**POLAR Spacecraft Status As of: Tues, 20 Apr 04 16:00 EST**

*changes from last week in bold border)*

+----------+--------+--------+--------+--------+---------+---------+
| **Subs   | ##     | **NOAA | **NOAA | **NOAA | **NOA   | ##### N |
| ystem/** | ### NO | -12D** | -14J** | -15K** | A-16L** | OAA-17M |
|          | AA-11H |        |        |        |         |         |
| **Com    |        | AM:    | AM:    | AM:    | PM:     | AM:     |
| ponent** | PM:    | AN     | AN     | AN     | A       | A       |
|          | AN     | =1644Z | =1930Z | =1837Z | N=1437Z | N=2220Z |
|          | =2304Z |        |        |        |         |         |
|          |        | STIP   | STIP   | GAC    | GAC&LAC | GAC&LAC |
|          | STIP   | data   | data   | data   | data    | data    |
|          | data   | only   | only   | only   |         |         |
|          | only   |        |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **LA     | 09     | 05     | 12     | 05     | 0       | 6/24/02 |
| UNCHED** | /23/88 | /14/91 | /30/94 | /13/98 | 9/21/00 |         |
+----------+--------+--------+--------+--------+---------+---------+
| **CNTL   | OBP2   | OBP2   | OBP2   | OBP2   | OBP2    | OBP2    |
| OBP**    |        |        |        |        |         |         |
|          |        |        | OBP1   |        |         | CPU1&2  |
|          |        |        | inope  |        |         | Errr    |
|          |        |        | rative |        |         | TOAR    |
+----------+--------+--------+--------+--------+---------+---------+
| **BUS**  | A-BUS  | B-BUS  | B-BUS  | B-BUS  | B-BUS   | B-BUS   |
|          |        |        |        |        |         |         |
|          | XSU-1  | XSU-1  | XSU2   | XSU-1  | XSU-1   | XSU-1   |
|          |        |        | (XSU1  |        |         |         |
|          |        |        | inop)  |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **BUS    | NO     | NO     | NO     | NO     | NO      | NO      |
| VETO**   |        |        |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| *        | [RGYRO | [N     | [N     | [N     | #####   | #####   |
| *ADACS** | Mode]  | ominal | ominal | ominal | # [Nomi | # [Nomi |
|          | {.unde | Mode]  | Mode]  | Mode]  | nal Mod | nal Mod |
|          | rline} | {.unde | {.unde | {.unde | e]{.und | e]{.und |
|          |        | rline} | rline} | rline} | erline} | erline} |
|          | (Y,    |        |        |        |         |         |
|          | Z      | Since  | Rgm    | Rg     | R       | R       |
|          | -Gyros | 2 Apr  | ode=Di | mode=M | gmode=D | gmode=D |
|          | F      |        | sabled | onitor | isabled | isabled |
|          | ailed) | Gyro   |        |        |         |         |
|          | R      | cha    | Gyro   | Gyro-3 | Gyro    | Gyro    |
|          | educed | ns=XYZ | cha    | Of     | ch      | ch      |
|          | Gyro   |        | ns=XYZ | f/Anom | ans=AAA | ans=AAB |
|          | S/W.   | RG     |        |        |         |         |
|          |        | mode=M | SS     | Gyro   | Gyro3   | D       |
|          | X &S   | onitor | check  | cha    | des     | eselect |
|          | gyros  |        | Di     | ns=AAB | elected | Gyro3   |
|          | only   |        | sabled |        |         | TOAR    |
|          |        |        | when   | N2 Low | Gyro3   | 436     |
|          |        |        | mo     | PSI    | TOAR    |         |
|          |        |        | de=YGC | i      | 427     |         |
|          |        |        |        | nvalid |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | **     |         |         |
|          |        |        |        | [RGyro |         |         |
|          |        |        |        | Test   |         |         |
|          |        |        |        | In     |         |         |
|          |        |        |        | Pr     |         |         |
|          |        |        |        | ogress |         |         |
|          |        |        |        | until  |         |         |
|          |        |        |        | 4      |         |         |
|          |        |        |        | /22]{. |         |         |
|          |        |        |        | underl |         |         |
|          |        |        |        | ine}** |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **RXO**  | PRI    | PRI    | PRI    | PRI    | PRI     | PRI     |
|          |        |        |        |        |         |         |
|          | BU     | BU     | BU     | daily  | Daily   | Daily   |
|          | random | random | random | bias   | Bias    | Bias    |
|          | e      | e      | e      | -8     | --5.5   | --3     |
|          | nables | nables | nables | mSec   | mS      | mSec    |
|          |        |        | daily  |        |         |         |
|          | bias   | daily  | bia    |        |         | added   |
|          | +70mS: | bi     | s--7.0 |        |         | 125 mS  |
|          | OBPC   | as+6.5 | mS     |        |         | 2/24    |
|          |        | mS     |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **CLOCK  | 2      | 2      | 2      | 2      | 2       | 2       |
| DIV**    |        |        |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **MIRP** | ON     | Ex     | Ex     | Ex     | E       | E       |
|          |        | ternal | ternal | ternal | xternal | xternal |
|          |        | Synch  | Synch  | Synch  | Sync    | Sync    |
|          |        |        |        | R      |         |         |
|          |        | R      | R      | ephase | Rephase | Rephase |
|          |        | ephase | ephase | Daily. | 0430Z   | Enabled |
|          |        | E      | 0730   |        | Daily   |         |
|          |        | nabled | Daily  |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **TIP    | 1      | 1      | 1      | 2      | 1       | 1       |
