**POLAR Spacecraft Status As of: Tues 14 Aug 07, 12:00 EST**

*(Changes* from last week in bold border)

+-----------+----------+----------+-----------+-----------+-----------+
| **Sub     | **NO     | **NO     | **N       | #####     | #####     |
| system/** | AA-12D** | AA-15K** | OAA-16L** |  NOAA-17M |  NOAA-18N |
|           |          |          |           |           |           |
| **Co      | AM       | AM:      | PM:       | AM:       | PM        |
| mponent** | 16:59=AN | 17:49=AN | 15:04=AN  | 22:23=AN  | 13:49=AN  |
|           |          |          |           |           |           |
|           | STIP     | GAC data | GAC&LAC   | GAC&LAC   | GAC & LAC |
|           | data     | only     | data      | data      | data      |
|           | only     |          |           |           |           |
|           |          |          |           |           |           |
|           | No IPD   |          |           |           |           |
|           | pr       |          |           |           |           |
|           | ocessing |          |           |           |           |
+===========+==========+==========+===========+===========+===========+
| **L       | 05/14/91 | 05/13/98 | 09/21/00  | 6/24/02   | #######   |
| AUNCHED** |          |          |           |           |  5/20/05  |
+-----------+----------+----------+-----------+-----------+-----------+
| **CNTL    | OBP2     | OBP2     | OBP2      | OBP2      | OBP2      |
| OBP**     |          |          |           |           |           |
|           | R        |          |           |           |           |
|           | ecursive |          |           |           |           |
|           | SCT      |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **BUS**   | B-BUS    | B-BUS    | B-BUS     | B-BUS     | B-BUS     |
|           |          |          |           |           |           |
|           | XSU-1    | XSU-1    | XSU-1:    | XSU-1     | XSU-1     |
|           |          |          | TOAR444   |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **BUS     | NO       | NO       | NO        | NO        | NO        |
| VETO**    |          |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **ADACS** | [Nominal | [Nominal | ####      | ######    | [Nominal  |
|           | M        | M        | ## [RGYRO |  [Nominal | Mode]{.u  |
|           | ode]{.un | ode]{.un |  Mode]{.u |  Mode]{.u | nderline} |
|           | derline} | derline} | nderline} | nderline} |           |
|           |          |          |           |           | Gyro-A    |
|           | Au       | Rgmode   | Estimate  | Rgmod     | MIMU-2    |
|           | tonomous | =Monitor | Y-ROLL    | e=Monitor |           |
|           | swap to  |          |           |           | Z-wheel   |
|           | YGC 30   | Gyro-3   | Rgmod     | Gyro-3    | -Pitch    |
|           | Aug 06,  | Off      | e=PASSIVE | Off       |           |
|           | c        | 6/26/00  |           | 6/10/04   | TOAR 447  |
|           | ommanded | Gyro     | Gyros-1 & |           |           |
|           | back to  | c        | 3         | Gyro      | Z         |
|           | nominal  | hans=AAB | Inop/Off  | chans=AAB | -momentum |
|           | 31 Aug   |          |           | GAS       | t         |
|           |          | N2 Low   | Gyro      | Enabled   | ransition |
|           | RGmode   | PSI      | chans     | Dec 05    | complete  |
|           | =Monitor | invalid  | XA-ZB     |           |           |
|           |          |          |           | \*Z Gas   | Pitch     |
|           | Gyro     |          | Pitch     | unload    | Torquer   |
|           | c        |          | wheel     | =45       | again     |
|           | hans=XYZ |          | bias 2400 |           | active    |
|           |          |          |           |           |           |
|           |          |          | \*Z gas   |           |           |
|           |          |          | unload =  |           |           |
|           |          |          | 145       |           |           |
|           |          |          |           |           |           |
|           |          |          | Gyro2     |           |           |
|           |          |          | safe      |           |           |
|           |          |          | macro     |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **RXO**   | PRI      | PRI      | PRI       | PRI       | PRI       |
|           |          |          |           |           |           |
|           | BU       | daily    | Daily     | Daily     | No daily  |
|           | random   | bias -8  | Bias      | Bias --3  | bias      |
|           | enables  | mS       | --5.5 mS  | mS        |           |
|           |          |          |           |           | -1500 mS  |
|           | daily    | -500 mS  | -1500 mS  | -1500 mS  | 31Dec05   |
|           | bias+6.5 | 12/31/05 | 31Dec05   | 31Dec05   |           |
|           | mS       |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **CLOCK   | 2        | 2        | 2         | 2         | 2         |
| DIV**     |          |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **MIRP**  | External | External | External  | External  | External  |
