**POLAR Spacecraft Status As of: Weds, 28 Jul 04 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-N18 |
|          |        |        |        |         |         |         |
| **Com    | AM:    | AM:    | AM:    | PM:     | AM:     | Planned |
| ponent** | AN     | AN     | AN     | A       | A       | PM      |
|          | =1644Z | =1930Z | =1837Z | N=1437Z | N=2220Z |         |
|          |        |        |        |         |         | Plan    |
|          | STIP   | STIP   | GAC    | GAC&LAC | GAC&LAC | AN      |
|          | data   | data   | data   | data    | data    | =14:00L |
|          | only   | only   | only   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **LA     | 05     | 12     | 05     | 0       | 6/24/02 | Planned |
| UNCHED** | /14/91 | /30/94 | /13/98 | 9/21/00 |         |         |
|          |        |        |        |         |         | #####   |
|          |        |        |        |         |         | ## NET  |
|          |        |        |        |         |         | 2/11/05 |
+----------+--------+--------+--------+---------+---------+---------+
| **CNTL   | OBP2   | OBP2   | OBP2   | OBP2    | OBP2    |         |
| OBP**    |        |        |        |         |         |         |
|          |        | OBP1   |        |         | CPU1&2  |         |
|          |        | inope  |        |         | Errr    |         |
|          |        | rative |        |         | TOAR    |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BUS**  | B-BUS  | B-BUS  | B-BUS  | B-BUS   | B-BUS   |         |
|          |        |        |        |         |         |         |
|          | XSU-1  | XSU2   | XSU-1  | XSU-1   | XSU-1   |         |
|          |        | (XSU1  |        |         |         |         |
|          |        | inop)  |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BUS    | NO     | NO     | NO     | NO      | NO      |         |
| VETO**   |        |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | [N     | [N     | [N     | #####   | #####   | New     |
| *ADACS** | ominal | ominal | ominal | # [Nomi | # [Nomi |         |
|          | Mode]  | Mode]  | Mode]  | nal Mod | nal Mod | ring    |
| X=Yaw    | {.unde | {.unde | {.unde | e]{.und | e]{.und | laser   |
|          | rline} | rline} | rline} | erline} | erline} | gyro    |
| Y=Roll   |        |        |        |         |         |         |
|          | RG     | Rgm    | Rg     | Rgmode= | Rgmode= |         |
| Z=Pitch  | mode=M | ode=Di | mode=M | Monitor | Monitor |         |
|          | onitor | sabled | onitor |         |         |         |
|          |        |        |        | Gyro-3  | Gyro-3  |         |
|          | Gyro   | Gyro   | Gyro-3 | Off     | Off     |         |
|          | cha    | cha    | Off    | 6/10/04 | 6/10/04 |         |
|          | ns=XYZ | ns=XYZ | 6      |         |         |         |
|          |        |        | /26/00 | Gyro    | Gyro    |         |
|          |        | SS     | Gyro   | ch      | ch      |         |
|          |        | check  | cha    | ans=AAA | ans=AAB |         |
|          |        | Di     | ns=AAB |         |         |         |
|          |        | sabled |        | Gyro3   | Gyro3   |         |
|          |        | when   | N2 Low | TOAR    | TOAR    |         |
|          |        | mo     | PSI    | 427     | 436     |         |
|          |        | de=YGC | i      |         |         |         |
|          |        |        | nvalid |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **RXO**  | PRI    | PRI    | PRI    | PRI     | PRI     |         |
|          |        |        |        |         |         |         |
|          | BU     | BU     | daily  | Daily   | Daily   |         |
|          | random | random | bias   | Bias    | Bias    |         |
|          | e      | e      | -8     | --5.5   | --3     |         |
|          | nables | nables | mSec   | mS      | mSec    |         |
|          |        | daily  |        |         |         |         |
|          | daily  | bia    |        |         |         |         |
|          | bi     | s--7.0 |        |         |         |         |
|          | as+6.5 | mS     |        |         |         |         |
|          | mS     |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **CLOCK  | 2      | 2      | 2      | 2       | 2       |         |
| DIV**    |        |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **MIRP** | Ex     | Ex     | Ex     | E       | E       |         |
|          | ternal | ternal | ternal | xternal | xternal |         |
|          | Synch  | Synch  | Synch  | Sync    | Sync    |         |
|          |        |        | R      |         |         |         |
|          | R      | R      | ephase | Rephase | Rephase |         |
|          | ephase | ephase | 0730   | each    | Enabled |         |
|          | E      | 0730   | daily  | orbit   |         |         |
|          | nabled | Daily  |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **TIP    | 1      | 1      | 2      | 1       | 1       |         |
| SIDE**   |        |        | (since |         |         |         |
|          |        |        | 4/     | Analog  | Analog  |         |
|          |        |        | 23/03) | telem   | telem   |         |
|          |        |        |        | d       | drift   |         |
|          |        |        | Ch     | rifting |         |         |
|          |        |        | annels |         |         |         |
|          |        |        | 224    |         |         |         |
|          |        |        | -227   |         |         |         |
|          |        |        | i      |         |         |         |
|          |        |        | nvalid |         |         |         |
|          |        |        | TOAR   |         |         |         |
|          |        |        | 432    |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Dwell  |         |         |         |
|          |        |        | test   |         |         |         |
|          |        |        | 7/26   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DTRs** | 3, 4,  | 1, 2B, | 1, 2,  | 1       | 1,2,3,4 | All     |
|          | 5B     | 3A, 5  | 3, 4   | ,2,3,4A |         | solid   |
|          |        | Safe   | Saf    |         | Safes   | state   |
|          | Saf    | state- | estate | Sa      | tate=1B | digital |
|          | estate | 1B     | 1B EOT | festate |         | re      |
|          | 3B     |        |        | 3A      | D       | corders |
|          | since  |        |        |         | TR2-SSR |         |
|          | 9 Jun  |        |        | 4B TOAR |         |         |
|          |        |        |        | 418     | DTR5    |         |
|          |        |        |        |         | TOAR    |         |
|          |        |        |        | (STIP   | 420     |         |
|          |        |        |        | only)   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **VTX**  | #1 ON  | OFF    | #1 ON  | INOP    | #2 ON   |         |
|          |        |        |        |         |         |         |
| (APT     | 137.50 | Since  | Turned | OFF     | 137.62  |         |
| data)    | MHZ    | 8      | on     | since   | MHZ     |         |
|          |        | /14/02 | 7/7/04 | 1       |         |         |
|          |        |        |        | 1/15/00 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **BTX**  | #1     | #2     | #1     | #1      | ###     |         |
|          |        |        |        |         | #### #2 |         |
|          | 136.77 | 137.77 | 137.35 | 137.35  |         |         |
|          | MHZ    | MHZ    | MHZ    | MHZ     | 137.77  |         |
|          |        |        |        |         | MHZ     |         |
+----------+--------+--------+--------+---------+---------+---------+
| **STX**  | 1 --   | 3 --   | 2-Omni | 1 --    | 3 --    |         |
|          | HRPT;  | HRPT   | HRPT   | HRPT;   | HRPT    |         |
| #        |        |        |        |         |         |         |
| 1=1698.0 | 2,3 -  | 2, 1   | 4-Pl   | 2--     | TOAR424 |         |
| mhz      | Pl     | --     | ayback | Pl      | low     |         |
|          | ayback | Pl     |        | ayback; | power   |         |
| #        |        | ayback | 1,     |         |         |         |
| 2=1702.5 |        |        | 2,3-De | 4 --    | 1&2     |         |
| mhz      |        |        | graded | P       | P       |         |
|          |        |        |        | layback | layback |         |
| #        |        |        | #      |         |         |         |
| 3=1707.0 |        |        | #####  | 3 low   | 4 --    |         |
| mhz      |        |        |        | power   | TIP     |         |
|          |        |        |        | unused  |         |         |
| #        |        |        |        |         |         |         |
| 4=2247.5 |        |        |        |         |         |         |
| mhz      |        |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| #        | [Ar    | [Array | [Array | [Array  | [Array  |         |
| ## POWER | rayOff | Off    | Off    | Off     | Off.    |         |
|          | -50]   | -55]   | -45]   | -4      | --4     |         |
| (Array   | {.unde | {.unde | {.unde | 0]{.und | 0]{.und |         |
| offset,  | rline} | rline} | rline} | erline} | erline} |         |
| charge   |        |        |        |         |         |         |
| and      | since  | Since  | Since  | Since   | Since   |         |
| eclipse  | 7      | 8      | 1      | 7/16/02 | 1/29/04 |         |
| states,  | /27/04 | /21/03 | /25/01 |         |         |         |
| sun      |        |        |        | Eclipse | Eclipse |         |
| angle)   | B      | E      | E      | all     | all     |         |
|          | attery | clipse | clipse | year    | year    |         |