| SIDE**   |        |        |        |        |         |         |
|          |        |        |        | ###### | Analog  |         |
|          |        |        |        | ## [Si | telem   |         |
|          |        |        |        | nce 4/ | d       |         |
|          |        |        |        | 24/03] | rifting |         |
|          |        |        |        | {.unde |         |         |
|          |        |        |        | rline} |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | Ch     |         |         |
|          |        |        |        | annels |         |         |
|          |        |        |        | 224    |         |         |
|          |        |        |        | -227   |         |         |
|          |        |        |        | i      |         |         |
|          |        |        |        | nvalid |         |         |
|          |        |        |        | TOAR   |         |         |
|          |        |        |        | 432    |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **DTRs** | 1A,    | 1A, 3, | 1, 2B, | 1, 2,  | 1       | 1,2,3,4 |
|          | 2B, 3, | 4, 5B  | 3A, 5  | 3, 4   | ,2,3,4A |         |
|          | 4A     |        | Safe   | Saf    |         | Safes   |
|          | Safes  | Safe   | state- | estate | Sa      | tate=1B |
|          | tate - | state- | 1B     | 1B EOT | festate |         |
|          | 2B,    | 1B     |        |        | 3A      | D       |
|          |        |        |        | DTR-5  |         | TR2-SSR |
|          |        | 1B     |        | test   | 4B TOAR |         |
|          |        | Taken  |        | 3/1/04 | 418     | DTR5    |
|          |        | out of |        |        |         | TOAR    |
|          |        | s      |        | inconc | (STIP   | 420     |
|          |        | ervice |        | lusive | only)   |         |
|          |        | 6 Apr  |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **VTX**  | OFF    | #1 ON  | OFF    | #1 ON  | INOP    | #2 ON   |
|          |        |        |        |        |         |         |
| (APT     |        | 137.50 | Since  | 137.50 | OFF     | 137.62  |
| data)    |        | MHZ    | 8      | MHZ    | since   | MHZ     |
|          |        |        | /14/02 |        | 1       |         |
|          |        |        |        |        | 1/15/00 |         |
+----------+--------+--------+--------+--------+---------+---------+
| **BTX**  | #2     | #1     | #2     | #1     | #1      | ###     |
|          |        |        |        |        |         | #### #2 |
|          | 137.77 | 136.77 | 137.77 | 137.35 | 137.35  |         |
|          | MHZ    | MHZ    | MHZ    | MHZ    | MHZ     | 137.77  |
|          |        |        |        |        |         | MHZ     |
+----------+--------+--------+--------+--------+---------+---------+
| **STX**  | 3 --   | 1 --   | 3 --   | 1, 2,  | 1 --    | 3 --    |
|          | TIP    | HRPT;  | HRPT   | 3 -    | HRPT;   | HRPT    |
| #        |        |        |        | deg    |         |         |
| 1=1698.0 | 1,2 -  | 2,3 -  | 2, 1   | raded; | 2--     | TOAR424 |
| mhz      | Pl     | Pl     | --     |        | Pl      | low     |
|          | ayback | ayback | Pl     | ##     | ayback; | power   |
| #        |        |        | ayback | #### 2 |         |         |
| 2=1702.5 |        |        |        |  Omni- | 4 --    | 1&2     |
| mhz      |        |        |        | -HRPT; | P       | P       |
|          |        |        |        |        | layback | layback |
| #        |        |        |        | #      |         |         |
| 3=1707.0 |        |        |        | #####  | 3 low   | 4 --    |
| mhz      |        |        |        | 4- Pla | power   | TIP     |
|          |        |        |        | yback  | unused  |         |
| #        |        |        |        |        |         | S       |
| 4=2247.5 |        |        |        |        |         | valbard |
| mhz      |        |        |        |        |         | tests   |
+----------+--------+--------+--------+--------+---------+---------+
| #        | [Array | [Ar    | [Array | [Array | [Array  | [Array  |
| ## POWER | Off    | rayOff | Off    | Off    | Off     | Off.    |
|          | -30]   | -60]   | -55]   | -45]   | -4      | --4     |
| (Array   | {.unde | {.unde | {.unde | {.unde | 0]{.und | 0]{.und |
| offset,  | rline} | rline} | rline} | rline} | erline} | erline} |
| charge   |        |        |        |        |         |         |
| and      | Since  | since  | Since  | Since  | Since   | Since   |
| eclipse  | 6      | 7      | 8      | 1      | 7/16/02 | 1/29/04 |
| states,  | /19/02 | /30/03 | /21/03 | /25/01 |         |         |
| sun      |        |        |        |        | Eclipse | Eclipse |
| angle)   | E      | E      | E      | FULL   | all     | all     |
|          | clipse | clipse | clipse | SUN    | year    | year    |
| Solar    | all    | Season | all    |        |         |         |
| Eclipse  | year   | starts | year   | Sun    | Sun     | Sun     |
|          |        | 21 Apr |        | Angle  | Angle   | Angle   |
| 19 April | Sun    |        | Sun    | 23     | 59      | at 68   |
| 12:0     | angle  | Sun    | Angle  |        |         |         |
| 0-15:00Z | 80     | Angle  | at 35  | u      | Steady  | uptrend |
|          |        | at 27  |        | ptrend | Trend   | to 72   |
| No       | U      | u      | up     | to 32  |         | in May  |
| impacts  | ptrend | ptrend | trend  |        | Batts   |         |
|          | to 82  | to 38  | to 43  | mid    | 1-3=    | Batts   |
|          | Ba     |        |        | June   | LRC     | 1-3=    |
|          | tts1,2 | Sun    | Batts  |        |         | LRC     |
|          | ,3=LRC | sensor | 1-3=   | Batts  | V/T=4/8 |         |
|          |        | s      | LRC    | 1-3=   |         | V/T=    |
