SOHO Nov. 12-22, 1998 Timeline
Nov. 12-22, 1998 Timeline
Draft Timeline of Events
Last Updated: 19 November 1998
Disclaimer: All times are estimates.
Station Keeping Burn is BACK On for the 13th...!
Note: If ESR occurs during Leonids, recovery will wait until November 19th.
THURSDAY, November 12th (DOY 316)
Instrument safing activities prior to Maneuver
15:35 - 16:30 SVM Reserved, Beginning of Pass
16:30 - 18:30 NRT Available
* LASCO/EIT Preparations
- FOT: Ignore sector hang warnings for 30 minutes.
- Close C2 and C3 doors, using normal method
(not super closed) ( ~ 30 minutes)
- Load EIT high cadence plan to run until Sunday
(45 min)
* CDS doors close, then to SNOOZE mode
CDS Power will remain ON
* UVCS requires 1.5 hours of NRT commanding
to power down detectors and mechanisms,
close the door 90% of the way
18:30 - 19:00 SVM Reserved
* Enable substitution heaters for CDS
substitution heater # 62 @ 90% duty cycle
substitution heater # 63 @ 60% duty cycle
CDS to monitor and adjust duty cycles via OCD
as necessary until re-commisioning #3 is started.
(note: on November 14, circuit #62 was
reduced to 80% via OCD)
* Turn UVCS off using TSTOL U_FL_PWROFF
Power on the UVCS substitution heaters:
Circuit #84 (TSU) to 70%.
Circuit #85 (REU) to 100%.
19:00 - 23:30 NRT Available
* @ ~ 19:00 UT, Close SUMER door
* @ ~ 19:30 UT, Switch Submode #5 --> #6 via RPR
* @ ~ 20:00 UT, MDI Jitter test
3 hours VC2 and NRT
23:30 - 00:00 SVM Reserved, End of Pass
00:00 LOS on DSS-16
FRIDAY, November 13th (DOY 317)
Station Keeping and Momentum Management
02:40 - 08:20 Short Contact on DSS-46
* Uplink Delayed Command Files for CELIAS
STOF safing: CEL981112303.DEL
CTOF safing: CEL981113100.DEL
09:00 - 10:55 Short Contact on DSS-66
15:35 AOS on DSS-16
15:35 - 16:50 SVM Reserved
* Start of Pass Activities
* Gyro Cals
* SWAN safing:
ESR flag disable to SWAN and n_fl_llockin
16:50 - 18:30 NRT Available
* MTOF safing via NRT
18:30 - 22:30 SVM Reserved
* Transition to RMW
* Momentum Management
- @ 19:40 UT, Hot Backup Begins
- FOT to open MDI ISS loop just prior to CSP transition
by executing TSTOL m_fl_issopen
- Transition RMW to CSP
- @ ~ 19:45 - 20:15 UT, Thruster Firing
- Transition CSP to RMW Mode
* Station Keeping
- Transition RMW to CSP
- @ 21:00 - 21:20 UT, Thruster Firing
- Transition CSP to RMW Mode
- FOT to close MDI ISS loop just after RMW transition
by executing TSTOL m_fl_issclos
* Transition to Normal Mode
22:30 - 07:45 NRT Available
07:45 - 08:15 SVM Reserved, End of Pass
08:20 LOS on DSS-46
08:55 AOS on DSS-66
08:55 - 09:25 SVM Reserved, Start of Pass
09:25 - 10:25 NRT Available
10:25 - 10:55 SVM Reserved, End of Pass
10:55 LOS on DSS-66
SATURDAY, November 14th (DOY 318)
Instrument Preparation for Leonids.
15:35 AOS on DSS-16
15:35 - 17:00 SVM Reserved
* Start of Pass Activities
* Recover CTOF #1: CEL981114101.DEL
* CEPAC safing
1) Run TSTOL procedure h_fl_estandby (duration 7 min).
While ESU is in standby mode the following parameters may flag
out-of-limits values: HIE+6V, HIE-6V, HIE-12VH, HIE-12VL,
HIEVBH1, HIEVBH2, HIEVBH3, H-E12VH
2) Run TSTOL procedure h_fl_eoff (duration 3 min).
