CH- | -CDEM- |         |         |         |
|          | 8      | HVPS=0 | HVPS=2 | P-CDEM  | P-CDEM  | Prot-CH |
|          | /30/04 |        |        | -HVPS=4 | -HVPS=3 | -HVPS=0 |
|          |        | Pr     | P      |         |         |         |
|          | El     | ot-CH- | -CDEM- |         |         |         |
|          | ec-CH- | HVPS=0 | HVPS=0 |         |         |         |
|          | HVPS=4 |        |        |         |         |         |
|          |        | 1 of 4 |        |         |         |         |
|          | Pr     | T      |        |         |         |         |
|          | ot-CH- | scopes |        |         |         |         |
|          | HVPS=0 | inop   |        |         |         |         |
|          |        |        |        |         |         |         |
|          | 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    |         |         |
|          |        | oper   |        | 426     |         |         |
|          |        | ations |        |         |         |         |
|          |        |        |        | AMSU    |         |         |
|          |        | Tra    |        | EMI     |         |         |
|          |        | nsient |        | causing |         |         |
|          |        | a      |        | erratic |         |         |
|          |        | nomaly |        | B       |         |         |
|          |        |        |        | ehavior |         |         |
|          |        | 1 Sept |        | in PMT  |         |         |
|          |        | 05     |        | cathod, |         |         |
|          |        |        |        | range 3 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | N/A    | ON      | ON      | ON      |
| SADPOS** |        |        |        |         |         |         |
|          |        |        |        | Enabled | ENABLED | Enabled |
|          |        |        |        | MFa     |         |         |
|          |        |        |        | ctor50% | Timer = | Timer   |
|          |        |        |        |         | 12mins  | =12     |
|          |        |        |        | Timer = |         | mins    |
|          |        |        |        | 12 mins |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **T      | N      | N      | TCE26  | Nominal | TCE3H   | All     |
| HERMAL** | ominal | ominal | & 15H  |         | Batt 2A | TCE's   |
|          |        |        |        | TCE24   | heater  | active  |
| Heaters, | TCE's  |        | Telem  | OFF     | failed  |         |
| louvers  | back   |        | i      | 4/14    | ON,     | TCE3H   |
|          | to     |        | nvalid | (AVHRR  | turned  | dis     |
| TCE's    | n      |        |        | H&L)    | off     | playing |
|          | ominal |        | TOAR   |         | 8/26/03 | invalid |
|          | c      |        | 432    | HIRS    |         | r       |
|          | onfigu |        |        | Filter  | AMSU-A1 | eadings |
|          | ration |        | TCE2   | heater  | s       |         |
|          | fol    |        | 4L&25L | turned  | urvival | TOAR    |
|          | lowing |        | (HIRS  | OFF     | heaters | fort    |
|          | 7      |        | &      | 1/18/05 | on      | hcoming |
|          | /25/04 |        | AVHRR) |         | 1       |         |
|          | U      |        | failed |         | 0/29/03 |         |
|          | Vtrip. |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | RCE    |         |         |         |
|          |        |        | ther   |         |         |         |
|          |        |        | mostat |         |         |         |
|          |        |        | failed |         |         |         |
|          |        |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Spac   |         |         |         |
|          |        |        | ecraft |         |         |         |
|          |        |        | in     |         |         |         |
|          |        |        | t      |         |         |         |
|          |        |        | hermal |         |         |         |
|          |        |        | u      |         |         |         |
|          |        |        | ptrend |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N18 |
|          | *N12** | *N14** | *N15** |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-12: There were no changes to N12 during the past reporting period
although N12 will enter its eclipse season within three

weeks.

NOAA-14: There were no changes to N14 during the past reporting period.
There were no AVHRR scan motor current spikes

during the past week (illustration 1) and the Power subsystem was
generally nominal although battery voltages were falling to seasonal
lows as the battery temperatures increased (illustration 2).

.

NOAA-15: The N15 payload suite was generally nominal (illustration 3 and
4) with the spacecraft thermal trend now firmly to the

upside. The N15 Attitude Control Subsystem was also nominal and stable
last week (illustration 5 and 6). VTX-1 continued to perform nominally
since being re-activated on 2 Apr.

