INTEGRAL Commissioning & PV planned activities

• Lift off at 04:41
• Separation of 4th Proton stage and spacecraft from third stage at 04:50
• 4th stage main engine burn to enter transfer orbit from 05:43 until 05:50
• Separation of INTEGRAL spacecraft from 4th Proton stage at 06:13
• Solar arrays deployed at 06:31
• The remaining activities for this revolution include:

+ Switch on reaction wheel assembly
+ Switch on star tracker
+ Transition to inertial pointing and slew mode
+ Switch on and activate the Radiation Monitor IREM
+ Slew to outgassing attitude
+ Start of SPI activation, low temp outgassing
+ Start of JEM-X activation
+ Start of IBIS activation
+ Start of OMC activation
+ Slew to Perigee Passage attitude
+ Perigee height  = 700 km

The main activities during this revolution include:

• IBIS electronic boxes activations
• JEM-X electronic calibration
• OMC CCD health check
• OMC CCD calibration (cover closed)
• OMC cover release (on 2002/10/21 at 18:15 UTC) and CCD/optics test with cover open
• OMC imaging at Perigee Passage attitude

The main activities during this revolution include:

• IREM verification
• Slew to perigee raise burn attitude
• First perigee raise maneouvre (2002/10/23, 02:25 UT) using INTEGRAL's on-board propulsion system (new perigee height = 2235 km)
• JEM-X and OMC instrument configuration after perigee raise burn
• JEM-X high voltage activation
• OMC imaging at perigee raise attitude and at outgassing attitude
• IBIS data processing electronics and periphery s/w dump
• SPI data processing electronics s/w dump

The main activities during this revolution include:

• Tune IREM configuration for nominal operations
• Slew to perigee raise burn attitude
• Adjust IREM particle radiation background thresholds on-board for SPI, IBIS, JEM-X, OMC
• SPI configuration upload and functional test with hot detectors
• Instruments safing for perigee raise burn
• Second perigee raise maneouvre (2002/10/26, 18:44; new perigee height = 4538 km)
• Third perigee raise maneouvre (2002/10/26, 20:47; new perigee height = 7033 km)
• Resume instruments configuration
• JEM-X HV adjustment
• JEM-X activation completed (JEM-X (1): 27 Oct, JEM-X (2): 28 Oct) and the instrument is fully operational from this point in time. Any further activity is dedicated to the optimization of the instrument configuration.
• OMC imaging at various attitudes (perigee passage, out-gassing, perigee raise burn)
• OMC data dump digital processing electronics

The main activities during this revolution include:

• Start SPI high temperature outgassing
• SPI passive cooling (start)
• SPI event trigger threshold checks
• SPI anti-coincidence sub-system calibration and tuning of front end electronics
• JEM-X HV adjustment
• JEM-X diagnostic data collection
• Instruments safing for perigee raise burn
• Fourth perigee raise maneouvre (2002/10/29, 20:16; perigee height = 9040 km)
• Fifth (and last) perigee raise maneouvre (2002/10/31, 07:34; perigee height = 9078 km)
• Resume instruments configuration
• OMC imaging at various attitudes (perigee passage, out-gassing, perigee raise burn, apogee adjustment maneouvre)
• Apogee adjustment maneouvre

The main activities during this revolution include:

• Continuation of SPI tuning of anti-coincidence sub-system tuning of front end electronics
• SPI anti-coincidence calibration (cont'd)
• Start of SPI active cooling
• AOCS thruster calibration
• SPI pulse-shape discrimination threshold adjustment
• OMC imaging at star tracker calibrations attitudes
• End of LEOP (Launch and Early Operations) on 01 Nov, 16:20 UTC
• Misalignment calibration and disturbance torque calibrations for star trackers and fine sun sensors

With revolution 7 the transition phase to nominal PV (performance and verification) phase will begin. The transition phase will last until the end of revolution 13. The following activities are planned:

• Slew to PV target "empty field 1" (RA, Decl) = (09:59:21.79, -00:58:55.2). During PV phase the empty field will be used for background studies.
• IBIS switch on and check 3 out of 8 detector sections.
• SPI camera (Germanium detectors) switch on at 117 K
• SPI: analyse pulse shape discrimination events
• SPI: check spectra in 5x5 dithering mode
• SPI: instrument health status main check
• SPI: camera performance check during cooling until 90 K det temperature
• Calibation of the attitude and orbit control system (AOCS), 58 pointings

The main activities during this revolution include:

• IBIS switch on and check 5 remaining detector sections
• Star tracker bright object test
• IBIS nominal activation: the initial IBIS activation is completed and the instrument is fully operational from this point in time. Any further activity is dedicated to the optimization of the instrument configuration.