|          | Un     | all    | Season |         |         |         |
|          | dervol | year   | Peak   | Sun     | Sun     |         |
|          | t      |        | 15     | Angle   | Angle   |         |
|          | event  | Sun    | June   | 68      | at 70   |         |
|          | 25Jul. | Angle  | ends   |         |         |         |
|          |        | at 40  | 28     | Steady  | Steady  |         |
|          | Sun    | steady | July   | Trend   | trend   |         |
|          | Angle  | trend  |        |         |         |         |
|          | 36     |        | Sun    | Batts   | Batts   |         |
|          | down   | Batts  | Angle  | 1-3=    | 1-3=    |         |
|          | to 15  | 1-3=   | 30     | LRC     | LRC     |         |
|          | m      | LRC    |        |         |         |         |
|          | id-Oct |        | down   | V/T=4/8 | V/T=    |         |
|          |        | Batts  | trend  |         | 4/8     |         |
|          | E      | 1&3V/  | to 8   |         |         |         |
|          | clipse | T=8/11 | in     |         |         |         |
|          | Season |        | early  |         |         |         |
|          | peak   | Batt2  | Oct    |         |         |         |
|          | 7/1    | V      |        |         |         |         |
|          | ends   | T=9/11 | Batts  |         |         |         |
|          | 8/19   | )      | 1-3=   |         |         |         |
|          |        |        | LRC    |         |         |         |
|          | Shunt  | Shunt  |        |         |         |         |
|          | de     | De     | V      |         |         |         |
|          | graded | graded | /T=7/9 |         |         |         |
|          |        |        |        |         |         |         |
|          | Batts  |        |        |         |         |         |
|          | 1      |        |        |         |         |         |
|          | &2=LRC |        |        |         |         |         |
|          |        |        |        |         |         |         |
|          | V/T=4  |        |        |         |         |         |
|          | (      |        |        |         |         |         |
|          | 26Jul) |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | INOP   | N      | D       | ###     | New     |
| *AVHRR** | ominal |        | ominal | EGRADED | Nominal | br      |
|          |        | Scan   |        |         |         | ushless |
|          | UVTRIP | motor  | Rare   | Ty      | 3A-B    | scan    |
|          | turned | s      | Scan   | pically | switch  | motors  |
|          | off    | talled | motor  | erratic | enabled |         |
|          | power  |        | s      | perfo   |         |         |
|          | 7/25   | 14 Apr | urges. | rmance/ |         |         |
|          | at     | 04     | Last   | quality |         |         |
|          | 23:15Z |        |        |         |         |         |
|          |        |        | In     | TCE24   |         |         |
|          | re     |        | cident | OFF     |         |         |
|          | stored |        | 8/9/03 | 4/14    |         |         |
|          | 7/28   |        |        |         |         |         |
|          | at     |        |        | Chan 3B |         |         |
|          | 18:00Z |        |        | only.   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | Opera  | Oper    | O       |         |
| MSU-A1** |        |        | tional | ational | FF/INOP |         |
|          |        |        |        |         |         |         |
|          |        |        | Ch14   | TOAR    | Since   |         |
|          |        |        | inope  | 415 on  | 1       |         |
|          |        |        | rative | primary | 0/30/03 |         |
|          |        |        |        | PLLO    |         |         |
|          |        |        | Ch11   | chans   | Ino     |         |
|          |        |        | inope  | 9-14    | perable |         |
|          |        |        | rative | bias    | Red in  |         |
|          |        |        |        | shift.  | status. |         |
|          |        |        |        |         | S       |         |
|          |        |        |        | TOAR    | urvival |         |
|          |        |        |        | 417 on  | heat    |         |
|          |        |        |        | Backup  | on.     |         |
|          |        |        |        | PLLO    |         |         |
|          |        |        |        | inop    |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | D       |         |         |
|          |        |        |        | iffuser |         |         |
|          |        |        |        | test    |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | 7/16.   |         |         |
|          |        |        |        | n       |         |         |
|          |        |        |        | egative |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | N      | Nominal | Nominal |         |
| MSU-A2** |        |        | ominal |         |         |         |
|          |        |        |        | Space   |         |         |
|          |        |        |        | Pos     |         |         |
|          |        |        |        | ition-2 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | Opera  | Oper    | Nominal |         |
| AMSU-B** |        |        | tional | ational |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Bias   | Space   |         |         |
|          |        |        | in All | Pos     |         |         |
|          |        |        | Chans. | ition-3 |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Motor  | IPD     |         |         |
|          |        |        | surges | reports |         |         |
|          |        |        | ,most  | channel |         |         |
|          |        |        | recent | 8       |         |         |
|          |        |        | 5      | degr    |         |         |
|          |        |        | /19/03 | adation |         |         |
|          |        |        |        |         |         |         |
|          |        |        | IPD    |         |         |         |
|          |        |        | R      |         |         |         |
|          |        |        | eports |         |         |         |
|          |        |        | of     |         |         |         |
|          |        |        | de     |         |         |         |
|          |        |        | graded |         |         |         |
|          |        |        | data   |         |         |         |
|          |        |        | on     |         |         |         |
|          |        |        | Chan-3 |         |         |         |
|          |        |        | since  |         |         |         |
|          |        |        | 4/30   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ### HIRS | INOP   | N      | VA     | Oper    | NOMINAL | ##      |
|          |        | OMINAL | RIABLE | ational |         | ######  |
|          | Filter |        |        |         | 1 Pixel |         |
|          | Wheel  | Opera  | FW     | Occ     | cross   |         |
|          | turned | tional | m      | asional | track   |         |
|          | OFF    |        | ode=Hi | major   | misal   |         |
|          | 10/    | Occa   | Powr   | FM      | ignment |         |
|          | 17/02. | sional |        | surges, | .       |         |
|          | Elect  | loss   | FW     | most    |         |         |
|          | ronics | of     | Heater | recent  |         |         |
|          | OFF    | Fwheel | OFF    |         |         |         |
|          | 7/25   | synch  |        | 4/29/04 |         |         |
|          | b      |        | Fr     |         |         |         |
|          | ecause |        | equent | IPD     |         |         |
|          | of     |        | Filter | Reports |         |         |
|          | UVTRIP |        | Motor  | of      |         |         |
|          |        |        | c      | excess  |         |         |
|          |        |        | urrent | noise   |         |         |
|          |        |        | "mini" | in      |         |         |
|          |        |        | s      | space   |         |         |
|          |        |        | urges, | view    |         |         |
|          |        |        | most   | c       |         |         |
|          |        |        | recent | hannels |         |         |
|          |        |        | 7      | 21May04 |         |         |
|          |        |        | /11/04 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Occa   |         |         |         |
|          |        |        | sional |         |         |         |
|          |        |        | major  |         |         |         |
|          |        |        | FM     |         |         |         |
|          |        |        | c      |         |         |         |
|          |        |        | urrent |         |         |         |
|          |        |        | s      |         |         |         |
|          |        |        | urges, |         |         |         |
|          |        |        | most   |         |         |         |
|          |        |        | recent |         |         |         |
|          |        |        | 6/3/04 |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | #####   |
|  MHS/MIU |        |        |        |         |         | ### At  |
|          |        |        |        |         |         | factory |
|          |        |        |        |         |         |         |
|          |        |        |        |         |         | R       |
|          |        |        |        |         |         | eplaces |
|          |        |        |        |         |         | AMSUB   |
