Minimize AATSR

 The AATSR menu to your right provides information concerning the SPPA activities for this instrument. 

 

A brief description of the instrument, its operations and main mission highlights is available in the sections below:

Sensor Description   |    Sensor Modes   |   Mission Operations Overview     

Minimize Mission Operations Overview

In the following sections you can find the different Events that were affecting the ENVISAT AATSR mission:

Minimize Housekeeping Activities

Outgassings and Blackbody Crossover Tests

These two routine housekeeping activities affected AATSR data quality during the Envisat mission. The tables below list the periods during which they were conducted. For full information on these activities, see the AATSR Events Report.

Table 1. AATSR outgassing periods

Start time End time Orbit start Orbit end Details
22/07/2002 09:06 24/07/2002 11:21 02051 02081 Commanded outgassing
31/01/2003 09:39 03/02/2003 17:15 04814 04861 Commanded outgassing
01/08/2003 09:17 05/08/2003 10:34 07419 07477 Commanded outgassing
25/11/2003 10:10 28/11/2003 18:30 09080 09128 Commanded outgassing
16/04/2004 08:40 19/04/2004 17:04 11126 11173 Commanded outgassing
23/07/2004 09:00 27/07/2004 15:39 12529 12589 Commanded outgassing
19/11/2004 10:00 22/11/2004 18:10 14233 14281 Commanded outgassing
08/04/2005 08:19 11/04/2005 13:16 16236 16283 Commanded outgassing
22/08/2005 08:46 25/08/2005 15:07 18183 18230 Commanded outgassing
16/12/2005 09:40 19/12/2005 15:07 19844 19891 Commanded outgassing
18/05/2007 08:19 21/05/2007 11:50 27258 27303 Commanded outgassing
24/09/2007 12:27 28/09/2007 13:39 29107 29165 Envisat service module (SM) anomaly + outgassing
23/06/2008 07:46 26/06/2008 14:18 33012 33059 Commanded outgassing
25/11/2008 08:10 28/11/2008 21:33 35231 35282 Commanded outgassing
26/05/2009 09:32 29/05/2009 21:09 37837 37887 Commanded outgassing
11/01/2010 09:01 14/01/2010 14:07 41129 41175 Commanded outgassing
29/06/2010 08:49 02/07/2010 20:31 43548 43598 Commanded outgassing
20/10/2010 16:12 27/10/2010 18:55 45170 45272 Commanded outgassing (Note 1)
04/04/2011 13:50 06/04/2011 15:41 47553 47583 Envisat SM anomaly + outgassing
07/10/2011 08:19 10/10/2011 14:49 50222 50269 Commanded outgassing
23/01/2012 07:28 26/01/2012 13:52 51773 51820 Envisat SM memory fault + outgassing

Note 1: Data were generated and are available in the archive from the beginning of this outgassing period. However, from 23/10/2010 22:47 to 27/10/2010 18:55 (orbits 45217 to 45272), AATSR was taken out of MEASUREMENT mode for manoeuvres connected with the Envisat Mission Extension.

 

Table 2. AATSR blackbody crossover test periods

 

Start time End time Orbit start Orbit end
30/04/2002 02/05/2002 (not known) (not known)
21/04/2004 07:42 23/04/2004 08:17 11197 11226
17/05/2005 07:47 19/05/2005 08:24 16794 16823
26/06/2006 07:20 28/06/2006 08:10 22591 22620
13/11/2007 07:53 15/11/2007 08:30 29820 29849
21/04/2009 07:53 23/04/2009 08:31 37335 37364
26/05/2010 08:18 28/05/2010 08:55 43061 43090
25/05/2011 10:46 27/05/2011 11:12 48284 48313

 

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Minimize Mission Events - Commissioning Phase

Table listing all major events for the AATSR instrument during the Envisat mission lifetime: 01 March 2002 - 08 April 2012.

 