NOAA-16: The N16 payload suite was also generally nominal and stable
during the past week (illustration 7 and 8) with the

AVHRR again reaching and sustaining a new historical low scan motor
current and all other payloads nominal and stable. The N16 HIRS filter
motor current fell slightly after equaling its all time high value the
week previous.

There was no change to the DCS configuration on N16 with pseudo
messaging remaining on and expected to remain so indefinitely as it has
proven beneficial to European (IJPS) engineers investigating noise and
RFI events on N18.

NOAA-17: The N17 payload suite was generally nominal and stable during
the past week (illustrations 12 and 13) although the AVHRR scan motor
current experienced yet another mini surge (again equaling an all time
high value) and return to nominal during the past week. There were no
reports of degraded imagery received as a result of this event.

The N17 ADACS experienced a minor perturbation during the past week
between the gyro spin motor currents and the IMU TCA voltage. Late on 5
April, both gyro 1 and 2 spin motor currents both abruptly dropped one
mA. At the same time, the IMU TCA abruptly rose by 0.7 volts. Late on 7
Apr the gyro current rose 1-2 mA and the TCA voltage fell back by
approximately 0.6 volts. This response of the TCA to the gyro motor
current was the opposite of what was expected. As demonstrated on N16 on
13 Mar, when the gyro current goes up the TCA should do likewise and
vice versa (illustration 14). Although there were no apparent peripheral
effects on the N17 ADACS system that appear to be attributable to this
event (illustration 15 and 16), with so many concerns about the N17
gyros it was agreed at the TOAR board that a new TOAR should be opened
up on this situation.

NOAA-18: Most of the N18 payload suite was nominal and stable during the
past week (illustration 18). In addition, late on 7 Apr

the N18 HIRS long wave channels returned to a more nominal value for the
first time since early February.

Accompanying this improvement was improvement in image quality. However,
it did not last. On 11 Apr at approximately 06:09z, the noise again
increased significantly and impacted imagery once again (illustrations
19-22). As has been the case all along, the N18 HIRS hardware was
nominal and showed no discernable change either when the channel noise
improved or when it again degraded (illustration 23). Therefore, the
HIRS hardware remains nominal but the payload users should know that
data can go unstable.

Engineers continue looking into a possible problem with TCE3H on N18
(battery 2A heater) which continued exhibiting unusual readings
(illustration 24). Values that straddle the channel used by TCE3H show
no such degradation nor does any other battery TCE.

On 11 Apr the TOAR Board closed TOAR 456 which investigated the turbo
anomalies that occurred with the MHS. The problem was attributed to
proton strikes over the South Atlantic Anomaly with no actual resolution
possible beyond COP implementation as was performed the previous times
this anomaly occurred. The TOAR Board also closed out TOAR 453 which was
concerned with battery charge to discharge ratios.

MISC: As mentioned in last weeks report, all POES spacecraft experienced
a sun-moon eclipse situation on 29 Mar between

07:30 and 14:00z.

![](media/image1.png){width="8.0in" height="6.083333333333333in"}

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

(Nominal and stable as it has been for more than a month.)

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

**Illustration 2: N14 Power Subsystem Health Analysis**

(Generally nominal and stable with warming batteries and slightly lower
battery voltage levels being reached as a consequence of those temps.)

![](media/image3.png){width="7.833333333333333in" height="6.0in"}

Illustration 3: N15 AMSU's Health Analysis

(Nominal and stable last week with an upward trending thermal cycle.)

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

HIRS AVHRR

Illustration 4: N15 HIRS & AVHRR Health Analysis

(Stable and nominal last week with a thermal uptrend. Synch delta \[not
shown here\] was also stable and nominal.)

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

Illustration 5: N15 ADACS Health Analysis

(Nominal and stable last week. Note the hydrazine plot \[upper right\]
which can be compared to N16 and N17 that appear in later
illustrations.)

Illustration 6: omitted for web release

![](media/image6.png){width="7.916666666666667in"
height="6.083333333333333in"}

Illustration 7: N16 AMSU's Analysis

(Generally nominal and stable all week.)

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

**ILLUSTRATION 8:** N16 HIRS & AVHRR Health Analysis

(HIRS showed some slight improvement from last week while AVHRR once
again achieved and sustained new all time low scan motor current
values.)

Illustration 9: omitted for web release

**ILLUSTRATION 10: omitted for web release**

**ILLUSTRATION 11: omitted for web release**

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

**ILLUSTRATION 12: N17 AMSU's Health Analysis**

(Nominal and stable last week.)