3) Switch on ESU substitution heater to 40 % duty cycle.
4) Run TSTOL procedure h_fl_fstandby (duration 4 min).
While EPHIN is in standby mode the following parameters may flag
out-of-limits values: H+FGV, HIF+27V
5) If LION is not already off:
Run TSTOL procedure h_fl_loff (duration 3 min) before
MDI door closure.
* Verify LASCO/EIT heater settings before safing tomorrow
* Recover CTOF #2: CEL981114102.DEL
17:00 - 23:25 NRT Available
23:25 - 23:55 Station Handover (DSS-16 --> DSS-46)
23:55 - 08:15 NRT on DSS-46
07:50 - 08:20 SVM Reserved for End of Pass
08:20 LOS on DSS-46
SUNDAY, November 15th (DOY 319)
Roll the S/C prior to Leonids
15:30 AOS on DSS-16
15:30 - 19:30 SVM Reserved
* Spin Gyro
* Transition and stay in RMW mode until November 19th
* ~ 18:20 - 18:50, Roll about the X axis from
present position ( ~ +3.9 deg)
to -120 degree roll position
* Turn off SSR until November 19th
19:30 - 20:00 NRT-d for LASCO/EIT safing
* FOT : Is to ignore sector hang warnings for 30 minutes.
FlushQ and Close EIT door (~ 15 min)
* NRT : RCR l_lcpwofn - turn off our side of LCL ( 3 min)
20:00 - 20:30 SVM Reserved for LASCO/EIT safing
* FOT : /KNLPWAFN - turn off their side of LCL
* Turn on EIT/LASCO NONOP HEATERS to preset values.
20:30 - 21:30 NRT for MDI Safing
* MDI Safing in NRT
Power off the CCD camera, the Image Stabilization
System, and all mechanisms including the shutter,
MTM motors, and the PA/CAL wheels. After these subsystems
are confirmed to be powered off, the MDI controlled Optics
Package heater will be turned on and adjusted to compensate
for the decreased thermal input to the Optics Package
because of the camera electronics being powered down.
As a final step, the MDI front door will be closed after
verifying that the redundant mechanism functions properly.
21:30 - 23:25 Contingency NRT, if needed prior to Handover
* ~ 15 minute pause at 22:00 for SVM activities
* Transition to IDLE prior to Handover
23:25 - 23:55 Station Handover (DSS-16 --> DSS-46)
23:55 - 08:00 NRT Available
* Transition to MR, before end of pass
08:00 - 08:45 SVM Reserved, End of Pass
08:45 LOS on DSS-46
MONDAY, November 16th (DOY 320)
- S/C holds in Leonid-safe orientation. No instrument commanding
13:45 - 16:00 DSS-66
Set TC watchdog to 10 hours (vice 48 hours)
15:45 - 23:00 DSS-24
TUESDAY, November 17th (DOY 321)
- Expected peak of Leonid activity @ 19:43 UT +/- 3 hours
No instrument commanding
01:55 - 08:35 DSS-46
15:25 - 23:40 DSS-16
WEDNESDAY, November 18th (DOY 322)
- S/C holds in Leonid-safe orientation. No instrument commanding
03:25 - 08:00 DSS-34
15:25 - 23:10 DSS-16
22:55 - 08:10 DSS-46
THURSDAY, November 19th (DOY 323)
S/C Return to Nominal Orientation
15:25 AOS on DSS-16
15:25 - 23:25 SVM Reserved
* S/C Return to Nominal Orientation
- ~ 17:10 UT, Roll back to attitude of -7.0 degress
Solar North and start using the RSL tables again
(solar north will be per usual and S/C will
keep aligned with Solar North)
- ~ 18:00 UT, Perform Star Sensor Unit (SSU) Patch
(4 hour duration)
- Transition RMW to NM
- Transition to High Rate Telemetry
- Power on SSR
- SWAN Recovery:
n_fl_llockout & ESR flag enable
Uplink delayed command file: SWA981112101.DEL
23:25 - 23:55 Station Handover (DSS-16 --> DSS-46)
23:55 - 08:20 Additional SVM Recovery Time.