Year Date Time Orbit Event(s)
COMMISSIONING PHASE
2002 01-Mar     Launch from Kourou, French Guyana
06-Mar     First Platform data received at RAL, covering 4 days of operations.
09-Mar 09:25   AATSR was commanded into STANDBY mode from OFF for the first time since launch. The first data confirmed that the cooler was clamped as expected.
11:00   The cooler was un-clamped and AATSR was configured for in-flight operations.
10-Mar     STANDBY mode. No AATSR operations.
11-Mar     STANDBY mode. No AATSR operations.
12-Mar 17:45   AATSR commanded from STANDBY to HEATER mode.
13-Mar     AATSR in HEATER mode.
14-Mar     HEATER mode. No AATSR operations.
15-Mar 14:37   AATSR switched to MEASUREMENT mode. First instrument source packets generated.
16-Mar     MEASUREMENT mode. No AATSR operations.
24-Mar     AATSR in MEASUREMENT mode.
10:00   Visible channel gains updated following analysis of science data.
26-Mar 09:15   The instrument was restarted with the SCC cooling the FPA for the first time.
10:39   The scan mirror was restarted and the cooler set to maximum amplitudes.
14:07   The FPA reached 80K and AATSR automatically entered HEATER mode. The IR gains and offsets were being set by the auto-gain offset control loop.
15:43   AATSR was commanded back into measurement mode.
03-Apr 08:26   AATSR was commanded into HEATER mode with the cooler drives at zero amplitude and the scan mirror switched off in preparation for the ENVISAT orbit control manoeuvre.
09-Apr 08:34 00562 The scan mechanism was restarted, the auto-gain-offset loop re-enabled and AATSR was commanded back into MEASUREMENT mode.
15-Apr 11:59 00650 The instrument entered STANDBY/REFUSE mode due to the cooler body temperature dropping below the lower switchdown limit of -10C.
17-Apr 11:02 00678 AATSR commanding was re-enabled and cooler compressor and displacer amplitude initial settings commanded. Transition to HEATER mode could not be started because the Cooler Body Temperature remained below the switch-on condition of -8C and rising during passes.
18-Apr 17:37 00696 The HEATER mode command was executed and AATSR immediately returned to STANDBY/REFUSE mode. The immediate cause was a command echo failure.
19-Apr     An Anomaly Review Board was held to agree a recovery plan for AATSR and identify further investigations. Memory Dump of the RAM area was taken and the instrument returned to STANDBY mode.
17:03 00710 A further attempt to return to HEATER mode was made but resulted in AATSR immediately returning to STANDBY/REFUSE mode.
23-Apr     AATSR Recovery Procedure AATSR-IOR-0009
11:13 00764 AATSR ICU reset and returned to STANDBY mode
12:53 00765 Cooler initial amplitudes sent
15:00 00766 AATSR transition to HEATER mode started
16:11 00767 Cooler default amplitudes sent
19:33 00769 AATSR in HEATER mode
24-Apr     AATSR Recovery Procedure AATSR-IOR-0009
07:26 00776 Scan mirror started
07:27 00776 AATSR in MEASUREMENT mode
    Visible channel auto-offset loops not enabled and signal channels at hardware default gain settings
26-Apr     AATSR in MEASUREMENT mode
13:00 00808 Visible channel auto offset loop enabled and visible channel gains commanded
30-Apr     Part 1 of Blackbody Cross-over Test started -(S-D-P-3.5)
01-May     Part 2 of Blackbody Cross-over Test started -(S-D-P-3.5)
02-May     Blackbody Cross-over Test completed
    Blackbody temperatures stabilised and auto-gain/offset loop re-enabled
03-May     Scan Mirror Checkout S-D-P-3.3
12:41 00908 Snapshot-2 commanded to 2002
14:15 00909 Snapshot-2 commanded to 2003
15:52 00910 Snapshot-2 commanded to 2004
17:30 00911 Snapshot-2 commanded to 2001
04-May     Scan Mirror Checkout S-D-P-3.3
10:34 00921 Snapshot-2 commanded to 2002
12:05 00922 Snapshot-2 commanded to 2003
13:44 00923 Snapshot-2 commanded to 2004
15:23 00924 Snapshot-2 commanded to 2001
05-May     Scan Mirror Checkout S-D-P-3.3
08:15 00934 Snapshot-2 commanded to 2002
09:55 00935 Snapshot-2 commanded to 2003
11:34 00936 Snapshot-2 commanded to 2004
13:13 00937 Snapshot-2 commanded to 2001
06-May 09:34 to 15:59 00949 to 00953 IOR#11 A207 Reporting Anomaly Test performed
    Commands sent to disable and re-enable auto gain offset loop and check command execution reporting in Report Formats
09-May 09:36 to 17:50 00992 to 00997 Pixel Map Optimisation Test performed
11-May 06:50 01019 Pixel Map with Extended Along-Track Swath loaded
10:14 01021 Default Pixel Map loaded
12:54 01022 ENVISAT PL in SUSPEND (AATSR OFF)
15-May     AATSR Recovery from PL Suspend
08:07 01077 AATSR in STANDBY Mode
11:25 01079 Transition to HEATER Mode started, cooldown commenced
12:58 01080 Cooler to nominal compressor and displacer amplitude
16:02 01082 Transition to HEATER Mode complete
16:19 01082 Scan Mirror started
16:21 01082 AATSR to MEASUREMENT Mode
16-May     AATSR Auto Gain Offset Loop Test S-D-P-3.8
14:20 01095 Loop frequency commanded to 2048 scans
17:41 01097 Loop frequency commanded to 4096 scans
21:02 01099 Loop frequency commanded to 8192 scans
17-May     AATSR Auto Gain Offset Loop Test S-D-P-3.8
10:36 01107 Loop frequency commanded to 16384 scans
18-May     AATSR Auto Gain Offset Loop Test S-D-P-3.8
11:46 01122 Loop frequency commanded to 32768 scans
21:49 01128 Loop frequency commanded to 1024 scans (default)
19-May     AATSR Auto Gain Offset Loop Test S-D-P-3.8
11:10 01136 Number of temp samples set to 64 and number of irradiance samples set to 32
12:50 01137 Number of temp samples set to 128 and number of irradiance samples set to 64
14:31 01138 Number of temp samples set to 16 and number of irradiance samples set to 8
16:11 01139 Number of temp samples set to 8 and number of irradiance samples set to 4
17:52 01140 Number of temp samples set to 32 and number of irradiance samples set to 16 (default)
27-May     AATSR OFF due to ENVISAT PLSO for all instruments
28-May     ENVISAT recovery started
29-May     AATSR Recovery from PLSO
09:06 01278 AATSR in STANDBY
10:42 01279 Transition to HEATER Mode started
15:22 01282 AATSR in HEATER Mode
18:51 01284 Scan Mirror started
18:53 01284 AATSR in MEASUREMENT Mode
05-Jun 21:18 01385 Payload in SUSPEND due to Level 3 PROTOCOL INTERRUPT

