ISDC END OF REVOLUTION REPORT (NRT)
REVOLUTION 1412 - Report of May 10, 2014
Perigee Passage at start : 2014-05-06T19:31:55
Perigee Passage at end : 2014-05-09T19:21:46
Radiation Belt exit : 53043 km (ijd 5239.9761)
Radiation Belt entrance : 34716 km (ijd 5242.7198)
Operations Coordinator : Carlo Ferrigno
Pipeline Operator : Ph.M.
Scientist on Duty : Valentino Esposito
1. Planning summary
===================
1.1 General remarks
a) Eclipse season.
b) 2014-05-06T13:51: Integral in ESAM mode.
2014-05-07T07:00: Recovery of AOCS started.
2014-05-08: Science data back during pointing 48, except for JEM-X 1 & 2,
that were re-activated only in pointing 51.
Note: Due to the orbit changes induced by the ESAM affecting the first part of this revolution,
the time correlation is inaccurate at a level not exceeding about 1 ms.
2014-05-08T09.00: Reaction Wheel biasing and slew to scientific attitude
2014-05-08T11:10: Resumption of science activities for SPI, IBIS, OMC at planned scientific attitude
2014-05-08T13:59: Resumption of science activities for JEM-X
c) 2014-05-09T04:42: PICsIT reset followed by HEPI resync.
1.2 Pointings summary
Remarks: Only Science Windows (ScWs) of type 'pointing' are considered.
- Exposures info from POD version 1. Pointings info from TSF version 2.
- Durations in exec/planned format; data gaps and bad time intervals not excluded from total time.
- Deviations: only unexpected deviations >30 secs for pointings assigned to an exposure reported;
expected deviations (first & last pointings of an exposure longer than planned) not reported.
- Exposure 14120001: 'Cyg X-1', 5x5 (39x2500s)
39 pointings: 14120002 -> 14120040, 0s/97500s (-27h04m59s)
Deviations:
14120002 - 14120040 0/2500s: see 1.1.b)
- Exposure 14120002: 'Cyg X-1', 5x5 (3x2500s)
3 pointings: 14120041 -> 14120043, 0s/7500s (-2h05m00s)
Deviations:
14120041 0/2500s: see 1.1.b)
14120042 0/2500s: see 1.1.b)
14120043 0/2500s: see 1.1.b)
- Exposure 14120003: 'Puppis region scans' (25x3600s)
26 pointings: 14120045 -> 14120070, 44999s/50829s (-1h37m09s)
Deviations:
14120045 0/2000s: see 1.1.b)
14120046 0/2000s: see 1.1.b)
14120047 0/2000s: see 1.1.b)
14120048 2252/2000s: see 1.1.b)
14120049 2080/2000s: see 1.1.b)
- Exposure 14120004: 'Puppis region scans' (25x3600s)
28 pointings: 14120071 -> 14120098, 52755s/52487s (+4m27s)
Deviations:
14120075 1964/2000s: small diff.
14120076 1968/2000s: small diff.
14120080 1965/2000s: small diff.
- Pointings with no assigned Exposure
3 pointings: 14120001, 0044, 0099 0s/2067s (-34m26s)
2. NRT Data processing
======================
2.1 Telemetry
* Start reception: 2014-05-06T19:53:54
End reception: 2014-05-09T17:16:01
* TM gaps of more than 30 seconds:
2014-05-06T22:59:56
2014-05-07T00:02:51
2014-05-07T04:07:56
2014-05-07T04:31:51
2014-05-07T05:45:16
2014-05-07T08:33:03 - 2014-05-07T08:33:34
2014-05-07T10:05:46
2014-05-07T20:05:52
2014-05-07T22:10:17
2014-05-07T23:07:59
2014-05-08T05:07:13 - 2014-05-08T05:12:54
2014-05-08T06:24:42
* Frames missed:
2014-05-06T22:59:56 587 frames missed (229116466 to 229117052)
2014-05-07T00:02:52 629 frames missed (229176840 to 229177468)
2014-05-07T04:07:56 520 frames missed (229412211 to 229412730)
2014-05-07T04:31:51 286 frames missed (229434915 to 229435200)
2014-05-07T04:31:52 480 frames missed (229435224 to 229435703)
2014-05-07T05:45:16 492 frames missed (229505678 to 229506169)
2014-05-07T08:33:03 157 frames missed (229666728 to 229666884)
