**POLAR Spacecraft Status As of: Tues 5 Apr 05 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** | 1      | 2      | 1      | 1430=AN | 2224=AN | PM      |
|          | 648=AN | 019=AN | 817=AN |         |         |         |
|          |        |        |        | GAC&LAC | GAC&LAC | Plan    |
|          | STIP   | STIP   | GAC    | data    | data    | A       |
|          | data   | data   | data   |         |         | N=14:00 |
|          | only   | only   | only   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **LA     | 05     | 12     | 05     | 0       | 6/24/02 | #       |
| UNCHED** | /14/91 | /30/94 | /13/98 | 9/21/00 |         | ######  |
|          |        |        |        |         |         | 11May05 |
+----------+--------+--------+--------+---------+---------+---------+
| **CNTL   | OBP2   | OBP2   | OBP2   | OBP2    | OBP2    | Dress   |
| OBP**    |        |        |        |         |         | R       |
|          |        | OBP1   |        |         |         | ehearse |
|          |        | inope  |        |         |         | #1      |
|          |        | rative |        |         |         |         |
|          |        |        |        |         |         | Co      |
|          |        |        |        |         |         | mpleted |
|          |        |        |        |         |         | 13Jan   |
+----------+--------+--------+--------+---------+---------+---------+
| **BUS**  | B-BUS  | B-BUS  | B-BUS  | B-BUS   | B-BUS   | Dress   |
|          |        |        |        |         |         | R       |
|          | XSU-1  | XSU2   | XSU-1  | XSU-1   | XSU-1   | ehearse |
|          |        | (XSU1  |        |         |         | #2      |
|          |        | inop)  |        |         |         |         |
|          |        |        |        |         |         | 14Apr05 |
+----------+--------+--------+--------+---------+---------+---------+
| **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 |        |         |         |         |
|          |        | when   | N2 Low |         |         |         |
|          |        | mo     | PSI    |         |         |         |
|          |        | de=YGC | i      |         |         |         |
|          |        |        | nvalid |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **RXO**  | PRI    | PRI    | PRI    | PRI     | PRI     |         |
|          |        |        |        |         |         |         |
|          | BU     | BU     | daily  | Daily   | Daily   |         |
|          | random | random | bias   | Bias    | Bias    |         |
|          | e      | e      | -8 mS  | --5.5   | --3 mS  |         |
|          | nables | nables |        | mS      |         |         |
|          |        | daily  | +100   |         |         |         |
|          | daily  | bia    | mS     | -100 mS |         |         |
|          | bi     | s--7.0 | 31Au04 | 31Au04  |         |         |
|          | 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 | Analog  | Analog  |         |
|          |        |        | 4/     | telem   | telem   |         |
|          |        |        | 23/03) | d       | d       |         |
|          |        |        |        | rifting | rifting |         |
|          |        |        | 3      |         |         |         |
|          |        |        | Ch     | **[Plan |         |         |
|          |        |        | annels | swap    |         |         |
|          |        |        | inop   | 19Apr]  |         |         |
|          |        |        |        | {.under |         |         |
|          |        |        |        | line}** |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DTRs** | 3A, 4, | 1, 2B, | 1, 2,  | 1       | 1,2,3,4 | All     |
|          | 5B     | 5      | 3, 4   | ,2,3,4A |         | solid   |
|          |        | Safe   | Saf    |         | Safes   | state   |
|          | Saf    | state- | estate | Sa      | tate=1B | digital |
|          | estate | 1B     | 1B EOT | festate |         | re      |
|          | 5B     |        |        | 3A      | D       | corders |
|          |        |        |        |         | TR2-SSR |         |
|          |        |        |        | 4B STIP |         |         |
|          |        |        |        | only    |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **VTX**  | #1 ON  | OFF    | #1 ON  | INOP    | #2 ON   | #       |
|          |        |        |        |         |         | 1=137.1 |
| (APT     | 137.50 | Since  | 137.50 | OFF     | 137.62  | MHZ     |
| data)    | MHZ    | 8      | MHZ    | since   | MHZ     | #2=1    |
|          |        | /14/02 |        | 1       |         | 37.9125 |
|          | Co     |        | Co     | 1/15/00 |         | MHZ     |
|          | nflict |        | nflict |         |         |         |
|          | st     |        | with   |         |         |         |
|          | arting |        | N12    |         |         |         |
|          | with   |        | Plan   |         |         |         |
|          | N15.   |        | t      |         |         |         |
|          | 15 to  |        | urnoff |         |         |         |
|          | be     |        |        |         |         |         |
|          | turned |        | 15 Apr |         |         |         |
|          | off 15 |        | at     |         |         |         |
|          | Apr    |        | 20:00z |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **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 --    | STX-3   |
|          | HRPT;  | HRPT   | HRPT   | HRPT;   | HRPT    | fr      |
| #        |        |        |        |         |         | equency |
| 1=1698.0 | 2,3 -  | 2, 1   | 4-Pl   | 2--     | TOAR424 | drift   |
| mhz      | Pl     | --     | ayback | Pl      | low     | problem |
|          | ayback | Pl     |        | ayback; | power   | caused  |
| #        |        | ayback | 1,     |         |         | launch  |
| 2=1702.5 |        |        | 2,3-De | 4 --    | 2 & 4   | slip.   |
| mhz      |        |        | graded | P       | P       |         |
|          |        |        |        | layback | layback | R       |
| #        |        |        |        |         |         | eplaced |
| 3=1707.0 |        |        |        | 3 low   | 1-      | at VAFB |
| mhz      |        |        |        | power   | Standby | und     |
|          |        |        |        | unused  |         | ergoing |
| #        |        |        |        |         | STX-1   | testing |
| 4=2247.5 |        |        |        |         | output  |         |
| mhz      |        |        |        |         | power   |         |
|          |        |        |        |         | drop    |         |
|          |        |        |        |         | TOAR    |         |
|          |        |        |        |         | 443.    |         |
+----------+--------+--------+--------+---------+---------+---------+
| #        | [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} |         |