10-Jun

 

 

AATSR recovery started

15:30

01453

AATSR in STANDBY Mode

17:59

01455

Transition to HEATER Mode started

22:33 01458 AATSR in HEATER Mode
11-Jun     AATSR recovery continued
12:48 01466 AATSR in MEASUREMENT Mode
18-Jun     AATSR Low-Gain Mode
07:04 01563 AATSR switched to low-gain mode over desert
15-Jul     Rerun of Cooler Optimisation Procedure S-D-P-3.3
07:45 01950 Cooler commanded to run at fixed amplitude of 7D(hex)
16-Jul     Cooler Optimisation - Cooler at different phase settings
08:55 01965 Cooler Phase commanded to 30(dec)
11:57 01967 Cooler Phase commanded to 31(dec)
14:57 01968 Cooler Phase commanded to 32(dec)
17:57 01970 Cooler Phase commanded to 33(dec)
20:57 01972 Cooler Phase commanded to 29(dec) Default Setting
17-Jul     Cooler Optimisation - Cooler at different balance settings
08:24 01979 Compressor Delta setting commanded 118(dec)
11:24 01981 Compressor Delta setting commanded 120(dec) Default Setting
14:24 01982 Compressor Delta setting commanded 122(dec)
17:24 01984 Compressor Delta setting commanded 128(dec) Default Setting
18-Jul     Cooler returned to amplitude control
09:35 01994 Cooler Compressor and Displacer commanded to zero amplitude
13:45 01996 FPA at 80K
19-Jul     Cooler Optimisation - control temperature at different settings
08:59 02008 Set Point Temperature commanded to 81K
13:58 02011 Set Point Temperature commanded to 84K
18:52 02014 Set Point Temperature commanded to 83K
23:57 02017 Set Point Temperature commanded to 80K Default Setting
22-Jul     FPA Outgassing
09:06 02051 Cooler Compressor and Displacer commanded to zero amplitudes

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Minimize Mission Events - Operational Phase
Year Date Time Orbit Event(s)
OPERATIONAL PHASE BEGINS
2002 23-Jul      

 

 