|           | Synch    | Synch    | Sync      | Sync      | Synch     |
|           |          | Rephase  |           |           |           |
|           | Rephase  | 0730     | Rephase   | Rephase   | Rephase   |
|           | Enabled  | daily    | each      | Enabled   | Enabled   |
|           |          |          | orbit     |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **TIP     | 1        | 2        | 2         | 2         | 1         |
| SIDE**    |          |          |           |           |           |
|           |          | (since   | since     | Swapped   | Analog    |
|           |          | 4/3/03)  | 4/18/05   | 9/20/06   | telem     |
|           |          |          |           |           | drifting  |
|           |          | 3        | (analog   |           |           |
|           |          | channels | d         |           |           |
|           |          | inop     | rifting?) |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **Re      | DTRs 3A, | DTRs 1,  | DTRs 1,   | DTR 1,3,4 | SSRs      |
| corders** | 4, 5B    | 2, 3, 4  | 2, 3, 4A  | / SSR 2   | 1,2,3,4,5 |
|           |          | S        |           |           |           |
| **(DTR,   | S        | afestate | Safestate | Safe      | Saf       |
| SSR)**    | afestate | 1B EOT   | 3A        | state=SSR | estate=5B |
|           | 5B       |          |           | 2B        |           |
|           |          |          | 4B STIP   |           | Current   |
|           | 4b low   |          | only      | 4A        | spikes    |
|           | pressure |          |           | Pressure  |           |
|           |          |          |           | leak      |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **VTX**   | #1 ON    | #1 ON    | OFF /     | #2 ON     | #2 ON     |
|           |          |          | INOP      |           |           |
| (APT      | 137.50   | As of 19 |           | 137.62    | 137.9125  |
| data)     | MHZ      | June 07  | since     | MHZ       | MHZ       |
|           |          |          | 11/15/00  |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **BTX**   | #1       | #1       | #2        | #         | #1        |
|           |          |          |           | ###### #2 |           |
|           | 136.77   | 137.35   | 137.77    |           | 137.35    |
|           | MHZ      | MHZ      | MHZ       | 137.77    | MHZ       |
|           |          |          |           | MHZ       |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **STX**   | 1 --     | 2-Omni   | 2 -- HRPT | 3 -- HRPT | 1 - HRPT  |
|           | HRPT;    | HRPT     |           |           |           |
| 1 = rcp   |          |          | 1--       | TOAR424   | 3 -       |
| 1698.0    | 2,3 -    | 2        | Playback  | low power | Playback  |
| mhz       | Playback | Omni=rcp |           |           |           |
|           |          |          | 4 off     | 2 & 1     | 2         |
| 2 = lcp   |          | Power    | INOP-10   | Playback  | -Playback |
| 1702.5    |          | TOAR 446 | Aug 2007  |           |           |
| mhz       |          |          |           | STX-1     | 4-Test &  |
|           |          | 4-       | 3 low     | Power     | Standby   |
| 3= rcp    |          | Playback | power     | drop      |           |
| 1707.0    |          |          | INOP -10  |           |           |
| mhz       |          | 1,2,3-   | Aug 2007  | STX-4 no  |           |
|           |          | Degraded |           | m         |           |
| 4= rcp    |          |          |           | odulation |           |
| 2247.5    |          |          |           |           |           |
| mhz       |          |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| ### POWER | [        | [Array   | [Array    | [Array    | [Array    |
|           | ArrayOff | Off      | Off       | Off.      | Off.      |
| (Array    | +90]{.un | -45]{.un | -40]{.u   | --40]{.u  | -40]{.u   |
| offset    | derline} | derline} | nderline} | nderline} | nderline} |
| and CANT  |          |          |           |           |           |
| angle,    | [since   | [Since   | [Since    | [Since    | [Since    |
| eclipse   | 8/8      | 1/25     | 7/        | 1/        | 6         |
| states    | /07]{.un | /01]{.un | 16/]{.und | 29/04]{.u | /6/05]{.u |
| and sun   | derline} | derline} | erline}02 | nderline} | nderline} |
| angle)    |          |          |           |           |           |
|           | Full Sun | Full Sun | Eclipse   | Eclipse   | Eclipse   |
|           |          |          | all year  | all year  | all year  |
|           | Sun      | Sun      |           |           |           |
|           | Angle 16 | Angle 13 | Sun Angle | Sun Angle | Sun Angle |
|           | uptrend  |          | 34        | at 66     | 63        |
|           | to 20 in | Uptrend  |           |           | uptrend   |
|           | early    | to 18    | Steady    | Steady    | to 65 on  |
|           | Jan 07   | early    | trend     | trend     |           |
|           |          | Jan 07   |           |           | 1 Jan 07  |
|           | Shunts   |          | SA        | SA        |           |