2014-05-07T08:33:34 773 frames missed (229666962 to 229667734)
2014-05-07T10:05:46 726 frames missed (229755523 to 229756248)
2014-05-07T20:05:53 721 frames missed (230331637 to 230332357)
2014-05-07T22:10:17 519 frames missed (230451260 to 230451778)
2014-05-07T23:07:59 624 frames missed (230506548 to 230507171)
2014-05-08T06:24:42 756 frames missed (230919069 to 230919824)
* ERT not in sync with UTC: -
* Statistics: Mean Rate: 15.94 frames/sec (mean)
Frames: 3980401 total Packets: 3692290 total
: 0 missed : 11098 missed
: 1837831 TM : 3675662 TM
: 2142570 idle : 0 tcmd
: 0 invalid : 16628 time
: 0 idle
: 0 invalid
* Errors:
NCTRSFRAME: invalid quality = 256 (should be 0 or 1):
2014-05-06T20:01:27 - 2014-05-06T20:01:30
2014-05-06T21:32:59 - 2014-05-06T21:33:55
2014-05-08T11:18:02 - 2014-05-08T11:18:04
2014-05-08T12:00:48 - 2014-05-08T12:01:32
2.2 Auxiliary files summary
POD OPP TSF PAF OLF ASF AHF THF ORB REVNO
-------------------------------------------------------------
1 1 1 1 73 55 1 75 1 1
2.3 Pre-processing
* Frequent errors for days 2014-05-07, 2014-05-08, 2014-05-09, respectively:
1 16 16 "Histogram rejected"
0 0 0 "OBT found too much higher"
0 3 6 "packet(s) of the Histogram are discarded"
0 4 3 "Can not store the Histogram"
0 0 0 "SpiSpectrum, decompression failed"
0 0 0 "SpiSpectrumParser, Failure"
0 0 0 "newObt-prevObt, packet is too old"
2.4 OPUS Pipelines processing
* REV: completed | errors * INPUT/SCW: completed | errors
------------------------------- ----------------------------
IREM : 72 | 0 135 | 0
ISGRI_cal : 18 | 0
ISGRI_noise: 106 | 0
IBIS_veto : 24 | 0 * QLA completed | errors
PICsIT_cal : 27 | 0 -----------------------------
JMX : 271 | 0 IBIS : 53 | 0
ilt : 1 | 0 JEMX-1 : " | 0
Archiving : 1 | 0 JEMX-2 : " | 0
2.5 ISGRI context table
2014-05-09T15:53: IIMG_SDCMOC_D20140507164020_00001.INT sent to MOC
3. Alerts
=========
3.1 All alerts except OOLs and missing scientific data
* Level 2:
2002 At least one HK (configuration) parameter changed unexpectedly
ScW: 141200000112
-> see 1.1.b)
* Level 1:
604 Exposure time is 2252 sec. instead of 2000 sec.
Pointing ID (BCPPID): 14120048
604 Exposure time is 2081 sec. instead of 2000 sec.
Pointing ID (BCPPID): 14120049
-> see 1.1.b)
605 JEM-X1/2: The mode differ for xxx sec. from the planning
JEM-X1 in ScW: 141200480010 - 141200520021
from 2014-05-08T10:56:01 to 2014-05-08T13:42:46 expected mode: 41 actual mode: 52
JEM-X2 in SCW: 141200480010 - 141200530010
from 2014-05-08T10:56:01 to 2014-05-08T13:59:12 expected mode: 41 actual mode: 52
-> see 1.1.b)
3.2 Parameter out of limits
IBIS:
-----
ScW: 141200000161 - 141200000261
I0E_MTEMP1_MMDU[0-7]
I0E_MTEMP_MDBB[1-7]
ScW: 141200000161 - 141200000171
P0E_MM[1-6]TEMP[1-4]
PICsIT reset in Science Window ID: 141200780010
P0S_MM[1-8]LTC1
P0S_MM[1-8]LTC2
P0S_MM[1-8]RTC1
P0S_MM[1-8]RTC2
P0E_MMMCRER
-> see 1.1.c)
OMC:
----
Eclipse season, ScW: 141200000012 - 141200000112
PCURR__1
SVOLT___M5
SVOLT___M12
SVOLT___P5
SVOLT___P12
SVOLT___P36
ScW: 141200480010
CENT__INFO
SPI:
----
Due to ESAM. In Many SCW
T__PD__DSP_MTMP__L
T__AS__UPR_MRG__L[1-6]
3.3 Missing scientific data
IBIS:
-----
ScW: 141200480010
These data structures are missing:
PICS-SIMH-RAW (or ALL) for mode Observation standard (41)
PICS-SISH-RAW (or ALL) for mode Observation standard (41)
4. Instruments checks (IOSM)
=====================
2014-05-09T04:46:08:
IBIS OEM: DPE-IASW HEPI resynchronized.