FPA Outgassing
13:30   02068 1.6µm gain commanded to 337(dec)
24-Jul     FPA Cooldown
09:41 02080 Cooler Compressor amplitude commanded 92(hex), Displacer amplitude commanded to 90(hex)
11:21 02081 Cooler Compressor amplitude commanded B4(hex), Displacer amplitude commanded to 9B(hex)
25-Jul     AATSR-IOR-0014 outgassing completed
09:15 02094 IR Auto-gain Offset Loop activated
04-Sep     Repeat of BB Functional Test AATSR-IOR-0015
11:11 02682 Started
11:19 02682 Complete
08-Sep 06:45 02736 AATSR in HEATER Mode
07:19 02737 AATSR in STANDBY Mode
10-Sep 14:34 02770 AATSR in STANDBY Mode
11-Sep 14:00 02784 AATSR in TR HEATER Mode
20:08 02787 AATSR in HEATER Mode
12-Sep 13:13 02798 AATSR in Measurement Mode
18-Nov     Start of Leonid Meteor Shower Precautions
06:43 03753 AATSR Powered Off
20-Nov     End of Leonid Meteor Shower Precautions
09:05 03783 AATSR in STANDBY mode
10:48 03784 AATSR in TR HEATER mode
15:28 03787 AATSR in HEATER mode
15:40 03787 AATSR in MEASUREMENT mode
18-Dec 02:24 04180 AATSR in HEATER Mode
14:00 04187 AATSR in MEASUREMENT Mode
2003 31-Jan 09:39 04814 AATSR Outgassing Started
03-Feb 17:15 04861 AATSR Outgassing Completed
20-Feb     ENVISAT Command Procedure Failure, all instruments commanded OFF
07:27 05099 AATSR commanded OFF
21-Feb     Envisat OCM out-of-plane Orbit Inclination Maintenance Manoeuvre
04:42 05111 Single Burn (Delta-V 1.6901 m/sec)
    Instrument Recovery
18:36 05120 AATSR commanded to STANDBY
20:12 05121 AATSR commanded to TR HEATER
22-Feb     Instrument Recovery
00:51 05123 AATSR commanded to HEATER
23-Feb     Instrument Recovery
10:26 05143 AATSR commanded to MEASUREMENT
15-Mar     Spacecraft problem, all instruments off
04:21 05426 AATSR off
18-Mar     Instrument Recovery
13:54 05475 AATSR commanded to STANDBY
15:30 05476 AATSR commanded to TR HEATER
20:43 05479 AATSR commanded to HEATER
19-Mar     Instrument Recovery
13:22 05489 AATSR commanded to MEASUREMENT
18-May     Spacecraft Maintenance/Instrument Switchoff
06:25 06343 AATSR commanded to HEATER, then OFF
19-May     Spacecraft Maintenance/Instrument Recovery
11:34 06361 AATSR commanded to STBY
20-May     Spacecraft Maintenance/Instrument Recovery
07:33 06373 AATSR commanded to TR HEATER
12:20 06376 AATSR commanded to HEATER
12:35 06376 AATSR commanded to MEASUREMENT
01-Aug 09:17 07419 AATSR Outgassing Started
05-Aug 10:34 07477 AATSR Outgassing Completed
13-Aug     Reflectance Channels Gains Update
11:00 07592 AATSR commanded
14-Aug     Amendment to 1.6um Channel Gain
15:33 07608 AATSR commanded
05-Sep     AATSR OFF due to ENVISAT PL-SOL for all instruments
07-Sep 09:55 07949 AATSR back in measurement mode
28-Oct 02:55 08675 AATSR into HEATER mode for Envisat Out-of-Plane Manoeuvre
06:30 08677 AATSR returns to MEASUREMENT mode
25-Nov 10:10 09080 AATSR outgassing procedure begins
28-Nov 18:30 09128 AATSR outgassing complete
03-Dec 07:18 09193 Envisat PL-SOL: AATSR and all other instruments OFF
05-Dec 11:41 09224 Envisat restored to nominal with AATSR available
2004 04-Feb 02:40 10092 AATSR unavailable from 02:40 to 08:01 due to orbital correction manoeuvre
16-Apr 08:40 11126 Cooler off, Start Outgassing
19-Apr 12:15 11171 Cooler On, Start Cooldown
17:04 11174 Cooldown Completed
20-Apr 08:09 11183 Auto Gain Offset Loop Restarted
09:23 11183 Visible Channel Gains Updated
21-Apr 07:42 11197 Blackbody Cross-over Test Part I Started
22-Apr