Revolution 9 (2002/11/09 - 2002/11/12)

The main activities during this revolution include:

• SPI: camera performance check at operational Germanium detector temperature of 90K
• SPI: the initial activation is completed (09 Nov) and the instrument is fully operational from this point in time. Any further activity is dedicated to the optimization of the instrument configuration.
• SPI: check influence of high energy clamping of preamplifier
• SPI: pulse shape discrimination threshold and analogue front end electronics energy threshold calibrations
• IBIS: veto photomultiplier high voltage calibration (empty field 1)
• IBIS: veto-PICSIT delay anti-coincidence calibration
• IBIS: veto-ISGRI delay anti-coincidence calibration
• IBIS: PICSIT-ISGRI synchronisation - Compton mode optimisation
• IBIS: veto threshold and zoning optimisation
• JEM-X: diagnostic data collection on Cyg X-1

Revolution 10 (2002/11/12 - 2002/11/15)

The main activities during this revolution include:

• JEM-X: data taking format verification on complex field (LMC- X1 and LMC X-3)
• SPI: Germanium detector high voltage on and threshold update/check for analogue front end electronics and pulse shape discrimination
• SPI: timing optimisation; time tag alignment for pulse shape discrimination/analogue front end electronics
• SPI: veto pulse and time tag alignment
• SPI: veto pulse and pulse shape discrimination alignment
• SPI: Start pulse shape discrimination (PSD) calibration (empty field 1), step 1

The main activities during this revolution include:

• SPI: Determine influence of veto sub-system thresholds on background
• SPI: Determine influence of saturated events on background
• SPI: Determine influence of BGO veto and plastic veto parameters on sensitivity: anti-coincidence (veto) subsystem best configuration (Cygnus X-1 pointing with hexagonal dither, total exposure = 91.8 ksec)
• OMC: Flat field exposure sequence

The main activities during this revolution include:

• Spacecraft safe pointing for Leonids passage (18 Nov. 16:45 until 19 Nov. 22:45 UTC)
• SPI: plastic veto effects on sensitivity (empy field 1)
• PV calibration observation (see table):

The main activities during this revolution include:

• SPI: BGO veto and plastic veto final configuration, empty field 1 (see revolution 7) , 93.9 ksec (PV)
• SPI: measurement of the background with one  BGO veto unit inactive
• SPI: pulse shape discrimination calibration, step 2a and pulse shape dsicrimination library uplink (empty field 1, 32.4 ksec PV)
• SPI: pulse shape discrimination calibration, step 2b and data acquisition in photon-by-photon mode (24.5 hrs)

With this revolution the Performance and Verification (PV) phase proper will begin. The main activities during this revolution include:

• PV calibration observation :

• Ground segment outage 25 Nov 21:29 until 26 Nov 00:40, no telemetry available

The main activity during this revolution is:

• PV calibration observation :

The main activity during this revolution is:

• PV calibration observation :

• Ground segment outage, NASA Goldstone ground station not available 02 Dec, 19:19 - 22:40, no telemetry available

The main activity during this revolution is:

• PV calibration observation :

• JEM-X detector off-axis calibrations along +y at Cyg X-1 off-axis positions RA/Decl = 301.225/+33.724, 302.022/+33.977,

302.811/+33.231. 303.585/+31.476, 304.373/30.738 with a duration of (1ksec,2ksec,4,ksec,10ksec,50ksec) respectively

The main activities during this revolution are:

• PV calibration observations :

The main activities during this revolution are:

• PV calibration observations:

• Ground segment outage 11 Dec, 18:42 - 23:40, no telemetry available

The main activities during this revolution are:

• PV calibration observations:

The main activities during this revolution are:

• PV calibration observations:

• Station outage from 16/12 20:06 to 17:12 00:40
• Start of nominal end of Commissioning Phase 17/12 06:30

 

 

The main activities during this revolution are:

• PV calibration observations:

The main activities during this revolution are:

• PV calibration observations:

The main activities during this revolution are:

• OMC flat field sequence (36 ksec)
• IBIS in photon-by-photon mode for 90 ksec
• PV calibration observations:

The main activities during this revolution are:

• OMC flat field #8, 13 h elapsed time
• PV calibration observations:

• Galactic plane scan (24.2 ksec) from (RA, Decl.) = (19:45:44.81,+37:22:21.0) on 28 Dec, 05:08 (UT) until (RA, Decl.) = (01:41:35.07, +64:29:41.0) on 28 Dec, 09:19 (UT)
• End of nominal PV cal observations
• Start of AO-1 observing programme. The short term schedule for AO-1 can be found here.