| and CANT |        |        |        |         |         |         |
| angle,   | since  | Since  | Since  | Since   | Since   |         |
| charge & | 8      | 8      | 1      | 7/16/02 | 1/29/04 |         |
| V/T      | /31/04 | /21/03 | /25/01 |         |         |         |
| rates,   |        |        |        | Eclipse | Eclipse |         |
| eclipse  | Full   | E      | Full   | all     | all     |         |
| states   | Sun    | clipse | Sun    | year    | year    |         |
| and sun  |        | all    |        |         |         |         |
| angle)   | B      | year   | Sun    | Sun     | Sun     |         |
|          | attery |        | Angle  | Angle   | Angle   |         |
| Sun-Moon | UVtrip | Sun    | 12,    | 54      | at 68   |         |
|          | 7      | angle  | up-    |         |         |         |
| Eclipse  | /25/04 | 38     | trend  | Steady  | Uptrend |         |
| p        |        |        | to 32  | trend   | to 72   |         |
| redicted | Sun    | up     | in     |         | at      |         |
|          | Angle  | trend  | June   | Batts   |         |         |
| For 8    | 23     | to 52  |        | 1-3=    | the end |         |
| Apr 05.  |        | in     | Batts  | LRC     | of May  |         |
|          | U      | June   | 1-3=   |         |         |         |
| 18:0     | ptrend |        | LRC    | V/T=4/8 | Batts   |         |
| 0-23:00Z | to 37  | Batts  |        |         | 1-3=    |         |
|          | in     | 1-3=   | V      | SA      | LRC     |         |
| Minor    | mi     | LRC    | /T=7/9 | CANT=22 |         |         |
| effects  | d-June |        |        | degs    | V/T=    |         |
| on all   |        | Batts  | SA     |         | 4/8     |         |
| spa      | Batts  | 1&3V/  | C      | SADPOS  |         |         |
| cecraft. | 1      | T=7/11 | ANT=37 | timer   | SA      |         |
|          | &2=LRC |        | degs   | in      | CANT=37 |         |
|          |        | Batt2  |        | creased | degs    |         |
|          | V/T=4  | V      |        | 5 Apr   |         |         |
|          |        | T=8/11 |        |         | SADPOS  |         |
|          | Shunt  |        |        |         | timer   |         |
|          | de     | SS     |        |         | in      |         |
|          | graded | t      |        |         | creased |         |
|          |        | rigger |        |         | 5 Apr   |         |
|          | SA     | =18.98 |        |         |         |         |
|          | C      |        |        |         |         |         |
|          | ANT=37 | Shunt  |        |         |         |         |
|          | degs   | De     |        |         |         |         |
|          |        | graded |        |         |         |         |
|          |        |        |        |         |         |         |
|          |        | SA     |        |         |         |         |
|          |        | C      |        |         |         |         |
|          |        | ANT=22 |        |         |         |         |
|          |        | degs   |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| *        | N      | INOP   | N      | Oper    | ###     | New     |
| *AVHRR** | ominal |        | ominal | ational | Nominal | br      |
|          |        | Scan   |        |         |         | ushless |
|          |        | motor  | Rare   | TCE24   | 3A-B    | scan    |
|          |        | s      | major  | OFF     | switch  | motors  |
|          |        | talled | scan   | 4/14/04 | enabled |         |
|          |        |        | motor  |         |         |         |
|          |        | 14 Apr | s      | Occ     |         |         |
|          |        | 04     | urges. | asional |         |         |
|          |        |        | Last   | Image   |         |         |
|          |        |        |        | Wave    |         |         |
|          |        |        | In     | p       |         |         |
|          |        |        | cident | atterns |         |         |
|          |        |        | 11     |         |         |         |
|          |        |        | /18/04 | Chan 3B |         |         |
|          |        |        |        | only.   |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | Opera  | Oper    | O       |         |
| MSU-A1** |        |        | tional | ational | FF/INOP |         |
|          |        |        |        |         |         |         |
|          |        |        | Ch14   | Primary | Since   |         |
|          |        |        | inope  | PLLO    | 1       |         |
|          |        |        | rative | chans   | 0/30/03 |         |
|          |        |        |        | 9-14    |         |         |
|          |        |        | Ch11   | bias    | S       |         |
|          |        |        | inope  | shift.  | urvival |         |
|          |        |        | rative |         | heat    |         |
|          |        |        |        | Backup  | on.     |         |
|          |        |        | Record | PLLO    |         |         |
|          |        |        | low    | inop    |         |         |
|          |        |        | com    |         |         |         |
|          |        |        | ponent | Channel |         |         |
|          |        |        | temps  | 9-14    |         |         |
|          |        |        | re     | noise   |         |         |
|          |        |        | versed | i       |         |         |
|          |        |        | trend  | mproved |         |         |
|          |        |        |        | since   |         |         |
|          |        |        |        | 1/19    |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **A      |        |        | N      | Nominal | Nominal |         |
| MSU-A2** |        |        | ominal |         |         |         |
|          |        |        |        | Space   |         |         |
|          |        |        |        | Pos     |         |         |
|          |        |        |        | ition-2 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | Opera  | Oper    | Nominal | R       |
| AMSU-B** |        |        | tional | ational |         | eplaced |
|          |        |        |        |         |         | by MHS  |
|          |        |        | Bias   | Space   |         |         |
|          |        |        | in All | Pos     |         |         |
|          |        |        | Chans. | ition-3 |         |         |
|          |        |        |        |         |         |         |
|          |        |        | Motor  | IPD     |         |         |
|          |        |        | surges | reports |         |         |
|          |        |        | most   | channel |         |         |
|          |        |        | recent | 8       |         |         |
|          |        |        | 11     | degr    |         |         |
|          |        |        | /14/04 | adation |         |         |
|          |        |        |        |         |         |         |