-> see 1.1.c)
5. Science (VE)
==========
5.1 Summary
a) Planned observations
i EXP_ID OBS_ID SRC_NAME POINT_NUM POINT_LEN
1 14120001 11297000003 Cyg X-1 39 2500
2 14120001 11200180001 Cyg X-1 39 3572
3 14120001 11200160001 Cyg X-1 39 3572
4 14120002 11297000003 Cyg X-1 3 2500
5 14120002 11200180001 Cyg X-1 3 3572
6 14120002 11200160001 Cyg X-1 3 3572
7 14120003 11200040014 Puppis region scans 25 3600
8 14120004 11200040015 Puppis region scans 25 3600
b) Solar activity & miscellaneous
Low
5.2 IBAS
a) GRB in ISGRI FOV: No
b) GRB in SPI-ACS:
2014-05-08T03:03:50 (OFFLINE): GRB 140508A also detected by Fermi/GBM (Yu & Goldstein 2014,
GCN 16224). Multi-peak structure with brightest peak at T0+9sec, and two further prominent
peaks at T0+30sec and T0+45sec.
c) Other IBAS alerts: No
5.3 TOOs: No
6. Anomalies report:
====================
Integral in ESAM.
The cause of the ESAM was an On-board autonomous momentum dump which occurred after a slew end
but while the manoeuvre timer was still running.
Cause of the AMD was an (attempted) instantaneous error correction of about 0.6dgrees in roll when the Sun Steering Law was engaged.
The attitude reconstruction and therefore automatic TPF update for this slew had failed due to a poor
guide star causing a certain amount of attitude jitter. After attempting to generate the TPF manually
and failing the SPACON correctly contacted the FD on-call support. The FD engineer managed to generate
an attitude and TPF based on reduced STR data. Unluckily this attitude was slightly wrong due to the
uncertainty of the Guide star in use. When the TPF generated based on this data was executed it led to
the correction roll at SSL enabling above.
The ESAM occurred shortly before perigee, the sequence of orbital events was:
13:51 ESAM entry
17.16 LOS Kiruna pre perigee
20.11 Eclipse entry
20.57 Eclipse exit
21.28 AOS Kiruna
The ESAM entry functioned correctly, putting the service and payload modules into a safe status.
The SPACON reacted promptly and correctly applying CRP_AOC_0500 (ESAM Entry First actions) to ensure
safety of the satellite.
Since there was little time to react to the ESAM pre-perigee it was decided to delay the start of the
recovery until the next revolution. Additionally the low manpower and expertise available due to the
ongoing SpaceOps conference compounded the logistical problems of recovery. bearing this in mind it
was decided to start the recovery at 07.00 on 7/5/2013.
This meant that Integral would spend the night in a stable safe ESAM configuration, one complication
was that this meant passage through eclipse in ESAM mode, which had never been done before in flight.
Unlike XMM Integral does not control the attitude in eclipse in ESAM mode and attitude errors can
build up, at eclipse exit Integral reacquires the sun reference and manoeuvres back to a sun pointing
attitude.
In order to monitor the eclipse passage and be able to react in case of necessity, extra Perth
support was scheduled through perigee. In the event Integral functioned flawlessly, with only a
modest drift in attitude (1.3DEG roll and 4.2 in pitch) which was very quickly corrected by the
controller once the FCE eclipse timer had expired.
Recovery of AOCS then started at 07.00 on 7/5/2014
The high level sequence of events was:
07.00 CRP_AOC_0501 ESAM RECOVERY TO SSA (including early switch-on of Reaction Wheel assemblies to
allow them to reach operating temperature)
09.00 CRP_AOC_0502 ESAM RECOVERY TO SSA (2)
12.00 CRP_AOC_0503 ESAM RECOVERY: STR AND RW RECONFIGURATION IN SSA
13:30 CRP_AOC_0504 ESAM RECOVERY: FURTHER RECOVERY FROM SSA TO IPS
15.00 CRP_AOC_0505 ESAM RECOVERY: IPS CONFIGURATION FOR NOMINAL ORBIT
In parallel to the AOCS recovery activation of the instruments started
At the end of the day Integral was stable with AOCS in the nominal IPS mode and fully configured.
The planned scientific attitude had not yet been achieved, the attitude was unconstrained for at
least 2 days, similarly the wheel speeds would not hit any threshold for at least 2 days.
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