+----------+--------+--------+--------+---------+---------+---------+
| **MSU**  | INOP   | Opera  |        |         |         |         |
|          |        | tional |        |         |         |         |
|          | Scan   |        |        |         |         |         |
|          | Motor  | Scan   |        |         |         |         |
|          | OFF    | motor  |        |         |         |         |
|          | since  | and    |        |         |         |         |
|          | 3      | a      |        |         |         |         |
|          | /12/03 | ntenna |        |         |         |         |
|          |        | pr     |        |         |         |         |
|          | Elect  | oblems |        |         |         |         |
|          | ronics |        |        |         |         |         |
|          | OFF    |        |        |         |         |         |
|          | 7/25   |        |        |         |         |         |
|          | )UV    |        |        |         |         |         |
|          | TRIP). |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SSU**  |        | N      |        |         |         |         |
|          |        | ominal |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DCS**  | N      | N      | N      | Nominal | Nominal |         |
|          | ominal | ominal | ominal |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARR** |        | N      | Opera  | Oper    | Nominal |         |
|          |        | ominal | tional | ational |         |         |
|          |        |        |        |         | A-side  |         |
|          |        |        | A-Side | A-side  |         |         |
|          |        |        |        |         | All AGC |         |
|          |        |        | All    | All AGC | Mode    |         |
|          |        |        | AGC    | Mode    |         |         |
|          |        |        | Mode   |         |         |         |
|          |        |        |        | (B-side |         |         |
|          |        |        | Interm | in FG   |         |         |
|          |        |        | ittent | mode)   |         |         |
|          |        |        | fa     |         |         |         |
|          |        |        | ilures | 243 MhZ |         |         |
|          |        |        | for    | = INOP. |         |         |
|          |        |        | 243MHz |         |         |         |
|          |        |        | A&B    |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARP** |        | OFF    | N      | Nominal | Nominal |         |
|          |        |        | ominal |         |         |         |
|          |        | Power  |        | RCVR    |         |         |
|          |        | F      | RCVR   | B/W = 2 |         |         |
|          |        | ailure | B/W =  |         |         |         |
|          |        |        | 2      |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SEM**  | N      | Opera  | N      | Nominal | Nominal |         |
|          | ominal | tional | ominal |         |         |         |
|          |        |        |        | E-CDEM  | E-CDEM  |         |
|          | El     | El     | E      | -HVPS=5 | -HVPS=2 |         |
|          | ec-CH- | ec-CH- | -CDEM- |         |         |         |
|          | HVPS=4 | HVPS=0 | HVPS=2 | P-CDEM  | P-CDEM  |         |
|          |        |        |        | -HVPS=4 | -HVPS=3 |         |
|          | Pr     | Pr     | P      |         |         |         |
|          | ot-CH- | ot-CH- | -CDEM- |         |         |         |
|          | HVPS=0 | HVPS=0 | HVPS=0 |         |         |         |
|          |        |        |        |         |         |         |
|          | UVTRIP | 1 of 4 |        |         |         |         |
|          | turned | Tele   |        |         |         |         |
|          | off    | scopes |        |         |         |         |
|          | power  | inope  |        |         |         |         |
|          | 7/25,  | rative |        |         |         |         |
|          |        |        |        |         |         |         |
|          | Plan   |        |        |         |         |         |
|          | re     |        |        |         |         |         |
|          | stored |        |        |         |         |         |
|          | 7/29   |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SBUV** |        | De     |        | Oper    | Nominal |         |
|          |        | graded |        | ational |         |         |
|          |        |        |        |         | Anode   |         |
|          |        | G      |        | D       | Mode    |         |
|          |        | rating |        | egraded |         |         |
|          |        | motor  |        | Ozone   |         |         |
|          |        | stuck  |        | data    |         |         |
|          |        | at     |        | r       |         |         |
|          |        | po     |        | eported |         |         |
|          |        | sition |        | TOAR    |         |         |
|          |        | --930  |        | 435     |         |         |
|          |        | on     |        |         |         |         |
|          |        | 7/8/04 |        | Primary |         |         |
|          |        | re     |        | &       |         |         |
|          |        | covery |        | Backup  |         |         |
|          |        | ops    |        | d       |         |         |
|          |        | succ   |        | iffuser |         |         |
|          |        | essful |        | =TOAR   |         |         |
|          |        | 7/9    |        | 426 and |         |         |
|          |        |        |        | TOAR    |         |         |
|          |        | Flex   |        | 433     |         |         |
|          |        | memory |        |         |         |         |
|          |        | 3      |        | Both    |         |         |
|          |        | (giant |        | have    |         |         |
|          |        | step)  |        | Antenna |         |         |
|          |        | ops    |        | deploy  |         |         |
|          |        | sus    |        | p       |         |         |
|          |        | pended |        | roblems |         |         |
|          |        | indefi |        |         |         |         |
|          |        | nitely |        | AMSU    |         |         |
|          |        | on     |        | EMI     |         |         |
|          |        | 1      |        | causing |         |         |
|          |        | 2/2/03 |        | erratic |         |         |
|          |        |        |        | B       |         |         |
|          |        | R      |        | ehavior |         |         |
|          |        | educed |        | in PMT  |         |         |
|          |        | oper   |        | cathod, |         |         |
|          |        | ations |        | range 3 |         |         |
|          |        | s      |        |         |         |         |
|          |        | tarted |        |         |         |         |
|          |        | 6/5/03 |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | N/A    | ON      | ON      |         |
| SADPOS** |        |        |        |         |         |         |
|          |        |        |        | Enabled | ENABLED |         |
|          |        |        |        | MFac    |         |         |
|          |        |        |        | tor=50% |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **T      | N      | N      | TCE26  | Nominal | TCE3H   |         |
| HERMAL** | ominal | ominal | & 15H  |         | Batt 2A |         |
|          |        |        |        | TCE24   | heater  |         |
| Heaters, | UVTRIP |        | Telem  | OFF     | failed  |         |
| louvers  | on     |        | i      | 4/14    | ON,     |         |
|          | 25Jul  |        | nvalid | (AVHRR  | turned  |         |
| TCE's    | p      |        |        | H&L)    | off     |         |
|          | owered |        | TOAR   |         | 8/26/03 |         |
|          | off    |        | 432    |         | TOAR    |         |
|          | and    |        |        |         | 428     |         |
|          | cycle  |        | HIRS   |         |         |         |
|          | p      |        | FW     |         | AMSU-A1 |         |
|          | owered |        | Heat   |         | s       |         |
|          | v      |        | OFF    |         | urvival |         |
|          | arious |        |        |         | heaters |         |
|          | TCE's. |        | TCE2   |         | on      |         |
|          | N      |        | 4L&25L |         | 1       |         |
|          | ominal |        | (HIRS  |         | 0/29/03 |         |
|          | config |        | &      |         |         |         |
|          | re     |        | AVHRR) |         |         |         |
|          | stored |        | failed |         |         |         |
|          | 27Jul  |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
|          |        |        |        |         |         |         |
|          |        |        | RCE    |         |         |         |
|          |        |        | ther   |         |         |         |
|          |        |        | mostat |         |         |         |
|          |        |        | failed |         |         |         |
|          |        |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N   |
|          | *N12** | *N14** | *N15** |         |         | OAA-N18 |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-12 On 25 July at 23:18Z battery 2 voltage on N12 fell to 19.05
volts while exiting its orbital eclipse. This value was