08:20 LOS on DSS-46
FRIDAY, November 20th (DOY 324)
Instrument Recovery: SWAN, CELIAS, LASCO/EIT, MDI
15:25 - 17:50 DSS-27 D/L only
19:40 AOS on DSS-16
19:40 - 21:00 SVM Reserved
* 19:40 - 20:10, Start of Pass Activities
* CELIAS STOF Recovery:
Uplink delayed command file: CEL981120301.DEL
* Stop SSR dump to go to VC2, for ~ 8 hours
(transitioning to VC3 for the station handover)
* 20:30 - 21:00, LASCO/EIT Recovery
- FOT : LASCO personnel to MOR
x_exp_prep_on
/KNLPWANN - turn on their side of LCL
k_exp_mon_ena
l_cycle_pwr_intr - use interrupted boot
21:00 - 23:05 NRT-s
* LASCO/EIT
- Check out currents (30 min)
- Perform a full NRT RCR reboot (45 min)
(l_lcpwofn, l_lcpwaonn, and startups)
- Open EIT door ( 7 min)
(FOT : to ignore sector hang warnings for 30 minutes).
* MDI
Power up the CCD camera, Optics Package mechanisms and
the Image Stabilization System.
After the MDI subsystems are verified to be in an acceptable
state, the standard observing sequence will be started while
the front door is still closed. A focus test sequence will
be run while the front door is opening and the front window
temperature is changing.
Expected that instrument recovery activities will take less
than two hours. We will need VC2 telemetry for a four hour
period to perform the front window focus tests.
* CELIAS MTOF, Recovery via NRT.
23:05 - 23:35 Station Handover (DSS-16 --> DSS-46)
23:35 - 07:45 NRT Available
07:45 - 08:15 SVM Reserved, End of Pass
08:15 LOS on DSS-46
SATURDAY, November 21st (DOY 325)
Instrument Recovery (continued): CEPAC, UVCS, CDS
15:15 AOS on DSS-16
15:15 - 16:00 SVM Reserved, Start of Pass Activities
* 16:00 - 16:30, CEPAC Recovery
1) Switch off ESU substitution heaters.
As soon as possible after 1)
2) Run TSTOL procedure h_fl_eon_1 (duration 3 min).
While ESU is in standby mode the following parameters may flag
out-of-limits values: HIE+6V, HIE-6V, HIE-12VH, HIE-12VL,
HIEVBH1, HIEVBH2, HIEVBH3, H-E12VH
3) Run TSTOL procedure h_fl_eobs_2 (duration 13 min).
4) Run TSTOL procedure h_fl_fobs (duration 4 min).
5) Run TSTOL procedure h_fl_lon (duration 3 min).
* 16:30 - 17:00, UVCS Recovery:
- TSTOLS (15 min)
Procedure Comments
X_EXP_PREP_ON Configures SOHO for UVCS ON condition,
turns off non-op heaters.
U_FL_PWRON_PR Turns UVCS A-Side ON
17:00 - 17:30 UVCS NRT-d (30 min)
17:30 - 23:00 NRT-s
* UVCS NRT-s recommission (4 hours)
* CDS Recovery via NRT.
OCD's to control substitution heater settings as needed.
(note: OCD to reduce circuit # 62 to 60 % duty cycle)
* MDI, LASCO/EIT
23:00 - 23:25 Station Handover, DSS-16 --> DSS-46
23:25 - 07:45 NRT Available
07:45 - 08:15 SVM Reserved for End of Pass
08:15 LOS on DSS-46
SUNDAY, November 22nd (DOY 326)
Instrument NRT Schedule
08:00 - 15:30 DSS-54 Tracking Pass
15:15 AOS on DSS-24
15:15 - 16:30 SVM Reserved, Start of Pass Activities
16:30 - 22:30 NRT Available
22:30 - 23:00 SVM Reserved for End of Pass
23:00 LOS on DSS-24
23:55 AOS on DSS-46
23:55 - 00:25 SVM Reserved, Start of Pass Activities
00:25 - 07:50 NRT Available
07:50 - 08:10 SVM Reserved for End of Pass
08:10 LOS on DSS-46