|          | VT1    | hading |        | LRC    |         | 4/8     |
|          | ,2=6/8 |        | Batts  |        |         |         |
|          |        | po     | 1&3V/  | V      |         |         |
|          | VT3 =  | ssible | T=8/11 | /T=7/9 |         |         |
|          | 8/11   | until  |        |        |         |         |
|          |        | 4/04   | Batt2  |        |         |         |
|          | Charge |        | V      |        |         |         |
|          | state  | Batts  | T=9/11 |        |         |         |
|          | safe   | 1      | )      |        |         |         |
|          |        | &2=LRC |        |        |         |         |
|          | trip   |        | Shunt  |        |         |         |
|          | di     | V/T=4  | De     |        |         |         |
|          | sabled |        | graded |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| *        | INOP   | N      | DE     | N      | D       | ###     |
| *AVHRR** |        | ominal | GRADED | ominal | EGRADED | Nominal |
|          | Failed |        |        |        |         |         |
|          | power  | Yaw    | No     | Rare   | F       | 3A-B    |
|          | s      | bias   | image  | Scan   | requent | switch  |
|          | upply. | under  | bar    | motor  | bar     | enabled |
|          | Off    | i      | codes  | s      | code    |         |
|          | since  | nvesti | 3/30.  | urges. | i       |         |
|          | 1994   | gation | First  | Last   | magery, |         |
|          |        |        | time   |        | scan    |         |
|          |        |        | since  | In     | motor   |         |
|          |        |        | May 03 | cident | synch   |         |
|          |        |        |        | 8/9/03 | delta   |         |
|          |        |        | STAT   |        | pegged. |         |
|          |        |        | US=RED | On     |         |         |
|          |        |        |        | Watch  | TCE24   |         |
|          |        |        |        | List   | OFF     |         |
|          |        |        |        |        | 4/14    |         |
|          |        |        |        |        |         |         |
|          |        |        |        |        | Chan 3B |         |
|          |        |        |        |        | only.   |         |
+----------+--------+--------+--------+--------+---------+---------+
| **A      |        |        |        | ON     | ON      | O       |
| MSU-A1** |        |        |        |        |         | FF/INOP |
|          |        |        |        | Ch14   | TOAR    |         |
|          |        |        |        | inope  | 415 on  | Since   |
|          |        |        |        | rative | primary | 1       |
|          |        |        |        |        | PLLO    | 0/30/03 |
|          |        |        |        | Ch11   | chans   |         |
|          |        |        |        | inope  | 9-14    | Ino     |
|          |        |        |        | rative | bias    | perable |
|          |        |        |        |        | shift.  | Red in  |
|          |        |        |        |        |         | status. |
|          |        |        |        |        | TOAR    | S       |
|          |        |        |        |        | 417 on  | urvival |
|          |        |        |        |        | Backup  | heat    |
|          |        |        |        |        | PLLO    | on.     |
|          |        |        |        |        | inop    | TOAR    |
|          |        |        |        |        |         | 431     |
+----------+--------+--------+--------+--------+---------+---------+
| **A      |        |        |        | ON     | ON      | ON      |
| MSU-A2** |        |        |        |        |         |         |
|          |        |        |        |        | Space   |         |
|          |        |        |        |        | Pos     |         |
|          |        |        |        |        | ition-2 |         |
+----------+--------+--------+--------+--------+---------+---------+
| **       |        |        |        | ON     | ON      | ON      |
| AMSU-B** |        |        |        |        |         |         |
|          |        |        |        | Bias   | Space   |         |
|          |        |        |        | in All | Pos     |         |
|          |        |        |        | Chans. | ition-3 |         |
|          |        |        |        |        |         |         |
|          |        |        |        | Motor  |         |         |
|          |        |        |        | s      |         |         |
|          |        |        |        | urges, |         |         |
|          |        |        |        | most   |         |         |
|          |        |        |        | recent |         |         |
|          |        |        |        | 2      |         |         |
|          |        |        |        | /16/03 |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| ### HIRS | #####  | INOP   | N      | VA     | NOMINAL | NOMINAL |
|          | ## OFF |        | OMINAL | RIABLE |         |         |
|          |        | Filter |        |        | Filter  | 1 Pixel |
|          | ####   | Wheel  | Opera  | FW     | Motor   | cross   |
|          | #### F | turned | tional | m      | current | track   |
|          | ilter  | OFF    |        | ode=Hi | profile | misal   |
|          | Wheel  | 10/    | Occa   | Powr   | change  | ignment |
|          | Failed | 17/02. | sional |        | 4 Mar   | .       |
|          |        | Elect  | loss   | MAJOR  |         |         |
|          |        | ronics | of     | Filter | Some    |         |
|          |        | On     | Fwheel | Motor  | c       |         |
|          |        |        | synch  | C      | hannels |         |
|          |        |        |        | urrent | d       |         |