below the 19.25 volts threshold for triggering autonomous power survival
safestate and STESM routines on the spacecraft. (Note: Battery 1 also
fell to a similar value at the same time but it was confirmed in
telemetry that battery 2 actually triggered the safestate mode. N12 has
only 2 batteries.) When this trigger was reached, Safestate mode
autonomously induced the spacecraft to perform an electrical power load
shed that include 62 items including the only two remaining operational
payloads on N12; SEM and AVHRR. In addition, this safing routine changed
the N12 battery V/T levels to 2 (from 4) stopped the recursive stored
command table from running and powered off most TCE's then began cycling
power on and off to some of the more critical TCE's. A number of
interrelated situations contributed to this anomaly including the
following: (1) The relatively minimal amount of engineering data
available for analysis from N12 because of its limited number of daily
supports. (2) The possibility that the battery cells have degraded over
the past year. (3) Concerns about degraded shunt performance and
possible shunt failure in July 2003 that resulted in the need to reduce
power generation by backing off the solar array offset to -60 degrees
(shunt failure is a mission ending anomaly, refer to N10). Shunt load
reduction via reduced power generation was augmented by concurrently
maintaining an increased power demand on the bus (and off the shunts) by
keeping two inoperative payloads (HIRS and MSU) powered on for use as
"pseudo resisters". This configuration did indeed significantly reduce
shunt stress during the past year but slowly led to a lower than optimum
charge rate during the N12 eclipse season (which started in mid-April,
peaked in early July 04 began to wane in mid-July and ends in
mid-August). During this eclipse season this reduced charge rate and
increased consumption resulted in orbital minimum battery voltages
(which occur just before exiting darkness) that while very stable and
predictable, were less than 0.3 volt above the safe state trigger
threshold, therefore providing a minimal margin for error in the event
of unexpected power demands. (4) A Wallops pass on 25 July at 22:00Z
where this margin was breached when commanding problems at the CDA
resulted in an inability to turn off STX-2 before the spacecraft faded.
This additional load was enough to bring the minimum voltage down to
trigger the safestate situation which was then detected on the next
scheduled pass on 26 Jul at 10:25Z.