|          |        |        | IPD    |         |         |         |
|          |        |        | R      |         |         |         |
|          |        |        | eports |         |         |         |
|          |        |        | of     |         |         |         |
|          |        |        | de     |         |         |         |
|          |        |        | graded |         |         |         |
|          |        |        | data   |         |         |         |
|          |        |        | on     |         |         |         |
|          |        |        | Chan-3 |         |         |         |
|          |        |        | since  |         |         |         |
|          |        |        | 4/30   |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ### HIRS | ON /   | N      | Opera  | D       | NOMINAL | ####    |
|          | INOP   | OMINAL | tional | EGRADED |         | #### HI |
|          |        |        |        |         | 1 Pixel | RS-4 re |
|          | Turned | Opera  | FW     | L       | cross   | placing |
|          | on     | tional | m      | ongwave | track   |  HIRS-3 |
|          | 8      |        | ode=Hi | channel | misal   |         |
|          | /30/04 | Occa   | Powr   | imagery | ignment |         |
|          |        | sional |        | i       | .       |         |
|          | For    | loss   | FW     | mproved |         |         |
|          | power  | of     | Heater | radi    |         |         |
|          | b      | Fwheel | OFF    | ometric |         |         |
|          | alance | synch  |        | noise   |         |         |
|          |        |        | Fr     | level   |         |         |
|          | Filter |        | equent | is      |         |         |
|          | Wheel  |        | Filter | still   |         |         |
|          | turned |        | Motor  | high    |         |         |
|          | OFF    |        | c      |         |         |         |
|          | 10/    |        | urrent | TOAR    |         |         |
|          | 17/02. |        | "mini" | 441     |         |         |
|          |        |        | surges | su      |         |         |
|          |        |        |        | bmitted |         |         |
|          |        |        | Occa   | 11      |         |         |
|          |        |        | sional | Jan05   |         |         |
|          |        |        | major  |         |         |         |
|          |        |        | FM     | Cons    |         |         |
|          |        |        | c      | idering |         |         |
|          |        |        | urrent | high    |         |         |
|          |        |        | s      | power   |         |         |
|          |        |        | urges, | mode    |         |         |
|          |        |        | most   |         |         |         |
|          |        |        | recent | Occ     |         |         |
|          |        |        | 1      | asional |         |         |
|          |        |        | 2/9/04 | major   |         |         |
|          |        |        |        | FM      |         |         |
|          |        |        |        | surges, |         |         |
|          |        |        |        | most    |         |         |
|          |        |        |        | recent  |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | 12/9/04 |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | HIRS    |         |         |
|          |        |        |        | filter  |         |         |
|          |        |        |        | heater  |         |         |
|          |        |        |        | turned  |         |         |
|          |        |        |        | OFF     |         |         |
|          |        |        |        | 1/18/05 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| ###      |        |        |        |         |         | R       |
|  MHS/MIU |        |        |        |         |         | eplaces |
|          |        |        |        |         |         | AMSUB   |
+----------+--------+--------+--------+---------+---------+---------+
| **MSU**  | ON /   | Opera  |        |         |         |         |
|          | INOP   | tional |        |         |         |         |
|          |        |        |        |         |         |         |
|          | On For | Scan   |        |         |         |         |
|          | power  | motor  |        |         |         |         |
|          | b      | and    |        |         |         |         |
|          | alance | a      |        |         |         |         |
|          | Scan   | ntenna |        |         |         |         |
|          | Motor  | pr     |        |         |         |         |
|          | OFF    | oblems |        |         |         |         |
|          | since  |        |        |         |         |         |
|          | 3      |        |        |         |         |         |
|          | /12/03 |        |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SSU**  |        | N      |        |         |         |         |
|          |        | ominal |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **DCS**  | N      | N      | N      | Nominal | Nominal |         |
|          | ominal | ominal | ominal |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARR** |        | N      | Opera  | Oper    | Nominal |         |
|          |        | ominal | tional | ational |         |         |
|          |        |        |        |         | A-side  |         |
|          |        |        | A      | A-side, |         |         |
|          |        |        | -Side, | AGC     | All AGC |         |
|          |        |        | AGC    | Mode    | Mode    |         |
|          |        |        | Mode   |         |         |         |
|          |        |        |        | (B-side |         |         |
|          |        |        | Interm | in FG   |         |         |
|          |        |        | ittent | mode)   |         |         |
|          |        |        | fa     |         |         |         |
|          |        |        | ilures | 243 MHz |         |         |
|          |        |        | for    | = INOP. |         |         |
|          |        |        | 243MHz |         |         |         |
|          |        |        | A&B    | R       |         |         |
|          |        |        |        | econfig |         |         |
|          |        |        |        | uration |         |         |
|          |        |        |        | planned |         |         |
|          |        |        |        | for 6   |         |         |
|          |        |        |        | Apr     |         |         |
|          |        |        |        |         |         |         |
|          |        |        |        | Switch  |         |         |
|          |        |        |        | to BA   |         |         |
