SOHO Nov. 1999 Leonids Timeline
SOHO Nov. 1999 Leonids Timeline
November, 1999 Spacecraft Activities Timeline
MONDAY, November 8 --- Instrument Safing
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15:45 - 16:45 SVM Reserved
16:45 - 19:05 NRT Available with Pauses
* SUMER door close
Then Pause to have FOT disable off-pointing
and ESR flag to SUMER
19:05 - 19:50 Station Handovers:
DSS-24 to DSS-27 then DSS-27 to DSS-46
19:50 - 20:00 Switch Submode 5 --> 6
20:00 - 23:20 NRT Available
* ~ 20:00, LASCO door close
* CDS doors close
23:20 - 23:50 SVM Reserved for End of Pass Activities
TUESDAY, November 9 --- Momentum Management
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04:25 - 07:50 Short Contact on DSS-46
09:15 AOS on DSS-61
09:15 - 10:15 SVM Reserved
* CELIAS STOF safing uplink: CEL991109301.DEL
(will recover on 20 November, after Leonids)
10:15 - 14:00 NRT Available
* 13:00, UVCS safing prior to maneuver.
* MDI sends command for calibrations just prior to 14 UT.
14:00 -15 :00 SVM Reserved
* Extra hour of VC2 for MDI
15:00 - 15:30 NRT Available
* MDI commanding needed to end monthly calibration.
15:30 - 16:00 SVM Reserved, End of Pass
16:00 LOS on DSS-61
19:20 AOS on DSS-16
19:20 - ~01:00 SVM Reserved
Note: We stay in high rate telemetry
for the entire maneuver activities.
* Maneuver Prep
- Verify Instruments Safe
- SWAN safing: n_fl_llockin & ESR flag disable
- Transition NM to RMW
- MDI ISS_loop open
- Disable experiment off-pointing flag to:
UVCS, MDI, LASCO/EIT
* Momentum Management
* Maneuver End
- Transition RMW to NM
- Enable experiment off-pointing flag to:
UVCS, MDI, LASCO/EIT
- MDI ISS_loop close
- SWAN recovery: n_fl_llockout & ESR flag disable
(2 hours after burn completion)
~ 01:00 - 04:15 NRT Available
WEDNESDAY, November 10 --- Instrument Recovery (con't)
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04:15 - 04:45 SVM Reserved, Station Handover
04:45 - 07:45 NRT Available
07:45 - 08:10 SVM Reserved, Station Handover
08:10 - 14:00 NRT Available
* ~ 13:00, UVCS Recovery
14:00 - 15:20 SVM Reserved, Daily Activities + Station Handover
15:20 - 22:30 NRT Available
* Instrument Recovery
22:30 - 23:00 SVM Reserved, Station Handover
23:00 - 07:55 NRT Available
* ~ 21:50, CDS open doors.
THURSDAY, November 10 --- Instrument Recovery (con't)
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07:55 - 08:10 SVM Reserved, Station Handover
08:10 - 14:00 NRT Available
14:00 - 15:00 SVM Reserved
15:00 - 15:30 NRT Available
15:30 - 19:50 DSS-27, considered Downlink only
19:30 - 19:50 SVM Reserved, Station Handover (DSS-27 --> DSS16)
19:50 - 23:15 NRT Available
* ~ 20 UT, LASCO open doors sometime on Thursday.
Monday, November 15 -- Transit of Mercury 17:42 - 02:00 UT
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07:45 - 13:00 NRT Available
12:00 - 14:00 SVM Reserved
* CEPAC safing via TSTOL (12-13)
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 30 % 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) Run TSTOL procedure h_fl_loff (duration 3 min)
before MDI door closure.
Note: MDI not closing door this year.
* Normal SVM Activities
14:00 - 15:00 NRT Available
* UVCS Safing
UVCS needs 1.5 hours of NRT commanding to
ramp and power down detectors and mechanisms
high voltages, and close door 90 % of the way.
15:25 - 15:40 Station Handover, DSS-66 to DSS-24
15:40 - 16:30 NRT Available
* UVCS Safing
UVCS needs 1.5 hours of NRT commanding to
ramp and power down detectors and mechanisms
high voltages, and close door 90 % of the way.
~ 16:30 -17:00 SVM Reserved
* After UVCS NRT completed, power off UVCS
Run TSTOL: u_fl_pwroff
Turn on substitution heaters:
Circuit #84 (TSU) to 70 %
Circuit #85 (REU) to 100 %
17:00 - 19:10 NRT Available
* just prior to 18:00 UT, Put SSR into record.
19:10 - 19:30 SVM Reserved for Station Handover (DSS-24 --> DSS-46)
19:30 - 02:00 NRT Available
* ~ 23:30 UT, MTOF safing (30 minutes) -- 5 NRT commands.