|           | severely | SA       | CANT=22   | CANT=37   | SA        |
|           | degraded | CANT=37  | degs      | degs      | CANT=22   |
|           |          | degs     |           |           |           |
|           | SA       |          | Tran      |           | BVR Phase |
|           | CANT=37  |          | sitioning |           | Control   |
|           | degs     |          | to full   |           | auton     |
|           |          |          | sun S/C   |           | swap      |
|           | PSSS     |          | in Sept   |           | 3/29/06 & |
|           | trigger  |          | 07        |           | 1/4/07    |
|           | =18.5    |          |           |           |           |
|           |          |          | BVR Phase |           |           |
|           | BVR &    |          | Control   |           |           |
|           | PSE to   |          | auton     |           |           |
|           | Back-up  |          | swap      |           |           |
|           | 8/7/07   |          | 7/19/07   |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **AVHRR** | Nominal  | Nominal  | Nominal   | ##        | Nominal   |
|           |          |          |           | # Nominal |           |
|           | HRPT and | Channel  | Recent SM |           | Channel   |
|           | APT data | 3B only  | current   | 3A-B      | 3B only   |
|           | only     |          | increases | switch    |           |
|           |          | Oc       |           | enabled   | Scan      |
|           |          | casional | TCE24 OFF |           | motor     |
|           |          | minor    | 4/14/04   | Previous  | current   |
|           |          | scan     |           | scan      | drop 29   |
|           |          | motor    | Channel   | motor     | Aug 06    |
|           |          | insta    | 3B only   | current   |           |
|           |          | bilities |           | mini      |           |
|           |          |          |           | surges    |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **        |          | Ope      | Op        | OFF/INOP  | Nominal   |
| AMSU-A1** |          | rational | erational |           |           |
|           |          |          |           | Since     | Full Scan |
|           |          | Ch14     | Primary   | 10/30/03  | mode      |
|           |          | ino      | PLLO      |           |           |
|           |          | perative | chans     | Survival  |           |
|           |          |          | 9-14 bias | heat on.  |           |
|           |          | Ch11     | shift.    |           |           |
|           |          | ino      |           |           |           |
|           |          | perative | Backup    |           |           |
|           |          |          | PLLO      |           |           |
|           |          |          | inop.     |           |           |
|           |          |          |           |           |           |
|           |          |          | Channel   |           |           |
|           |          |          | 9-14      |           |           |
|           |          |          | noise     |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **\`      |          | Nominal  | Nominal   | Nominal   | Nominal   |
| AMSU-A2** |          |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| *         |          | Ope      | Op        | Nominal   | **        |
| *AMSU-B** |          | rational | erational |           | *Replaced |
|           |          |          |           |           | by MHS*** |
|           |          | Bias in  | Space     |           |           |
|           |          | All      | P         |           |           |
|           |          | Chans.   | osition-3 |           |           |
|           |          |          |           |           |           |
|           |          | Degraded | Chan-8    |           |           |
|           |          | Chan-3   | de        |           |           |
|           |          |          | gradation |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| ### HIRS  | ON/Inop  | NOMINAL  | NOMINAL   | NOMINAL   | ###       |
|           |          |          |           |           | ##### Ope |
|           | Turned   | FW       | New all   | 1 Pixel   | rational  |
|           | On       | Abrupt   | time high | cr        |           |
|           | 4/30/05  | return   | filter    | oss-track | Filter    |
|           |          | to       | motor     | misa      | Heat OFF. |
|           | for      | nominal  | current   | lignment. |           |
|           | power    | 7/12/05  | reached   |           | ##        |
|           | balance  |          | 9/17/06.  |           | ###### LW |
|           |          | After    |           |           |  channel  |
|           | Filter   | years of | Imagery   |           | 1-12 nois |
|           | Wheel    | minor    | occ       |           | e TOAR 44 |
|           | OFF      | and      | asionally |           | 8 Loose L |
|           |          | major    | exhibits  |           | WIR lens. |
|           | Outgas & | current  | high      |           |           |