|          |        |        |        | mode    |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SARP** |        | OFF    | N      | Nominal | Nominal |         |
|          |        |        | ominal |         |         |         |
|          |        | Power  |        | RCVR    |         |         |
|          |        | F      | RCVR   | B/W = 2 |         |         |
|          |        | ailure | B/W =  |         |         |         |
|          |        |        | 2      |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SEM**  | ON/N   | Opera  | N      | Nominal | Nominal |         |
|          | ominal | tional | ominal |         |         |         |
|          |        |        |        | E-CDEM  | E-CDEM  |         |
|          | Turned | El     | E      | -HVPS=5 | -HVPS=2 |         |
|          | on     | ec-CH- | -CDEM- |         |         |         |
|          | 8      | HVPS=0 | HVPS=2 | P-CDEM  | P-CDEM  |         |
|          | /30/04 |        |        | -HVPS=4 | -HVPS=3 |         |
|          |        | Pr     | P      |         |         |         |
|          | El     | ot-CH- | -CDEM- |         |         |         |
|          | ec-CH- | HVPS=0 | HVPS=0 |         |         |         |
|          | HVPS=4 |        |        |         |         |         |
|          |        | 1 of 4 |        |         |         |         |
|          | Pr     | Tele   |        |         |         |         |
|          | ot-CH- | scopes |        |         |         |         |
|          | HVPS=0 | inope  |        |         |         |         |
|          |        | rative |        |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **SBUV** |        | De     |        | Oper    | Nominal |         |
|          |        | graded |        | ational |         |         |
|          |        |        |        |         | Anode   |         |
|          |        | Grate  |        | D       | Mode    |         |
|          |        | motor  |        | egraded |         |         |
|          |        | sticks |        | Ozone   |         |         |
|          |        |        |        | data    |         |         |
|          |        | Flex   |        |         |         |         |
|          |        | memory |        | Backup  |         |         |
|          |        | 3      |        | D       |         |         |
|          |        | (giant |        | iffuser |         |         |
|          |        | step)  |        | inop    |         |         |
|          |        | ops    |        |         |         |         |
|          |        | sus    |        | Primary |         |         |
|          |        | pended |        | D       |         |         |
|          |        | 1      |        | iffuser |         |         |
|          |        | 2/2/03 |        | dep     |         |         |
|          |        |        |        | loyment |         |         |
|          |        | R      |        | problem |         |         |
|          |        | educed |        | TOAR    |         |         |
|          |        | oper   |        | 426     |         |         |
|          |        | ations |        |         |         |         |
|          |        |        |        | AMSU    |         |         |
|          |        |        |        | EMI     |         |         |
|          |        |        |        | causing |         |         |
|          |        |        |        | erratic |         |         |
|          |        |        |        | B       |         |         |
|          |        |        |        | ehavior |         |         |
|          |        |        |        | in PMT  |         |         |
|          |        |        |        | cathod, |         |         |
|          |        |        |        | range 3 |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **       |        |        | N/A    | ON      | ON      |         |
| SADPOS** |        |        |        |         |         |         |
|          |        |        |        | Enabled | ENABLED |         |
|          |        |        |        | MFa     |         |         |
|          |        |        |        | ctor50% | Timer   |         |
|          |        |        |        |         | changed |         |
|          |        |        |        | Timer   | to 12   |         |
|          |        |        |        | changed | (from 8 |         |
|          |        |        |        | to 12   | mins 5  |         |
|          |        |        |        | (from 8 | APr     |         |
|          |        |        |        | mins 5  |         |         |
|          |        |        |        | APr     |         |         |
+----------+--------+--------+--------+---------+---------+---------+
| **T      | N      | N      | TCE26  | Nominal | TCE3H   |         |
| HERMAL** | ominal | ominal | & 15H  |         | Batt 2A |         |
|          |        |        |        | TCE24   | heater  |         |
| Heaters, | TCE's  |        | Telem  | OFF     | failed  |         |
| louvers  | back   |        | i      | 4/14    | ON,     |         |
|          | to     |        | nvalid | (AVHRR  | turned  |         |
| TCE's    | n      |        |        | H&L)    | off     |         |
|          | ominal |        | TOAR   |         | 8/26/03 |         |
|          | c      |        | 432    | HIRS    | TOAR    |         |
|          | onfigu |        |        | Filter  | 428     |         |
|          | ration |        | HIRS   | heater  |         |         |
|          | fol    |        | FW     | turned  | CLOSED  |         |
|          | lowing |        | Heat   | OFF     | 9/14/04 |         |
|          | 7      |        | off    | 1/18/05 | no      |         |
|          | /25/04 |        |        |         | cor     |         |
|          | U      |        | TCE2   |         | rective |         |
|          | Vtrip. |        | 4L&25L |         | action  |         |
|          |        |        | (HIRS  |         | po      |         |
|          |        |        | &      |         | ssible. |         |
|          |        |        | AVHRR) |         |         |         |
|          |        |        | failed |         | AMSU-A1 |         |
|          |        |        | 5      |         | s       |         |
|          |        |        | /13/98 |         | urvival |         |
|          |        |        |        |         | heaters |         |
|          |        |        | RCE    |         | on      |         |
|          |        |        | ther   |         | 1       |         |
|          |        |        | mostat |         | 0/29/03 |         |
|          |        |        | failed |         |         |         |
|          |        |        | 5      |         |         |         |
|          |        |        | /13/98 |         |         |         |
+----------+--------+--------+--------+---------+---------+---------+
|          | *      | *      | *      | **N16** | **N17** | ### N   |
|          | *N12** | *N14** | *N15** |         |         | OAA-N18 |
+----------+--------+--------+--------+---------+---------+---------+