Four high voltage supplies will be turned off, and the 4 MCP
supplies will be left on (3 of them at a much reduced voltage).
We will leave our temperamental 'Ion' MCP supply at its normal
setting. There are 5 commands we'll send, all in NRT;
should take about 30 minutes.
November 16 -- Roll for Leonids
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02:00 SVM Reserved
* Take SSR out of record, 60 min of VC2, then VC3.
Save SSR dump til end of pass ( dump ~ 09:30-13 UT ish.)
02:10 - 07:30 NRT Available
07:30 - 07:50 SVM Reserved for Station Handover
07:50 - 12:00 NRT Available
* 11:00, CDS NRT
Close both Doors. NRT 10 mins
CDS to follow 'Primary Event Recovery' script
sections 1,2,3,4 and 5 only, which essentialy does:
Transit to SBY Mode NRT 15 mins
Transit to ZZZ Mode NRT 15 mins
CDS Power will remain ON
* 11:30. LASCO/EIT NRT
1) NRT: Close C2 and C3 doors, using normal method (not super-closed).
2) NRT: Flush queue and close EIT door.
3) NRT: Turn off instrument side of LCL using RCR l_lcpwofn.
12:00 - 13:00 SVM Reserved
* LASCO/EIT:
4) FOT: Turn off spacecraft side of LCL using /KNLPWAFN.
Note: The FOT sessions must be scheduled within minutes of the
NRT session.
5) FOT: Turn on nominal side LASCO/EIT nonop heaters to the following (preset)
settings:
Nominal side: Channel 71 (EIT) 100%
Channel 70 (LASCO COB) 80%
Channel 87 (LASCO LEB) 90%
and set/verify the following.
Redundant side: Channel 71 (EIT) 100%
Channel 70 (LASCO COB/LEB) 80%
Also, disable the experiment off-pointing and
ESR warning flag to LASCO/EIT.
* CDS:
Switch on s/c substitution heater # 62 @ 80% duty cycle
Switch on s/c substitution heater # 63 @ 60% duty cycle
Also disable the ESR warning flag to CDS.
13:00 - 13:30 SVM Reserved, End of Pass
15:25 AOS
15:25 - ~22:00 SVM Reserved
* Typical SVM Activities
* ~ 16:30, Maneuver Preparation
- (Skip SWAN Instrument safing step, but
open ISS loop for MDI..)
- Transition to RMW
* Profile in CRP Script
- Transition to CRP
- Go to Medium Rate Telemetry
- Roll the S/C at a rate of ~ 30 degrees per hour
(takes ~ 4 hours to roll ~ 120 degrees)
* Other SVM activities,
- SSR off
- TC watchdog to 10 hours
- SSU off.
* Safe SWAN -Z sensor only by delayed command file:
SWA991115091.DEL
22:00 - 23:00 NRT Available
* MDI Safing (less than one hour in NRT).
MDI door remains open.
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 adjusted to compensate
for the decreased thermal input to the Optics Package
because of the camera electronics being powered down.
(Note: No SVM Reserved activities are needed at the
end of this pass so there can be commanding
until LOS).
23:05 LOS
01:40 - 05:40 Short pass on DSS-42.
All instruments must be safed by 02 UT... therefore
necessary to safe all on previous pass.
WEDNESDAY -- THURSDAY, November 17 - 18:
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Instruments and S/C remain in safe configuration for Leonids,
until 02 UT on November 19.
November 19th -- Roll the Spacecraft Back, Momentum Management, Station Keeping
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02:00 - 05:30 NRT Available
* MDI recovery in NRT after 02 UT.
(Note: Experment off-pointing flag disabled
at this time to all teams).
MDI loop remains open.
* CELIAS MTOF recovery in NRT after 02 UT.
05:30 - 05:50 SVM Reserved for End of Pass
12:25 AOS on DSS-66
12:25 - ? SVM Reserved
* Start of Pass Activities.
- SSU on
- CCD cool off, star mapping
* Maneuver Prep Script
- Only:
Turn on Cat Bed heaters & Redundant/Confirm Open ISS loop for MDI
* Profile in CRP Script
- ~ 14:00 Roll the Spacecraft back to Nominal.
at rate ~ 30 degrees per hour.
Take until ~ 18:00 to complete.
- Transition from CRP to RMW
- Transition from Medium Rate to High Rate Telemetry
- VC2 for MDI (at least 15 minutes)
* Maneuver Preparation
- SWAN:
Send delayed command file to restore nominal configuration:
SWA991117155.DEL
Then, SWAN Safing: n_fl_llockin & ESR flag disable
- FOT open MDI ISS loop (redundant check loop open)
* Momentum Management ( ~ 2 hours, ~ 50 grams)
* Station Keeping ( ~ 10 minutes, ~ 60 grams)
* Maneuver End Activities
- Enable experiment off-pointing flag to: MDI and UVCS
- FOT close MDI ISS loop
- SWAN recovery: n_fl_llockout and ESR flag enable
(2 hours after last burn completion)
Then uplink: SWA991119151.DEL
- Turn on SSR and reset TC watchdog
* Transition to VC2 (if not already in) prior to NRT
enabled.