|           | Filter   | surges   | levels of |           | LW        |
|           | Wheel    |          | ra        |           | imagery   |
|           | Htrs On  | FW       | diometric |           | erratic.  |
|           | 8/6/07,  | mode=Hi  | noise     |           |           |
|           | Pwr Bal  | Powr     |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| ##        |          |          |           |           | Nominal   |
| # MHS/MIU |          |          |           |           |           |
|           |          |          |           |           | Fly Wheel |
|           |          |          |           |           | Motor     |
|           |          |          |           |           | Current   |
|           |          |          |           |           | Spiking   |
|           |          |          |           |           | but not   |
|           |          |          |           |           | alarming  |
|           |          |          |           |           | since 27  |
|           |          |          |           |           | Dec 06    |
|           |          |          |           |           |           |
|           |          |          |           |           | Entered   |
|           |          |          |           |           | Motor     |
|           |          |          |           |           | Spin      |
|           |          |          |           |           | State on  |
|           |          |          |           |           | 27 March  |
|           |          |          |           |           | 07        |
+-----------+----------+----------+-----------+-----------+-----------+
| **MSU**   | ON/Inop  |          |           |           |           |
|           |          |          |           |           |           |
|           | Turn on  |          |           |           |           |
|           | 7/9/07   |          |           |           |           |
|           | for      |          |           |           |           |
|           | power    |          |           |           |           |
|           | balance  |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **SSU**   |          |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **DCS**   | Nominal  | Nominal  | Nominal   | Nominal   | Nominal   |
|           |          |          |           |           |           |
| RFI       |          |          | Pseudo    |           | DRU's 1-7 |
| inve      |          |          | message   |           | On        |
| stigation |          |          | turned on |           |           |
|           |          |          | 1/5/06    |           | DRU8      |
|           |          |          |           |           | inop/off  |
+-----------+----------+----------+-----------+-----------+-----------+
| **SARR**  |          | Ope      | Op        | Nominal   | Nominal   |
|           |          | rational | erational |           |           |
|           |          |          |           | A-side    | A-Side    |
|           |          | A-Side,  | Mode =AA  |           |           |
|           |          | AGC Mode |           | All AGC   | All AGC   |
|           |          |          | A-side,   | Mode      | Mode      |
|           |          | Inte     | AGC Mode  |           |           |
|           |          | rmittent |           |           | Since 15  |
|           |          | failures | (B-side   |           | Aug 05    |
|           |          | for      | in FG     |           |           |
|           |          | 243MHz   | mode)     |           |           |
|           |          | A&B      |           |           |           |
|           |          |          | 243 MHz = |           |           |
|           |          |          | INOP.     |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **SARP**  |          | Nominal  | Nominal   | Nominal   | Nominal   |
|           |          |          |           |           |           |
|           |          | RCVR B/W | RCVR B/W  |           | A-side 23 |
|           |          | = 2      | = 2       |           | May05     |
+-----------+----------+----------+-----------+-----------+-----------+
| **SEM**   | ON       | Nominal  | Nominal   | Nominal   | Nominal   |
|           | /Nominal |          |           |           |           |
|           |          | E-CDE    | E-CD      | E-CD      | Elec-     |
|           | Au       | M-HVPS=2 | EM-HVPS=6 | EM-HVPS=2 | CH-HVPS=1 |
|           | tonomous |          |           |           |           |
|           | reset    | P-CDE    | P-CD      | P-CD      | 27 June   |
|           |          | M-HVPS=0 | EM-HVPS=5 | EM-HVPS=4 | 06 17:00z |
|           | 8 Jun    |          |           |           |           |
|           | 06, back |          | 27 Jun    | 27 June   | Prot-     |
|           | to       |          | 0615:30z  | 06 16:00z | CH-HVPS=0 |
|           | nominal  |          |           |           |           |
|           | 10 June  |          |           |           |           |
|           |          |          |           |           |           |
|           | Turned   |          |           |           |           |
|           | on       |          |           |           |           |