**COMMENTS/CHANGES:**

NOAA-12 There were no changes on N12 during the past reporting period.

NOAA-14: Spacecraft is operating nominally and power subsystem remains
stable and well above safe state threshold values as the long slow
increase in percentage darkness time per orbit continues through
mid-June 05.

NOAA-15: The N15 AVHRR was generally stable in scan motor current during
the past week as component temperatures continued there uptrend
(illustration 1). The synch delta was also slightly higher but is not,
at the moment, something that is cause for immediate concern. The AVHRR
imagery on N15 continues to be nominal.

The N15 HIRS returned back to a nominal range in the past 5 days after
recovering from a filter motor current mini-surge with no reports of
imagery degradation being received by EMOSS and no loss of filter wheel
synch (illust 2).

The AMSU's on N15 were all nominal during the post week as their thermal
trends continued upward.

N15 is entering a RF (VTX-1) conflict period with N12 which will result
in the N15 VTX-1 (APT data) being turned off at 20:00Z on 15 Apr through
07:00Z on 16 May 05. Will Chadwick is EMOSS POC for this operation.

NOAA-16 The N16 AVHRR scan motor current was slightly higher last week
continuing a very slow uptrend that has generally

result in the scan motor current spending most of its time in a range
that usually results in wave patterns on the imagery. In addition, the
synch delta is showing sign that it may be getting ready to increase
rapidly in the coming days. On the other hand, AVHRR temperatures remain
very stable and well within nominal values despite TCE 24 remaining off
and despite the somewhat elevated scan motor current levels, EMOSS spot
checking of HRPT imagery did not find any obvious wave patterns
(illustration 3 and 4). As has been the case since Nov 2004, there has
still been no MIRP rephases since Nov 2004 and no bar coded imagery
since last summer.

The N16 HIRS filter motor was generally stable to very slightly higher
last week remaining close to but below its all

time high values (illustration 5). EMOSS continues to detect HIRS
imagery degradation and also receive reports of same, while the HIRS
filter wheel synch and period monitor values remain relatively nominal
and stable. Discussions at the 5 April TOAR opened up the possibility
that ITT would request a switch to high power mode in the hope of
improving HIRS products produced by IPD which continue to be degraded.
No plans for such an operation have yet been discussed beyond the
conceptual stage. Sally House is EMOSS POC for this payload.

EMOSS engineers continue preparing for a TIP swap on N16 currently
planned for 19 April 05. Jon Woodward and Will Chadwick are EMOSS POC's
for this operation.