|          |        |        |        | surge. | egraded |         |
|          |        |        |        | FW     | since   |         |
|          |        |        |        | Heater | 11 Apr  |         |
|          |        |        |        | ON     |         |         |
|          |        |        |        | 19Apr  |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | FW     |         |         |
|          |        |        |        | Synch  |         |         |
|          |        |        |        | &      |         |         |
|          |        |        |        | Period |         |         |
|          |        |        |        | M      |         |         |
|          |        |        |        | onitor |         |         |
|          |        |        |        | e      |         |         |
|          |        |        |        | rratic |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **MSU**  | ###    | INOP   | ON     |        |         |         |
|          | # INOP |        |        |        |         |         |
|          |        | Scan   | Scan   |        |         |         |
|          | OFF,   | Motor  | motor  |        |         |         |
|          | A      | OFF    | and    |        |         |         |
|          | ntenna | since  | a      |        |         |         |
|          | Failed | 3      | ntenna |        |         |         |
|          |        | /12/03 | pr     |        |         |         |
|          |        |        | oblems |        |         |         |
|          |        | Elect  |        |        |         |         |
|          |        | ronics |        |        |         |         |
|          |        | ON.    |        |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **SSU**  | ON     |        | ON     |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **DCS**  | ON     | ON     | ON     | ON     | ON      | ON      |
|          |        |        |        |        |         |         |
|          |        |        |        |        | Nominal | Nominal |
+----------+--------+--------+--------+--------+---------+---------+
| **SARR** | ON     |        | ON     | ON-A   | ON-A    | ON-A    |
|          |        |        |        |        |         |         |
|          | Low    |        |        | All    | All AGC | Nominal |
|          | signal |        |        | AGC    | Mode    |         |
|          |        |        |        | Mode   |         | All AGC |
|          |        |        |        |        | (B-side | Mode    |
|          |        |        |        | Interm | in FG   |         |
|          |        |        |        | ittent | mode)   |         |
|          |        |        |        | fa     |         |         |
|          |        |        |        | ilures | 243 MhZ |         |
|          |        |        |        | for    | INOPE   |         |
|          |        |        |        | 243MHz | RATIVE. |         |
|          |        |        |        | A&B    |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **SARP** | ON     |        | OFF    | ON     | ON      | ON      |
|          |        |        |        |        |         |         |
|          | N      |        | Failed | N      | Nominal | Nominal |
|          | ominal |        | Power  | ominal |         |         |
|          |        |        | Supply |        | RCVR    |         |
|          |        |        |        | RCVR   | B/W = 2 |         |
|          |        |        |        | B/W =  |         |         |
|          |        |        |        | 2      |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **SEM**  |        | ON     | ON     | ON     | ON      | ON      |
|          |        |        |        |        |         |         |
|          |        | El     | El     | N      | Nominal | Nominal |
|          |        | ec-CH- | ec-CH- | ominal |         |         |
|          |        | HVPS=4 | HVPS=0 |        | E-CDEM  | E-CDEM  |
|          |        |        |        | E      | -HVPS=5 | -HVPS=2 |
|          |        | Pr     | Pr     | -CDEM- |         |         |
|          |        | ot-CH- | ot-CH- | HVPS=2 | P-CDEM  | P-CDEM  |
|          |        | HVPS=0 | HVPS=0 |        | -HVPS=4 | -HVPS=3 |
|          |        |        |        | P      |         |         |
|          |        |        | 1 of 4 | -CDEM- |         |         |
|          |        |        | Tele   | HVPS=0 |         |         |
|          |        |        | scopes |        |         |         |
|          |        |        | inope  |        |         |         |
|          |        |        | rative |        |         |         |
|          |        |        |        |        |         |         |
|          |        |        | Auto   |        |         |         |
|          |        |        | nomous |        |         |         |
|          |        |        | reset  |        |         |         |
|          |        |        | and    |        |         |         |
|          |        |        | com    |        |         |         |
|          |        |        | manded |        |         |         |
|          |        |        | re     |        |         |         |
|          |        |        | covery |        |         |         |
|          |        |        | 12     |        |         |         |
|          |        |        | /16/03 |        |         |         |
+----------+--------+--------+--------+--------+---------+---------+
| **SBUV** | INOP   |        | Reco   |        | ON      | ON      |
|          |        |        | vering |        |         |         |
|          | G      |        |        |        | D       | Nominal |
|          | rating |        | Flex   |        | egraded |         |
|          | motor  |        | memory |        | Ozone   | Anode   |
|          | OFF    |        | 3      |        | data    | Mode    |