|           | 8/30/04  |          |           |           |           |
|           |          |          |           |           |           |
|           | Elec-C   |          |           |           |           |
|           | H-HVPS=4 |          |           |           |           |
|           |          |          |           |           |           |
|           | Prot-C   |          |           |           |           |
|           | H-HVPS=0 |          |           |           |           |
|           |          |          |           |           |           |
|           | TED      |          |           |           |           |
|           | level=3  |          |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **SBUV**  |          |          | Op        | Nominal   | Nominal   |
|           |          |          | erational |           |           |
|           |          |          |           | Anode     | Anode     |
|           |          |          | Degraded  | Mode      | mode      |
|           |          |          | Ozone     |           |           |
|           |          |          | data      | Plan      | since 6   |
|           |          |          |           | sweep     | July 05   |
|           |          |          | Backup    | mode      | 13:30z    |
|           |          |          | Diffuser  |           |           |
|           |          |          | inop      | Standard  | El        |
|           |          |          |           | Ops       | ectronics |
|           |          |          | Primary   |           | turnoff   |
|           |          |          | Diffuser  | TOAR 463  | taken out |
|           |          |          | d         | sun glint | of STESM  |
|           |          |          | eployment |           | safestate |
|           |          |          | problem   | IBSL test | table     |
|           |          |          | TOAR 426  | performed |           |
|           |          |          |           | 12 Sept   | TOAR 462  |
|           |          |          | AMSU EMI  | 06        | sun glint |
|           |          |          | causing   |           |           |
|           |          |          | erratic   | Grating   |           |
|           |          |          | Behavior  | motor     |           |
|           |          |          | in PMT    | inve      |           |
|           |          |          | cathod,   | stigation |           |
|           |          |          | range 3   |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| *         |          |          | ON        | ON        | ON        |
| *SADPOS** |          |          |           |           |           |
|           |          |          | Enabled   | ENABLED   | Enabled   |
|           |          |          | M         |           |           |
|           |          |          | Factor50% | Timer =   | Timer =12 |
|           |          |          |           | 12mins    | mins      |
|           |          |          | Timer =   |           |           |
|           |          |          | 12 mins   |           |           |
+-----------+----------+----------+-----------+-----------+-----------+
| **        | Nominal  | TCE26 &  | Nominal   | TCE3H     | All TCE's |
| THERMAL** |          | 15H      |           | Batt 2A   | active    |
|           | TCE's    |          | TCE24 OFF | heater    |           |
| Heaters,  | back to  | Telem    | 4/14/05   | failed    | HIRS      |
| louvers   | nominal  | valid    |           | ON,       | filter    |
|           | confi    |          | (AVHRR    | turned    | heater    |
| TCE's     | guration | TOAR 432 | H&L)      | off       | turned    |
|           | f        | closed   |           | 8/26/03   | OFF       |
|           | ollowing |          | HIRS      |           | 9/28/06   |
|           | 7/25/04  | TC       | Filter    | AMSU-A1   |           |
|           | UVtrip.  | E24L&25L | heater    | survival  |           |
|           |          | (HIRS &  | turned    | heaters   |           |
|           |          | AVHRR)   | OFF       | on        |           |
|           |          | failed   | 1/18/05   | 10/29/03  |           |
|           |          | 5/13/98  |           |           |           |
|           |          |          |           |           |           |
|           |          | RCE      |           |           |           |
|           |          | th       |           |           |           |
|           |          | ermostat |           |           |           |
|           |          | failed   |           |           |           |
|           |          | 5/13/98  |           |           |           |
|           |          |          |           |           |           |
|           |          | Sp       |           |           |           |
|           |          | acecraft |           |           |           |
|           |          | in       |           |           |           |
|           |          | thermal  |           |           |           |
|           |          | uptrend  |           |           |           |
+-----------+----------+----------+-----------+-----------+-----------+