Recovery operations began on 26 Jul with a team of NOAA, NASA and EMOSS
engineers performing in depth analysis from data obtained on a
significant number of call up passes and discussing various operational
options. The following summarizes the options that were implemented: At
18:30Z, the V/T level was commanded back to its nominal value of 4 (from
2). On 26 Jul at 20:10Z the Safe State trigger word was reset and the
recursive table re-initiated. On 27 Jul at 13:15Z the TCE cycling
process was stopped and on the next pass at 14:55Z the all TCE's were
commanded back to their nominal configuration. Throughout these passes
STIP recorders were dumped and engineering data analyzed to assess the
impact of each operation on the power situation which ultimately drove
the next reconfiguration decision. On 27 July at 19:55 the solar array
offset was decreased to -50 degrees (from -60) in order to increase
power generation. On 28 July at 18:05Z, the AVHRR was powered back on
with imagery returning to normal (ILLUSTRATION 1) and the triggers for
battery undervoltage trip were lowered to 18.7 (from 19.25 volts) thus
providing additional margin for unexpected power draws (like STX-2
remaining on). Additional analysis will be conducted before the SEM will
be powered back on but that is not expected to occur until 29 July at
the earliest. Into the foreseeable future, turning HIRS and MSU back on
for power consumption purposes is not expected although this too may
change as N12's eclipse season comes to an end in the next 2-3 weeks.
EMOSS engineers Jon Woodward, Jim Walters, Carl Gliniak Angelique Riley,
Jim Sheperd and Jeff Devine were all involved in these recovery
operations. While the spacecraft and its two operational payloads can
still be considered relatively nominal at the present time
(notwithstanding additional recovery operations and 15 years on-orbit)
operational concepts regarding N12 power balance, shunt degradation and
battery capacity concerns remain to be completely worked out which may
be further complicated by the impending end of eclipse season. Once
eclipse season ends, concerns about Attitude Control operational
concepts during low sun angle season (starting early Sept) will also
need to be addressed. In response to this anomaly, and the acknowledged
importance of the N12 AVHRR, scheduling will be increasing the number of
N12 passes to 4 per day (from its current 1-2) effective immediately.