|          | since  |        | (giant |        | r       |         |
|          | 5      |        | step)  |        | eported |         |
|          | /29/03 |        | ops    |        | TOAR    |         |
|          |        |        | sus    |        | 435     |         |
|          | Elect  |        | pended |        |         |         |
|          | ronics |        | indefi |        | Primary |         |
|          | and    |        | nitely |        | &       |         |
|          | Heater |        | on     |        | Backup  |         |
|          | remain |        | 1      |        | d       |         |
|          | ON     |        | 2/2/03 |        | iffuser |         |
|          |        |        |        |        | =TOAR   |         |
|          |        |        | R      |        | 426 and |         |
|          |        |        | educed |        | TOAR    |         |
|          |        |        | oper   |        | 433     |         |
|          |        |        | ations |        |         |         |
|          |        |        | s      |        | Both    |         |
|          |        |        | tarted |        | have    |         |
|          |        |        | 6/5/03 |        | Antenna |         |
|          |        |        |        |        | deploy  |         |
|          |        |        |        |        | p       |         |
|          |        |        |        |        | roblems |         |
|          |        |        |        |        |         |         |
|          |        |        |        |        | AMSU    |         |
|          |        |        |        |        | EMI     |         |
|          |        |        |        |        | causing |         |
|          |        |        |        |        | erratic |         |
|          |        |        |        |        | B       |         |
|          |        |        |        |        | ehavior |         |
|          |        |        |        |        | in PMT  |         |
|          |        |        |        |        | cathod, |         |
|          |        |        |        |        | range 3 |         |
+----------+--------+--------+--------+--------+---------+---------+
| **       |        |        |        | N/A    | ON      | ON      |
| SADPOS** |        |        |        |        |         |         |
|          |        |        |        |        | ENABLED | ENABLED |
|          |        |        |        |        |         |         |
|          |        |        |        |        | MFactor |         |
|          |        |        |        |        | =50%    |         |
+----------+--------+--------+--------+--------+---------+---------+
| **T      | N      | N      | N      | TCE26  | Nominal | TCE3H   |
| HERMAL** | ominal | ominal | ominal | & 15H  |         | Batt 2A |
|          |        |        |        |        | TCE24   | heater  |
| Heaters, |        |        |        | Telem  | OFF     | failed  |
| louvers  |        |        |        | i      | 4/14    | ON,     |
|          |        |        |        | nvalid | (AVHRR  | turned  |
| TCE's    |        |        |        | since  | H&L)    | off     |
|          |        |        |        | 12     |         | 8/26/03 |
|          |        |        |        | /23/03 |         | TOAR    |
|          |        |        |        |        |         | 428     |
|          |        |        |        | TOAR   |         |         |
|          |        |        |        | 432    |         | AMSU-A1 |
|          |        |        |        |        |         | s       |
|          |        |        |        | HIRS   |         | urvival |
|          |        |        |        | FW     |         | heaters |
|          |        |        |        | Heat   |         | on      |
|          |        |        |        | ON     |         | 1       |
|          |        |        |        |        |         | 0/29/03 |
|          |        |        |        | 1      |         |         |
|          |        |        |        | 9Apr04 |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | TCE2   |         |         |
|          |        |        |        | 4L&25L |         |         |
|          |        |        |        | (HIRS  |         |         |
|          |        |        |        | &      |         |         |
|          |        |        |        | AVHRR) |         |         |
|          |        |        |        | failed |         |         |
|          |        |        |        | 5      |         |         |
|          |        |        |        | /13/98 |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | RCE    |         |         |
|          |        |        |        | ther   |         |         |
|          |        |        |        | mostat |         |         |
|          |        |        |        | failed |         |         |
|          |        |        |        | 5      |         |         |
|          |        |        |        | /13/98 |         |         |
|          |        |        |        |        |         |         |
|          |        |        |        | Cold   |         |         |
|          |        |        |        | season |         |         |
|          |        |        |        | ended, |         |         |
|          |        |        |        | trend  |         |         |
|          |        |        |        | re     |         |         |
|          |        |        |        | versed |         |         |
+----------+--------+--------+--------+--------+---------+---------+
|          | *      | *      | *      | *      | **N16** | **N17** |
|          | *N11** | *N12** | *N14** | *N15** |         |         |
+----------+--------+--------+--------+--------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-11 No change since previous report. NOAA management has approved
decommissioning N11 but no date has yet been