EMOSS engineer Will Chadwick will be overseeing a reconfiguration of the
SARR on N16 within the next several days. This reconfiguration,
requested by SARSAT personnel will turn the SARR on in Mode BA by
powering up the B side converter and receivers with the A side
transmitter, then setting the attenuators to 5 dB (121.5 and 243
receivers and PDS channel) and 10 dB on the 406 channel.

To prevent any reasonable chance that a sun moon eclipse (predicted to
occur on N16 on 8 Apr at 22:13Z) will be of a depth and duration that
could result in SADPOS taking autonomous control of the solar array when
it is not necessary, (as it did last October) EMOSS engineers changed
the timer that implements this takeover by adding an additional 4
minutes to the previous 8 minute countdown timer. All EMOSS analysis
done with its highly accurate solar eclipse model has shown that no
sun-moon eclipse resulting a solar array patch current of less than 150
mAmps solar array current should ever exceed 12 minutes. Jon Woodward
was EMOSS POC for this change.

NOAA-17: The N17 AVHRR scan motor current was very stable to slightly
higher during the past week while synch delta and

AVHRR component temps were very stable and imagery remained nominal
(illustration 6). EMOSS is continuing to monitor this payload very
closely.

To prevent any reasonable chance that a sun moon eclipse (predicted to
occur on N17 on 8 Apr at 19:34Z) will be of a depth and duration that
could result in SADPOS taking autonomous control of the solar array when
it is not necessary, EMOSS engineers changed the timer that implements
this takeover by adding an additional 4 minutes to the previous 8 minute
countdown timer. All EMOSS analysis done with a highly accurate solar
eclipse model has shown that no sun-moon eclipse resulting a solar array
patch current of less than 150 mAmps solar array current should ever
exceed 12 minutes. Jon Woodward was EMOSS POC for this change.

Since 3 April, 20:20Z, the NOAA-17 Illumination Sensor Error telemetry
mnemonic (BSNRDSCD), used as part of SADPOS autonomous solar array
control implementation, has been miscomparing and flagging the patch
current (PC) illumination sensor as in error (miscomparing with the
other two illumination sensors) on every other orbit (illustration 7).
In response, EMOSS engineers focused their investigation on 3 possible
causes: (1) The sensor was failing,

\(2\) The spacecraft percent time in darkness has increased
necessitating that the eclipse timer be lengthened to incorporate this
increased darkness time as it did once before in Sept 2003, (3) Old
ephemeris running on the spacecraft has caused the calculated darkness
times to drift out of the nominal window. The most up to date analysis

N17 (cont)

has led EMOSS to the conclusion that this third possibility may be the
most probable cause of this situation. N17 missed last weeks ephemeris
load because the old load showed better precision than the one that was
to replace it.

Therefore it was decided to leave the old load running for another week.
With this coincidence coupled with additional analysis, EMOSS engineers
have concluded that this old ephemeris has probably caused the eclipse
timer (fix'd at 36 minutes) to "drift to the right" (illustration 8)
resulting in the eclipse timer (equating to spacecraft darkness) turning
on later than fresh ephemeris would otherwise determine. EMOSS is
recommending that any testing or reconfiguration of N17 toward
alleviating this situation await a new ephemeris load (scheduled for
today; OBP=N and tomorrow; OBP=C) and additional analysis of the impact
of this new ephemeris on the eclipse timer start time vs. solar array
patch current comparison. If this theory holds true, the new ephemeris
should push the eclipse timer back into the nominal window and all
illumination sensor errors should cease within an orbit or two of the
new ephemeris being activated. If this does not clear up the flag,
analysis will focus back on the other two potential causes. Once all
analysis has been completed, an Event Report will be distributed with
highlights to be included in the next Weekly Report. Jon Woodward and
Jeff Devine are EMOSS POC's

NOAA-N: No changes since previous report. EMOSS engineers are now
preparing for the second dress rehearsal scheduled for

14 Apr. The new launch support calendar has once again been made
available to the general public. The new web link to review this
calendar is <http://sgt-mets.com/~ddipaula/poes-cal.doc>

MISC: A sun-moon eclipse has been predicted by the EMOSS eclipse model.
This eclipse will affect all POES spacecraft over

the course of 3 orbits from approximately 17:59 through 23:04Z on 8 Apr
05. After careful analysis (see graphs at end of this report) other than
increasing the SADPOS timers (permanently) to 12 minutes on N16 and 17
EMOSS is recommending that no other reconfigurations be implemented
during this event. Additional analysis will continue to be performed
prior to this event to ensure the latest information has been
considered. Kim Kolb, Jim Sheperd, Carl Gliniak, Jon Woodward and Jeff
Devine are all involved in this analysis.

EMOSS engineer Jon Woodward will be deploying to Wallops CDA between
Sunday, 10 Apr and Tues 12 Apr in a COOP exercise.

![](media/image1.png){width="7.875in" height="6.138888888888889in"}

Illustration 1: N15 AVHRR Health Analysis

(Nominal and appears to have arrested the slight uptrend on scan motor
current.)