NOAA-14: Prior to the N12 power anomaly, on Thursday, 22 July, EMOSS
engineers Jeff Devine and Carl Gliniak detected a "power starvation"
potential on N14 that was/is similar to that on N12. In both cases, the
solar array has been "backed off" significantly and inoperative payloads
have been left on as power draws in order to protect a degraded shunt
against overloading. (N14 actually experienced a major anomaly because
of overloaded shunt in April of 2003.) In the case of N14, which became
a permanently eclipsing spacecraft in April of 2004, it has 3 batteries
(vs N12's two) with which to provide the extra power when needed and
those batteries have maintained a better "margin or error" of at least
.75 volt above undervoltage threshold since it began eclipsing (N12 was
approx 0.25). Even though N14 is maintaining a better margin of error
and has an extra battery, the concern regarding N14 is that it is now
operating at record low battery voltages and will continue eclipsing
with lower power generation and higher loads than when first
reconfigured in May 2003. The concern is that this could lead to a
chronic undercharging that could subtly lead to increased undervoltage
trip potential. Therefore, EMOSS engineering have requested additional
analysis by NASA engineers and solicited their opinion regarding the
necessity of increasing power, decreasing loading, changing VT or
lowering the UV Trip threshold number (which is current 19.4) to 19.0.
Carl Gliniak is POC for this issue. See illustration 2-3.