Determined for this operation. Andy Miller and Jon Woodward supported
the studies and provided inputs into the briefing provided to NOAA
management by POES management.

NOAA-12. Spacecraft attitude control performance has been nominal since
the control mode was commanded back to Nominal

with Yaw updates enabled. EMOSS has been monitoring DTR1A for any signs
of degradation but none has been reported over the past reporting
period. (DTR1B was permanently taken out of service on 7 Apr because of
unreliability.) Angelique Riley is EMOSS POC.

EMOSS engineers continue to investigate a discrepancy in N12's orbital
GEODAT calculations of eclipse season onset relative to those generated
on the ground (and in actual fact). A TOAR has been generated (but not
yet submitted) in order to capture the cause of this problem. N12
eclipse season is expected to start on or about 21 Apr and last through
21 Aug 04 with a maximum darkness/orbit of 22% occurring in mid-June and
lasting through early July. No reconfigurations are currently planned in
response to this event. Andy Miller is EMOSS POC.

NOAA-14: Due to reduced contact support, N14 had a number of data gaps
this week. On 14 Apr, the N14 AVHRR scan motor

was toggled off then on as an experiment that was requested in the hope
of finding a resolution to the chronic N16 AVHRR problem. There is
widespread belief that the motor spun down, stalled and has remained
that way since. Synch deltas show a uniform stair step pattern after
every MIRP rephase of 25 counts up per each update. They are always
pegged within 1.5 minutes following rephase. The scan motor current was
pegged at 306 mAMps following the turn back on, then retreated to a
tight range between 298 and 292 mAmps where it has remained since.
Imagery is apparently not being taken. ITT will be proposing a number of
future tests that can be conducted to either get the scan motor back on
line or provide insight into scan motor performance that can be applied
to other AVHRR's. The N14 AVHRR was red in status before the test, and
remains so. (Illustrations 1-3). Conversely HIRS was nominal throughout
the reporting period.

The new permanent eclipse season for N14 continues to deepen for N14
with no apparent areas of concern at the present time (illustration 4).
No changes are currently planned but close monitoring is ongoing by
EMOSS POC Andy Miller to determine if an increase in power generation
(solar array offset decrease) may be necessary in the coming weeks.

NOAA-15: Reduced Gyro testing commenced as scheduled on 19 Apr at 12:00
with a large team of engineers from the factory,

NASA and NOAA involved in monitoring N15's ADACS performance as pitch
and roll were "knocked out" (on Monday and Tuesday). Tomorrow,
Wednesday, 21 Apr, Yaw will be "knocked out" for a 24 hours period with
engineers sitting on console throughout the day and night. EMOSS
engineers Jim Sheperd, Jon Woodward and Jim Walters are performing in
the role as test conductor for these tests, and Carl Glinack is also
supporting for EMOSS. As of this writing, everything had gone according
to plan and no significant problems have been encountered with the
tests.

The N15 AVHRR scan motor remained stable throughout the reporting period
albeit at the higher level that it jumped to on 6 Apr. Imagery and synch
delta were also nominal for the entire week (illustration 5-6). EMOSS is
closely monitoring this payload because it already has a history of
occasional anomalous behavior. Will Kent is EMOSS POC.

The N15 AMSU-B was nominal throughout the reporting period. However on
19 Apr at 02:00Z, the N15 HIRS

experienced a major filter motor current surge accompanied by erratic
period monitor and filter wheel synch similar to that exhibited by N15
in December of 2003. Reports were also received by EMOSS that imagery
was adversely impacted. In accordance with NOAA approved AET COPS put in
place last February by the EMOSS team, in response to this anomaly the
HIRS Filter wheel heater was turned on at 12:50Z on 19 Apr. This is an
operation that while believed to be useful at possibly reducing the
filter motor current is also well known to degrade HIRS imagery further.
The heater will remain on until the current returns to more nominal
levels or until EMOSS is directed by NOAA otherwise. As of 13:00Z today,
the filter motor current had receded somewhat but was still anomalously
high (illustrations 7-8). Will Kent is EMOSS POC for this situation.

NOAA-16: The N16 AVHRR scan motor current remained inconsistent
throughout the first half of the reporting period. However,

in accordance with an AVHRR Anomaly Response Team recommendation, on 14
Apr at 14:00Z, TCE24 Heater and Louver were powered off in order to warm
up the instrument and loosen up the lubricant. This TCE is expected to
remain off for at least several weeks although if the Scan motor temp
reaches 28.5 degrees C (not considered likely), the TCE will be
commanded back on again. Ultimately, it appears that this operation has
been somewhat, though not completely successful at improving the AVHRR
scan motor performance. In general, the scan motor current has remained
relatively stable, as has synch delta and imagery bar code free since
the TCE turnoff. However, on 20 Apr following the 04:30Z MIRP rephase,
the scan motor current had a quick, but short lived surge to 300+ mAmps
which had the effect of pegging synch delta and causing bar codes in the
imagery. Within 15 minutes, the current had returned to more stable
values. However, neither synch delta nor imagery recovered. Therefore,
in order to try and minimize the number of bar code images that would
result between the scan motor recovery at 06:00 and the next MIRP
rephase 22 hours later, EMOSS engineer Jeff Devine recommended and NOAA
management approved a manual

(N16 cont)

MIRP rephase at the earliest opportunity. This opportunity came at
14:31:45Z when the MIRP rephase was enabled for 15 seconds. The
objective of this operation was achieved when the next HRPT image
available (at 16:00Z) was verified to be bar code free as was the
following image at 17:30Z (illustrations 9-12 ).