**COMMENTS/CHANGES:**

MISC: Planning for a partial solar eclipse on 11 Sep 2007 is being
planned.

NOAA-12: After spending many days attempting to power balance NOAA-12,
it was decided to decommission the spacecraft. It was decommissioned on
10 August 2007 at 17:18:38z

There were relatively no changes to the rest of the NOAA-12 health
situation during the past week. MSU power balance appears to continue to
hold stable at the motor\'s turn on temperature of 70 C.

NOAA-12's power balance situation continued to degrade significantly.
There were been numerous SAD Bias responses to the Filtered Bus Voltage
exceeding 28.5V. Once the SA was moved to +90 º, for part of the orbit
the bus was stealing the charge current from the batteries. The
discharge rate was 0 but the charge rate was not at its nominal levels
of 1.7 or .75 amps. This led us to believe that we could not achieve a
power neutral situation during a full sun orbit. (See Figure 1)

During the depletion of the fuel it was noted that the N2 low pressure
(the regulator pressure) was decreasing where it should have bounced
back to 500psi after the thruster firings to close the regulator until
the high pressure was equal to 500psi (see Figure 2). Also noted as more
fuel was the attitude response was weakening. After discussions with
NASA/GSFC personnel and EMOSS investigating the OV report for NOAA-12,
it was discovered that at handover to NOAA the N2 high pressure in the
tank was \~900psi. This high pressure was now reading \~2800psi. The
high pressure transducer did have a problem quickly after launch where
its reading went to 0 for \~20 min and then returned to a nominal value.
When EMOSS investigated the pressure reading, it was noticed that it was
rising slowly for the past 10 years or so. Therefore there was not as
much N2 fuel left then believed, thus the regulator pressure dropping
was indicative of the amount of pressure left in the tank. We actually
were below the blow-down threshold. After this discovery we proceeded
with the deactivation.

A change to this deactivation from NOAA-14's was the addition of firing
only the N2 thruster for 25.5 seconds and opening all thruster valves
(including hydrazine) to deplete all possible fuel. Very little attitude
disturbance was noted, thus proving as much of the fuel as possible was
depleted.

For Battery Information see Figure 2, note that since the Solar Array
offset of +95º, NOAA-12 has been going power negative every orbit.

Below is the list of actions taken:

8 August 2007

-   16:20z

    -   Slewed the Solar Array to a +95º offset from +90º.

-   19:40z

    -   Thrusters were fired (4 yaw/roll thrusters) for 1 second to test
        the depletion of the fuel

10 August 2007

-   15:30z

    -   Thrusters were fired (4 yaw/roll thrusters) for 5 second to test
        the depletion of the fuel; this was done numerous times during
        the pass.

-   17:40z

    -   NOAA-12 was decommissioned

NOAA-15: There were relatively no changes to the NOAA-15 payload health
situation during the past week. N-15 has come out of summer eclipse
season.  EPS in nominal

The Z RWA has completed its migration to negative RPM. No impact on
operations. The #2 gyro is still unstable since about July 24th. This
has affected yaw control (yaw updates as high as 0.7 degrees). The trend
is not evident in gyro motor current or thermal data.

NOAA-16: There was relatively no change in the performance of the
NOAA-16 payload subsystems during the past week and the rest of the
spacecraft subsystems were also nominal during this time.