[.]{.underline}

![](media/image2.png){width="8.0in" height="5.990972222222222in"}

Illustration 2: N15 HIRS Health Analysis

(Looking quite nominal during the past 5 days)

![](media/image3.png){width="8.125in" height="6.375694444444444in"}

Illustration 3: 6 AVHRR Health Analysis

(Some disquieting trends but still producing nominal imagery)

![](media/image4.png){width="7.875in" height="6.216666666666667in"}

HRPT 5 Apr at 13:00Z Same image maximum zoom

(waves not readily apparent)

Illustration 4: N16 AVHRR Imagery Analysis

(Generally Nominal)

![](media/image5.png){width="8.125in" height="6.084027777777778in"}

Illustration 5: N16 HIRS Health Analysis

(Generally stable although the filter motor current uptrend continues,
albeit slightly. Concept discussions with ITTY and NASA have been
initiated regarding the possibility of commanding the filter wheel to
high power mode. No plans as yet have been formulated.)

![](media/image6.png){width="8.0in" height="6.277777777777778in"}

Illustration 6: N17 AVHRR Health Analysis

(Stable and nominal)

![](media/image7.png){width="7.875in" height="6.153472222222222in"}

Illustration 7: N17 Illumination Sensor Error vs. Eclipse period

(Every other orbit since 3 Apr 20:20Z. Clears up after each eclipse)

![](media/image8.png){width="8.125in" height="6.540972222222222in"}

Illustration 7: N17 Illumination Sensor Error vs. Eclipse period

One full Darkness Cycle

Consider the black line FIX'd at 36 minutes per each predicted eclipse.
N17 hasn't had new ephemeris in 2 weeks. It appears that the "black
line" the predicted darkness period/SADPOS timer window, may have
drifted to the right, i.e. its turning on and off later than it should
as evidenced by the fact that there is no time buffer on the left side
of the graph when the timer starts while a 2+ minute buffer on the right
side exists when the timer turns off (as depicted by the time the patch
current (NSADSCI) peaks at approx 20:54 and the spacecraft "thinks"
daylight (BYRILLUM) has occurred at 20:56:30. Under nominal conditions
there should be about 1 minute of buffer on either side vs. the current
2 minute buffer on the right and none on the left. EMOSS is anticipating
that the new ephemeris load, scheduled for 5 April for non control and 6
April for control side OBP will correct this drift by pushing the timer
start time "back to the left" by approx 1 minute.

# 

# N17 MEMORY SCRUB REPORT

# Last week 

![](media/image9.png){width="7.190972222222222in"
height="1.7506944444444446in"}

# POLAR SPACECRAFT TIP CLOCK ERROR

## WEEK ENDING April 1, 2005

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

  FRI. 03/25   -186 msec   +153 msec   -123 msec   +064 msec   +021 msec

  SAT. 03/26   -187 msec   +154 msec   -122 msec   +065 msec   +020 msec

  SUN. 03/27   -187 msec   +152 msec   -123 msec   +066 msec   +021 msec

  MON. 03/28   -191 msec   +156 msec   -127 msec   +065 msec   +021 msec

  TUE. 03/29   -195 msec   +156 msec   -126 msec   +066 msec   +022 msec

  WED. 03/30   -190 msec   +157 msec   -127 msec   +065 msec   +022 msec

  THU. 03/31   -190 msec   +162 msec   -129 msec   +070 msec   +022 msec
  ------------ ----------- ----------- ----------- ----------- -----------

EMOSS POC for this chart is JIM SHEPHERD

NOAA-12 \*Alternating +/- 500 millisecond clock jumps will occur at
76-day intervals as long as fractional second daily ETCUP is utilized to
manage clock drift. Next +500 mS jump is expected on 1/30/05.

> 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 31 Aug 04

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 31 Aug 04.

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.

POES Engineering Contact List

[Government]{.underline}

Renee Smith-Dearing NOAA POES Constellation Lead 301-817-4117

Dong Han: NOAA, POES Payloads 301-817-4127

Micky Fitzmaurice: NOAA, POES Bus, IJPS 301-817-4016

Nicolaie Todirita (Todi): NOAA Ground Systems 301-817-4229

[EMOSS-2 Contractor]{.underline}

Jeff Devine: EMOSS POES Lead 301-817-4020

Jim Walters: EMOSS, POES Payload Engineer 301-817-4033

Angelique Riley, EMOSS, POES Comm and DHS (outgoing) 301-817-4028

Carl Gliniak, EMOSS POES Power and Thermal 301-817-4207

Jim Sheperd, EMOSS POES Attitude Control 301-817-4030

Jon Woodward EMOSS, POES Flight Software C&CS 301-817-4019

Sally House EMOSS POES Payloads (in training) 301-817-4026

William Chadwick EMOSS, POES Comm and DHS (in training) 301-817-4015

![](media/image10.png){width="7.615972222222222in" height="8.375in"}

POES Eclipse Analysis for 8 April 2005 depicts the east to west movement
of the solar eclipse across the earth surface.  The poles are not
effected by this years biannual solar event leaving all but N15 YAW
updates values completely clear,  reducing the number of times POES
spacecraft experience this event, and allowing all spacecraft to orbit
through the solar event without losing 100% sun (maximum loss 70% by
N15).   