One of the primary concerns against turning off TCE24 is the
understanding that it could impact the N16 HIRS filter motor current and
temperature (as it did the last time it was turned off in Sept 2003).
The concern is that the HIRS on N16 is exhibiting instability itself on
a more frequent basis that may be a harbinger of more significant
problems in the future. In the past several days the HIRS filter motor
current and temperature have become somewhat more erratic and

elevated and there have been reports of imagery degradation on several
channels. Ironically, turning off the TCE had the opposite effect on the
N16 HIRS this time compared to September 2003. Within a day, the filter
motor current had receded to nominal levels as had the filter motor temp
while the period monitor also "settled down". Reports are still being
received by EMOSS from products personnel that some N16 HIRS channels
remain degraded. However, from an engineering only standpoint the
instrument looks as good as it has for several months (illustrations
13-14)

N16 attitude control was nominal during the past reporting period with
as were bus voltage and shunt performance. Yaw updates remain within
standard (illustration 15).

NOAA-17: Since switching the gyro channel assignment on N17 from BBB to
AAB, the yaw values on N17 have remained

nominal (illustration 16).

Power and thermal components of N17 remained nominal and steady last
week while testing over Svalbard using STX-4 continued on each Svalbard
visibility during the week.

NOAA-N No changes since previous report.

MISC: EMOSS team is performing display page comparisons between CWS and
3100 in order to reconcile all discrepancies.

Due date for completion is 1 May.

A solar eclipse occurred on 19 Apr for all POES spacecraft between 12:00
and 15:30Z. Analysis of the effects of this eclipse were put through the
EMOSS model and it was determined by the team that no reconfigurations
of any spacecraft would be necessary to safely get through this event.
Subsequent comparison of the actual events relative to the EMOSS
prediction showed a very close correlation. Kim Kolb was EMOSS POC for
this model.

![](media/image1.wmf){width="7.875in" height="5.872222222222222in"}

Illustration 1: N14 AVHRR Scan Motor Health

![](media/image2.wmf){width="6.5in" height="4.617361111111111in"}

Illustration 2: N14 AVHRR Synch Delta Before, During and After Scan
Motor Toggle

![](media/image4.png){width="5.991666666666666in"
height="5.440277777777778in"}

Illustration 3: N14 AVHRR Imagery following Scan Motor Toggle

![](media/image5.wmf){width="8.25in" height="6.251388888888889in"}

Illustration 4: N14 Selected EPS Eclipse effects analysis

![](media/image6.wmf){width="8.125in" height="6.058333333333334in"}

![](media/image7.png){width="7.5in" height="1.0in"}N15 most recent GAC
20 Apr 10:15Z

Illustration 5: N15 AVHRR Health and Imagery Analysis

![](media/image8.wmf){width="7.875in" height="6.18125in"}

Illustration 6: N15 Synch Delta Analysis

![](media/image9.wmf){width="8.0in" height="5.964583333333334in"}

Illustration 7: N15 HIRS Filter Wheel Health Analysis

![](media/image10.wmf){width="7.375in" height="4.468055555555556in"}

![](media/image11.png){width="2.798611111111111in"
height="3.942361111111111in"}Most Reent N15 HIRS Image. 20 Apr 13:15Z

**Illustration 8: N15 HIRS Performance Analysis.**

Reports of imagery degradation plus filter wheel heater turnon. However,
above image not especially degraded.

![](media/image12.wmf){width="8.125in" height="6.058333333333334in"}

Illustration 9: N16 AVHRR Health Analysis

Note relative improvement in scan motor current

![](media/image13.png){width="1.625in" height="4.776388888888889in"}HRPT
at 00:40Z HRPT at 06:15Z HRPT at 11:15Z HRPT16:15Z

Pre-rephase Post Rephase Pre manual Post manual

(scheduled) Post current surge rephase rephase.

> Image at
>
> 1730Z also
>
> nominal

![](media/image17.png){width="7.625in" height="0.7291666666666666in"}N16
GAC 20 Apr 04 at 07:30Z (after automatic rephase)

![](media/image18.png){width="7.625in" height="0.8534722222222222in"}N16
GAC 20 Apr at 16:10Z (first GAC following manual rephase nominal)

Illustration 10: N16 AVHRR Imagery Analysis Tuesday, 20 Apr 2004

![](media/image19.wmf){width="8.25in" height="6.251388888888889in"}

Illustration 11: N16 AVHRR Thermal Analysis

![](media/image20.wmf){width="8.125in" height="6.058333333333334in"}

Illustration 12: N16 AVHRR Synch Delta Analysis

![](media/image21.wmf){width="8.125in"
height="6.058333333333334in"}**Illustration 13 N16 HIRS Filter Motor
Analysis**

Note the relative improvement following TCE24 turnoff although reports
of image degradation persist.