? - 05:30 NRT Available
05:30 - 6:00 SVM Reserved, End of Pass.
Saturday, November 20th -- Instrument Recovery
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09:45 - 14:45 Short Pass on DSS-61
15:10 - 17:30 SVM Reserved, Start of Pass Activities
* CELIAS STOF recovery uplink: CEL991120301.DEL
* 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 fla
g
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) after
MDI door opening.
Note: MDI not closing door this year.
* LASCO Recovery:
-----------------
FOT : LASCO personnel to MOR (monitor LIPWA current).
x_exp_prep_on
/KNLPWANN - turn on their side of LCL
k_exp_mon_ena
l_cycle_pwr_auto - use automatic boot (35 min)
FOT : Is to ignore sector hang warnings for 30 minutes.
Enable experiment offpoint flag to LASCO/EIT.
LASCO/EIT: ENABLE ESR warning flags to LASCO/EIT.
17:30 - 19:30 NRT-s Available (this includes 1 hour contingency)
* LASCO NRT
NRT: Software reconfiguration (30 min)
NRT : Open EIT door.
eit_door_open_full.sce (7 min)
FOT : Is to ignore sector hang warnings for 30 minutes.
19:30 - 20:00 SVM Reserved
FOT turns UVCS on using the following interactive TSTOL
procedures: Duration ~ 15 minutes
K_SET_EXP_MAIN (configures COBS for UVCS-A Side ON) ~5
minutes.
X_EXP_PREP_ON (configures SOHO for UVCS ON condition, turns off non-
op heaters). The instrument and electronics unit are now deprived of all
heat. ~5 minutes
U_FL_PWRON_PR (turns UVCS A-Side ON) ~3 minutes
Telemetry point UIPWA (total current draw) should go to values between
~1.0 and 2.1 Amps (varying due to heater chopping). If this does not
happen an Emergency Response might be needed. This would require
the FOT to power UVCS back off using TSTOL U_FL_PWROFF, followed by
re-setting the UVCS substitution heaters circuit #84 (the telescope
structure) to 70% and Circuit #85 (the remote electronics unit) to 100%.
20:00 - 20:30 NRT-d for UVCS
UVCS then completes the re-start via NRT commanding procedures.
Approximately 4 hours will be required to restore UVCS to a safe condition,
and that NRT period MUST begin within 30 minutes of the UVCS turn-on.
More time beyond the 4 hours will be needed to restore UVCS to full
operation.
20:30 - 20:45 SVM Reserved
* CDS substitution heaters (circuit #62 and #63 should be
switched off and their values reset as follows:
Circuit 62 80% (Primary & Redundant)
Circuit 63 90% (Primary & Redundant)
And Enable ESR warning flag
20:45 - 21:30 NRT-s Available
Contingency -- If next station is "red" or otherwise
anomalous, perform UVCS contingency as per OCD.
21:30 - 22:00 SVM Reserved for Station Handover
22:00 - 04:40 NRT-s Available
04:40 - 05:10 SVM Reserved, End of Pass.
SUNDAY, November 21th -- Instrument Recovery
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Day off for FOT, Instrument Recovery in NRT only.
07:30 - 13:45 Short pass on DSS-61
15:05 AOS on DSS-24
15:05 - 16:05 SVM Reserved, Start of Pass.
16:05 - 18:45 NRT-s Available
* Instrument Recovery
18:50 - 19:00 Station Handover, DSS-24 to DSS-46
19:00 - 02:50 NRT-s Available
* Instrument Recovery
02:50 - 03:20 SVM Reserved, End of Pass.
03:20 LOS on DSS-46
MONDAY, November 22th -- Instrument Recovery
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07:25 - 14:15 Short Pass on DSS-61
15:10 AOS on DSS-24
15:10 - 16:10 SVM Reserved
* Typical Start of Pass Activities
* Enable ESR and off-pointing flag to LASCO/EIT
16:10 - 18:50 NRT Available
FOT : Is to ignore sector hang warnings for 30 minutes.
NRT : After CDS, open LASCO doors:
c3_door_open_full.sce (7 min)
c2_door_open_full.sce (7 min)
c1_door_open_full.sce (7 min)
18:50 - 19:10 SVM Reserved, Station Handover, DSS-24 to DSS-46
19:10 - 05:20 NRT Available
05:20 - 05:50 SVM Reserved, End of Pass