![](media/image11.png){width="8.0in" height="5.928472222222222in"}

N12 Sun-Moon Eclipse Analysis for 8 Apr 05 (grey box indicates the
values at which the BYRILLUM telemetry mnemonic indicates darkness.)

Effects and reconfiguration recommendations for N12 (none)

-Power balance: Eclipse effect negligible, no reconfigurations
recommended

-SADPOS Takeover: Not applicable on N12, no reconfigurations possible

-Autonomous YGC Mode: No yaw updates during any reduced sun period.

> No reconfigurations recommended

![](media/image12.png){width="7.875in" height="5.8in"}

N14 Sun-Moon Eclipse Analysis for 8 Apr 05 (grey box indicates the
values at which the BYRILLUM telemetry mnemonic indicates darkness.
Yellow box indicates the percent illumination value threshold that would
have to be reached [during GEODAT predicted sunlight]{.underline} that
[could]{.underline} cause an autonomous switch to YGC mode during a Yaw
Update)

Effects and reconfiguration recommendations for N14 (none)

-Power balance: Eclipse effect negligible, no reconfigurations
recommended

-SADPOS Takeover: Not applicable on N14, no reconfigurations possible

-Autonomous YGC Mode: A yaw updates does occur at the very end of the
only sun

> blockage period that N14 will experience. However, the illumination
> value never approaches that which could threaten an autonomous switch
> to YGC mode.
>
> No reconfigurations recommended

![](media/image13.png){width="8.125in" height="5.870833333333334in"}

N15 Sun-Moon Eclipse Analysis for 8 Apr 05 (grey box indicates the
values at which the BYRILLUM telemetry mnemonic indicates darkness.

Effects and reconfiguration recommendations for N15 (none)

-Power balance: Eclipse effect negligible on this full sun spacecraft
despite the

> (comparatively) "prolonged" period in BRYILLUM darkness. No
> reconfigurations recommended

-SADPOS Takeover: Not applicable on N15, no reconfigurations possible
although the

> 7.5 minute "dark" period would be close to the 8 minute threshold for
> SADPOS takeover on N16 or N17. No reconfigurations possible

-Autonomous YGC Mode: (see next page)

![](media/image14.png){width="7.875in" height="5.9125in"}

[N15 Yaw Update Analysis (cont, Zoom IN from previous page)]{.underline}

Grey box indicates the values at which the BYRILLUM telemetry mnemonic
indicates darkness. Yellow box indicates the percent illumination value
threshold that would have to be reached [during GEODAT predicted
sunlight]{.underline} that [could]{.underline} cause an autonomous
switch to YGC mode during a Yaw Update)

-Autonomous YGC Mode: (from previous page) A yaw updates does occur
during this

> eclipse event but the predicted degree of sunlight lost (45%, equating
> to 55% illuminated) does not approach the value that would threaten an
> autonomous switch to YGC mode (80% equating to 20% illuminated).
> Therefore, no reconfigurations are recommended.

![](media/image15.png){width="8.125in" height="5.972916666666666in"}

N16 Sun-Moon Eclipse Analysis for 8 Apr 05 (grey box indicates the
values at which the BYRILLUM telemetry mnemonic indicates darkness.

Effects and reconfiguration recommendations for N16 (none)

-Power balance: Eclipse effect negligible; expect full charge before
going back into

> Earth-sun eclipse, no reconfigurations recommended

-SADPOS Takeover: SADPOS is applicable on N16. However, the darkness
threshold

> is never breached during this event, let alone breached for the 8
> minutes that would result in SADPOS takeover. Therefore, no
> reconfigurations are recommended. However to be safe the SADPOS timer
> was permanently changed to 12 minutes as of 5 Apr 05.

-Autonomous YGC Mode: No yaw updates will occur while the sun-

moon eclipse is occurring. No reconfigurations

recommended.

![](media/image16.png){width="8.0in" height="5.489583333333333in"}

N17 Sun-Moon Eclipse Analysis for 8 Apr 05 (grey box indicates the
values at which the BYRILLUM telemetry mnemonic indicates darkness.

Effects and reconfiguration recommendations for N17 (none)

-Power balance: Eclipse effect negligible; expect full charge before
going back into

> Earth-sun eclipse, no reconfigurations recommended.

-SADPOS Takeover: SADPOS is applicable on N17 and while the darkness
threshold

> [is]{.underline} breached during this event, it is for significantly
> less time (5 minutes, rounded high) than the 8 minutes required for
> SADPOS takeover. (This analysis uses the Flight Software specs value
> for the BRYILLUM flag to start the 8 minute timer vs. the less
> conservative P&CH. Therefore, no reconfigurations are recommended.
> However to be safe the SADPOS timer was permanently changed to 12
> minutes as of 5 Apr 05.

-Autonomous YGC Mode: No yaw updates will occur while the sun-

moon eclipse is occurring. No reconfigurations

recommended.