NOAA-14: (cont)

Because of concerns about SBUV giant step operations as a source of the
grating motor becoming stuck, the giant step operation has been
permanently removed from the stored command table. No other
reconfigurations or plans regarding this payload are currently under
discussion with EMOSS engineers. Jim Walters is POC.

NOAA-15: In support of TOAR 432 investigation (TIP channel 224-227
failure), the EMOSS team instituted an operation which

performed one second dwells for one orbit each on TIP-2 channels 224,
225, 226, 227, 228, 229, 230, and 231. The EMOSS team had long ago
detected and confirmed that channels 224, 226 and 227 had failed while
228-231 remained nominal. Since all of these channels are on the same
mux the primary question for investigating this anomaly is whether
channel 225 is working or not. The main problem with this determination
is that channel 225 does not have any associated telemetry. Therefore,
it is hoped that by using the 1 second dwell mode and detecting any
changes of any kind across this channel theories as to the origin of
this anomaly can be pursued or eliminated. This operation consisted of
generating and loading a macro to place each channel in 1 second dwell
mode for one orbit then switching to the next channel. This was done
over a single JDAY (209). Jon Woodward and Angelique Riley were EMOSS
POC's for the operation.

The N15 AMSU-B were nominal during the past reporting period. However,
the N15 AVHRR scan motor experienced a current surge of 15-20 mAmps on
25 July starting at approximately 11:30Z and the current remains at this
elevated level. Imagery does not appear to have been impacted and no
reports of imagery degradation have been received by EMOSS engineers and
synch deltas remain relatively stable. N15 AVHRR component temps are in
a strong uptrend which is seasonal in nature and has not yet approached
record high levels. EMOSS will be maintaining a close watch on this
subsystem in the coming days. Jim Walters is POC. See illustrations 4-6

The N15 HIRS continued its typical pattern of experiencing mini filter
motor current surges followed by a recovery after several days. No
reports of imagery degradation have been received by EMOSS engineers.
Jim Walters is POC for this issue (illustration 7).

N15 eclipse season is rapidly waning, battery voltages are nominal at
this time (illustration 8)

NOAA-16: N16 AVHRR remained erratic and generally more elevated than in
previous weeks with numerous reports of bar codes being received and
detected by EMOSS engineers and pegged synch delta values at all times
since 15 July. Conversely, the AVHRR component temperatures remain
generally stable and nominal. The MIRP rephrase operations performed
once per orbit continue to be very successful at increasing the
percentage of good imagery over the previous method of rephasing one per
day. However, as long as the scan motor current remains elevated and
synch delta always pegged imagery will be impacted. (See illustrations
9-12.)

NOAA-17: No changes since previous report. A new matrix for CPU single
event upsets is being generated and the information

will be included in this report as soon as it is completed.

NOAA-N No changes since previous report.

MISC: New computers were received by EMOSS engineers this week. They
will take some getting used to....

This is the final weekly report to be published under the EMOSS-1
contract

![](media/image1.png){width="3.25in" height="5.439583333333333in"}

[28 July 19:30Z]{.underline}

[Illustration 1: N12 HRPT Image following 28 July AVHRR turn-on (back to
nominal operations)]{.underline}

![](media/image2.wmf){width="7.615277777777778in" height="5.20625in"}

Illustration 2: N14 Battery Voltage Analysis

![](media/image3.wmf){width="8.125694444444445in"
height="6.157638888888889in"}

Illustration 3: N14 Battery Trend Analysis

(Record low sustained minimum voltage which will continue indefinitely
since eclipse season is now permanent)

![](media/image4.wmf){width="5.993055555555555in"
height="4.432638888888889in"}

Illustration 4: N15 AVHRR Scan Motor & Imagery Analysis during scan
motor surge

![](media/image5.png){width="1.375in" height="3.3854166666666665in"}
![](media/image6.png){width="1.375in" height="3.384027777777778in"}
![](media/image7.png){width="1.125in" height="3.3583333333333334in"}