On 10 August 2007 at 08:01z, the AET was not able to achieve bit sync or
frame sync lock on STX-4. The CDA noticed that there was an RF carrier
with no modulation; very similar to the NOAA-17 STX-4 anomaly. STX-4 is
currently unusable. The schedules were updated to use STX-3 which is
known to have a lower output power of \~1 watt but thought to be usable.
After 2 uses of STX-3, it became too noisy to retrieve the data. It is
also considered unusable at this time. The schedules were again updated
to reflect the 2 unusable STXs.

A request from NASA has been made to move the SA from -40 to -35 so the
shunts are always on to possibly avoid the spikes on the recorders. An
evaluation and a date for move is TBD. NOAA-16 will be in full sunlight
beginning in mid-September. This is the first time ever it will not be
eclipsing.

NOAA-17: There was relatively no change in the performance of the
NOAA-17 payload subsystems during the past week. The HIRS filter wheel
period noise calmed down this week.

No updates or conclusion were reached about the Attitude disturbance on
17 July 2007. The investigation continues.

NOAA-18: There were relatively no changes to the NOAA-18 health
situation during the past week.

On 13 August 2007 at 05:11z the following mnemonics flagged and have
remained out of limits: MSPH4VAL (YL), MSPH3VAL (YL), MSPDCOFV (YL),
MSPDCOFE (YH), MHKDCOFE (YH), QSPPRFLT (YH). These are indications that
the DC offsets for channels H3 and H4 have moved out of the optimum
range. The instrument data is degraded, but there is no health and
safety risk.

The VTX will be switched from side 2 to 1 on 16 Aug 2007 at 14:43.

MetOp A: No significant changes reported on the NOAA instruments on
MetOp. The HRPT transmitter failure investigation continues.

[Trend Observations]{.underline} (NOAA Instruments) 

·         AMSU-A1 Dig A temperatures dropped steadily by approximately
0.5 deg C over the course of the week.  This trend has also been
observed over the past month, where the average drop in temperature has
been approximately 1 deg C.  AMSU-A2 temperatures have remained stable
during the same period.

·         With one exception (refer to AR8360, described below under
"Anomalies"), all other housekeeping telemetry and science data were
stable during this reporting period.

·         EUMETSAT confirmed an error in their NEdN calculation method
for the CVF HIRS Daily Report.  This was corrected on August 8 and now
the NEdN values are very stable.

·         HIRS Filter Wheel resyncs have remained at the same
approximate rate as reported last week (approximately once every 93
seconds).

 

[Anomalies]{.underline}

·         AR8360, "HIRS Scan Mirror Temperature Out-of-Limits": 
Anomalous temperature telemetry was observed between August 6-8, but has
returned to nominal since then.  There was also a correlation observed
between jumps in the Scan Mirror Temperature telemetry and slight drops
in the Patch Power.  This is currently under investigation by ITT.

·         Investigations continued on trying to isolate the cause of the
HRPT SSPA failure.

 

[Operations Performed]{.underline}

·         The SEM IFCs were run on Tuesday, August 7, with the TED IFC
starting at 08:53:03 UTC and the MEPED IFC starting at 08:54:23 UTC.

 

[Operations Planned]{.underline}

·         The SEM IFCs will be run again on their weekly schedule
(Tuesday, Aug 14).

NOTES: Figures 3 -- 5 have been omitted for web listing.

 

![](media/image4.jpeg){width="8.822916666666666in"
height="6.502777777777778in"}

**Figure 1 NOAA-12 EPS (2007/218-221)**

![](media/image5.jpeg){width="8.8875in" height="6.502083333333333in"}

**Figure 2 NOAA-12 RCE (2007/217-223) 30-226)**

![](media/image6.jpeg){width="8.906944444444445in"
height="6.627777777777778in"}

**Figure 6 NOAA-16 STX-3 Output Power (2007/222-223)**

![](media/image7.jpeg){width="8.909722222222221in"
height="6.496527777777778in"}

**Figure 7 NOAA-16 STX-3 Temperature (2007/222-223)**

![](media/image8.jpeg){width="8.89861111111111in"
height="6.622916666666667in"}

**Figure 8 NOAA-16 STX-4 Output Power (2007/218-222)**

![](media/image9.jpeg){width="8.89861111111111in"
height="6.501388888888889in"}

**Figure 9 NOAA-16 STX-4 Temperature (2007/218-222)**