![](media/image22.wmf){width="8.125in" height="6.058333333333334in"}

**Illustration 14: N16 HIRS Filter Wheel Performance**

(Note improvement of period monitor since TCE turned off)

![](media/image23.wmf){width="7.75in" height="6.311805555555556in"}

**Illustration 15: N16 Yaw Update Analysis**

**(looking nominal)**

![](media/image24.wmf){width="8.0in" height="6.496527777777778in"}

**Illustration 16: N17 Yaw Performance.**

(Much improved since gyro swap)

**Weekly N17 CPU Error Scrubs**

> ![](media/image25.wmf){width="7.25in" height="1.9402777777777778in"}On
> 22 Dec between 18:24 and 19:01Z CPU errors were reported by telemetry
> at a substantially higher number (numbered in the hundreds) than
> appears above. For purposes of brevity only the first and last errors
> during this possible anomalous situation are being reported. A TOAR
> was submitted in response to this event. On 8 Feb 04, a similar
> occurrence happened on CPU-2. No effect on the spacecraft was apparent
> and this large number will not be included in future reporting on CPU
> errors.

![](media/image26.wmf){width="7.0in" height="5.451388888888889in"}

**Red/Circle = CPU#1**

**Black/X = CPU#2**

![](media/image27.wmf){width="7.625in" height="4.6in"}

**NOAA-17 Scrubber Hits from 12 Apr 2004 through 18 Apr 2004:**

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING April16, 2004

  ----------- --------- ---------- ---------- ---------- ---------- ----------
  DAY/DATE    NOAA-11   NOAA-12    NOAA-14    NOAA-15    NOAA-16    NOAA-17

  FRI. 04/09  -1711     -040 msec  +053 msec  0 msec     -002 msec  +026 msec
              msec                                                  

  SAT. 04/10  -1840     -042 msec  +054 msec  -2 msec    -005 msec  +025 msec
              msec                                                  

  SUN. 04/11  -1170     -043 msec  +055 msec  -2 msec    -006 msec  +026 msec
              msec                                                  

  MON. 04/12  -1400     -040 msec  +052 msec  -3 msec    -002 msec  +025 msec
              msec                                                  

  TUE. 04/13  -1430     -046 msec  +054 msec  -4 msec    -002 msec  +025 msec
              msec                                                  

  WED. 04/14  -1360     -041 msec  +062 msec  -5 msec    -002 msec  +025 msec
              msec                                                  

  THU. 04/15  -1190     -041 msec  +063 msec  -4 msec    -002 msec  +024 msec
              msec                                                  
  ----------- --------- ---------- ---------- ---------- ---------- ----------

EMOSS POC for this chart is JIM SHEPHERD

NOAA-11 As of 09/03/02 the Control Side TIP clock is corrected daily by
+70 msec to compensate for drift.

As of 11/03/03 Non control side clock is no longer supported

NOAA-12 +500mSec jump on 2 Apr

Daily ETCUP bias of +6.5 mSec started on 12/10/03. Offset fell 500mSecs
on 17 Jan

EXPECTING +500 mSec jump on or about 1 Apr 04

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

Subtracted 50 msec from spacecraft command on 23 Dec 03.

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 mSECS on 23 Feb 04.

![](media/image28.wmf){width="6.875in" height="3.8979166666666667in"}

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

April 09, 2004 through April 15, 2004

JDAY 100-106

  ----------- -------- -------- --------- ---------- ---------- --------- -------------
              *Date*   *JDAY*   NOAA15    \*NOAA14   \*NOAA11   NOAA16    NOAA17

  Friday      04/09    100      100.0                           100.0     100.0

                                                                          

  Saturday    04/10    101      100.0                           100.0     100.0

                                                                          

  Sunday      04/11    102      100.0                           100.0     100.0

                                                                          

  Monday      04/12    103      **93.9                          100.0     100.0
                                (a)**                                     

                                                                          

  Tuesday     04/13    104      100.0                           100.0     **93.7(b)**

                                                                          

  Wednesday   04/14    105      100.0                           100.0     100.0

                                                                          

  Thursday    04/15    106      100.0                           100.0     **99.9 (c)**

                                                                          

                                                                          
  ----------- -------- -------- --------- ---------- ---------- --------- -------------

**\*NOAA-11 and NOAA-14 excluded because they are only recording STIP
data. This data is not recovered.**

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

(a) Rev 30743/W: G4B noisy; 97.6% recovered.

(b) Rev 09366/W: G3A noisy; 97.9% recovered.

(c) Rev 09395/F: G4A noisy; 98.6% recovered 3DL.

(d) 

**[EMOSS POC For This Chart: Angelique Riley]{.underline}**

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

NOAA-11 DTR 1B -Inoperative.

> DTR 2A/B -Frequently noisy

DTR 4B -Frequently noisy

DTR 5A/B -Inoperative

NOAA-12 DTR 5A -Inoperative.

DTR 2B -Occasionally noisy and short

DTR-1B- Taken out of service, unreliable

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