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

**ILLUSTRATION 13: N17 AVHRR Health Analysis**

(Yet another scan motor current "mini-surge and return" event last week
with no apparent impact on imagery. Otherwise nominal.)

![](media/image10.png){width="8.0in" height="5.177083333333333in"}

**ILLUSTRATION 14: N18 Primary Payload Motor Current Analysis**

(Nominal and stable across the board.)

**N16 Gyro vs. TCA cause-effect N17 Gyro vs. TCA cause-effect**

**ILLUSTRATION 14: Comparing N16 and N17 Gyro motor current vs. IMU TCA
voltage changes, cause and effect.**

(As it did on N16 several week ago \[left side plots\] when N17 gyro
motor currents went down, late on JDAY 95 \[right side plots\] it was
expected that the TCA voltage would go down as well, and vice versa. N17
acted the opposite of what was expected and there is currently no
conclusive reason why this occurred.)

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

**ILLUSTRATION 15: N17 ADACS Analysis**

(Nominal and stable last week. No new perturbations. and nothing to
indicate any correlation with the IMU TCA event.)

![](media/image12.png){width="7.916666666666667in" height="6.0in"}

**ILLUSTRATION 16: N17 Attitude Control Analysis**

(Nominal and stable last week and nothing to indicate any correlation
with the IMU TCA event.)

**ILLUSTRATION 17: omitted for web release**

![](media/image13.png){width="7.916666666666667in" height="6.0in"}

**Illustration 18: N18 Primary Payloads Health Analysis**

(Nominal and stable last week.)

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

**Illustration 19: N18 HIRS Long Wave Channel Health Analysis**

(Nominal and stable last week.)

![](media/image15.png){width="7.833333333333333in"
height="5.583333333333333in"}

**Illustration 20: N18 HIRS Long Wave Channel Health Comparison THEN and
NOW**

(Nominal THEN is at a different level then nominal NOW. Therefore the
question is which one is actually nominal? Something of a moot question
now that the channel again went anomalous.)

![](media/image16.png){width="7.833333333333333in" height="6.0in"}

**Illustration 21: N18 HIRS Long Wave Channel Stability Analysis**

![](media/image17.png){width="7.75in" height="5.1305555555555555in"}

**Illustration 22: N18 HIRS Imagery Analysis**

(Imagery improved along with the improvement in Channel noise on 7 Apr
but degraded once again after the 11 Apr degradation of the channels.
Affected channels are marked by an "X" in the left side images.)

![](media/image18.png){width="7.916666666666667in"
height="6.166666666666667in"}

**Illustration 23: N18 HIRS Hardware Analysis**

(No noticeable change regardless of long wave channel situation.
Everything looks nominal and stable.)

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

**Illustration 24: N18 TCE Analysis**

(Plot on lower right shows how a TCE that is cycling should look. The
two plots on the left side are on telemetry channels immediately before
and immediately after TCE3H which is on the top right. Comparing these 4
plots it is very apparent that TCE3H is not working or reporting its
values correctly.

**ILLUSTRATION 25A: omitted for web release**

**ILLUSTRATION 25B: omitted for web release**

**ILLUSTRATION 25C: omitted for web release**

**ILLUSTRATION 25D: omitted for web release**

> **ILLUSTRATION 25E: omitted for web release**

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING April 7, 2006

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

  FRI. 03/31  -080 msec -146 msec  +048 msec  -041 msec  -174 msec  -185 msec

  SAT. 04/01  -080 msec -147 msec  +048 msec  -037 msec  -172 msec  -185 msec

  SUN. 04/02  -082 msec -147 msec  +047 msec  -037 msec  -170 msec  -183 msec

  MON. 04/03  -084 msec -150 msec  +044 msec  -035 msec  -168 msec  -180 msec

  TUE. 04/04  -082 msec -149 msec  +043 msec  -037 msec  -168 msec  -178 msec

  WED. 04/05  -083 msec -148 msec  +044 msec  -036 msec  -167 msec  -176 msec

  THU. 04/06  -082 msec -148 msec  +042 msec  -035 msec  -165 msec  -175 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 11/30/05 due to fractional
second daily ETCUP. A clock

> jump of -500 milliseconds on 02/14/06 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 05/01/06.

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