J-208 J-209 J-210

12:00Z 21:45Z 16:40Z

![](media/image8.wmf){width="7.747916666666667in"
height="6.895833333333333in"}

Illustration 5: N15 AVHRR Synch Delta Analysis Recent and Past

(generally stable during this most recent scan motor current surge)

![](media/image9.wmf){width="8.002777777777778in"
height="6.0569444444444445in"}

[Illustration 6: N15 AVHRR Component Temps Analysis]{.underline}

(A strong but seasonal uptrend with several degrees to go before
reaching new highs)

![](media/image10.wmf){width="0.28888888888888886in"
height="0.21875in"}![](media/image10.wmf){width="0.28888888888888886in"
height="0.21875in"}

![](media/image11.wmf){width="8.002777777777778in"
height="6.0569444444444445in"}

[Illustration 7: N15 HIRS Analysis (yet another mini surge)]{.underline}

![](media/image12.wmf){width="7.747916666666667in"
height="5.879166666666666in"}

[Illustration 8: N15 Battery Voltage Analysis]{.underline}

[(improving daily as eclipse season wanes.)]{.underline}

![](media/image13.wmf){width="7.625694444444444in"
height="4.663888888888889in"}

[Illustration 9: N16 AVHRR Scan Motor Analysis]{.underline}

[(somewhat degraded since previous report)]{.underline}

![](media/image14.wmf){width="0.9993055555555556in"
height="7.588888888888889in"}
![](media/image15.png){width="0.9263888888888889in"
height="7.540972222222222in"}
![](media/image16.wmf){width="1.104861111111111in" height="7.5875in"}

28 Jul 28 Jul 28 Jul

02:00Z 07:30Z 17:30Z

Illustration 10: N16 AVHRR Imagery Analysis

(would be a lot worse if MIRP rephasing wasn't done each orbit)

![](media/image17.wmf){width="7.748611111111111in"
height="5.972916666666666in"}

[Illustration 11: N16 Synch Delta Analysis]{.underline}

[(pegged for a couple of weeks, impacting imagery]{.underline}

![](media/image18.wmf){width="7.622916666666667in"
height="7.722222222222222in"}

[Illustration 12: N16 AVHRR Thermal Analysis]{.underline}

[(stable and nominal)]{.underline}

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING July 23, 2004

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

  FRI. 07/16   -559 msec   -026 msec   -045 msec   +033 msec   -005 msec

  SAT. 07/17   -558 msec   -028 msec   -046 msec   +032 msec   -005 msec

  SUN. 07/18   -557 msec   -026 msec   -047 msec   +033 msec   -007 msec

  MON. 07/19   -558 msec   -025 msec   -048 msec   +032 msec   -007 msec

  TUE. 07/20   -557 msec   -024 msec   -049 msec   +032 msec   -006 msec

  WED. 07/21   -563 msec   -026 msec   -050 msec   +032 msec   -007 msec

  THU. 07/22   -559 msec   -025 msec   -048 msec   +032 msec   -008 msec
  ------------ ----------- ----------- ----------- ----------- -----------

EMOSS POC for this chart is JIM SHEPHERD

NOAA-12 Autonomous -500mSec jump on 17 Jun

Daily ETCUP bias of +6.5 mSec started on 12/10/03.

NOAA-14: As of 1223/03 the TIP clock is corrected daily by ---7.0 msec
to compensate for drift.

Subtracted 150 mSecs on 30 June

NOAA-15: As of 04/23/03 the TIP clock is corrected daily by ---8 msec to
compensate for drift.

Added 100 msec to spacecraft command clock on 10 June 03.

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

Subtracted 100 msec from spacecraft command clock on 23 Dec 03.

NOAA-17: As of 12/23/03 the TIP clock is corrected daily by --3 msec to
compensate for drift.

Added 125 Msecs3 Feb 04.

![](media/image19.wmf){width="6.875in" height="4.079166666666667in"}

***CPU Single Event Upsets, new matrix under construction***

***PACS DATA AVAILABILITY (%)***

Not available in time for this publication

**[DTR Inf. (\*):]{.underline}**

NOAA-12 DTR 5A -Inoperative.

DTR 2A/B -Occasionally noisy and short

DTR 1A/B - Inoperative

NOAA-14 DTR 4A/B -Inoperative.

DTR 3B -Unreliable playbacks, Removed from operations.

DTR 2A -Inoperative, DOY/200

NOAA-15 DTR 5A/B - Inoperative

NOAA-16 DTR 5A/B -Inoperative

DTR 3A -safe state change 1B

DTR 4B --Inoperative 1/12/03

NOAA-17 DTR 5A/B-Inoperative 2/16/03 Anomaly

**[Acronyms:]{.underline}**

DL -- Drop lock(s) PE - Parity Error(s) DQR - Data Quality Report

BE - Bit Error(s) DAR - Data Accountability Report MFR - Multi-Function
Receiver