07:13

11211

Blackbody Cross-over Test Part II started
23-Apr

08:17

11226

Auto Gain Offset Loop restarted, Instrument in Nominal Operation
23-Jul

09:00

12529

Outgassing begins as planned in orbit #12529
27-Jul

12586

Cooler On, Start Cooldown

15:39

12590

Cooldown Complete
21-Sep

03:00

13384

AATSR into HEATER mode for OCM

18:00

13393

AATSR into MEASUREMENT mode
19-Nov

10:00

14233

Outgassing begins as planned in orbit #14233
22-Nov

12:06

14277

Cooler On, Start Cooldown

18:10

14281

Cooldown Complete
2005 08-Apr 08:19 16236 Coolers commanded off. Outgassing begins as planned in orbit #16236
11-Apr 08:22 16279 Cooler commanded on
13:16 16282 Cooldown completed by orbit #16282 and by the time given
17-May 07:47 16794 Blackbody cross-over test starts
09:03 16794 Reflectance channels gains update commanded
19-May 08:24 16823 Blackbody cross-over test ends.
22-Aug 08:46 18183 Coolers commanded off. Outgassing begins as planned in orbit #18183
25-Aug 09:13 18226 Coolers commanded on. Cool-down begins
13:55 18229 Cooldown completes
15:25 18230 Outgassing procedure concludes
07-Sep 04:20 18409 AATSR into HEATER mode for OCM
13:40 18415 AATSR into MEASUREMENT mode
16-Dec 09:40 19844 Coolers commanded off. Outgassing begins as planned in orbit #19844
19-Dec 10:29 19887 Coolers commanded on
15:07 19890 Cooldown verified
2006 10-Jan 01:00 20196 AATSR into HEATER mode for ENVISAT OCM
13:00 20204 AATSR into MEASUREMENT mode
28-Mar 00:45 21299 AATSR into HEATER mode for ENVISAT OCM
13:00 21306 AATSR into MEASUREMENT mode
06-Apr 02:09 21428 Envisat down - AATSR OFF
18:39 21438 AATSR ON and back in MEASUREMENT mode
26-Jun 07:20 22591 Blackbody Cross-Over Test starts
08:10 22591 Blackbody Cross-Over Test completed with Auto-Gain/Offset loop restored
04-Aug 01:25 23145 AATSR in Reset/Wait, anomaly under investigation
13:11 23153 AATSR back in measurement mode
07-Sep 16:39 23641 AATSR OFF owing to ENVISAT AOCS STD-A anomaly
10-Sep 15:48 23684 AATSR coolers commanded on
22:02 23687 AATSR in HEATER mode
11-Sep 07:07 23693 AATSR returns to Measurement Mode
28-Nov 07:58 24810 AATSR to OFF following Envisat memory maintenance anomaly
30-Nov 15:07 24843 AATSR returns to Measurement Mode
12-Dec 18:02 25016 AATSR unavailable due to an Envisat LVL3 PROTOCOL ERROR AND INTERRUPT
16-Dec 08:26 25068 AATSR returns to Measurement Mode
2007 22-Jan 23:52 25607 AATSR to HEATER Mode during ENVISAT OCM
23-Jan 12:05 25614 AATSR returns to MEASUREMENT Mode
02-Apr 23:51 26609 AATSR to HEATER Mode during ENVISAT OCM
03-Apr 07:00 26613 AATSR returns to MEASUREMENT Mode
18-May 08:19 27258 Cooler off - AATSR outgassing begins
21-May 06:59 27300 Cooler commanded on
08:28 27301 Cooler commanded to nominal levels
11:50 27303 Cooldown complete
16-Jul 22:05 28111 AATSR to HEATER Mode for ENVISAT OCM
17-Jul 07:11 28116 AATSR returns to MEASUREMENT Mode
24-Sep 12:27 29107 AATSR OFF following payload switch-off due to Service Module Anomaly (Global AOCS Surveillance triggered)
28-Sep 13:40 29165 AATSR Returns to MEASUREMENT mode. Outgassing also completed
13-Nov 07:53 29820 BB cross-over test starts. IR channel auto/gain offset control disabled, +XBB HEATER to OFF, -XBB HEATER to ON
15-Nov 08:30 29849 BB cross-over test ends. Instrument configuration returns fully to nominal
03-Dec 22:00 30115 Into STANDBY mode for the duration of Envisat OCM and maintenance
06-Dec 07:29 30149 Return to MEASUREMENT mode
13-Dec 06:44 30249 Into STANDBY mode for the duration of Envisat memory maintenance activities
14-Dec 08:17 30264 Return to MEASUREMENT mode
2008 16-Jan 16:11 30741 Science data interrupted due to Envisat High Speed Multiplexer (HSM) anomaly. No science data until HSM recovered
17-Jan 09:38 30751 AATSR to HEATER mode for Envisat/HSM recovery procedure
10:35 30752 Envisat/HSM returns to nominal after reset
13:02 30753 AATSR returns to MEASUREMENT mode
11-Feb 23:45 31118 AATSR out of MEASUREMENT mode for Envisat OCM
12-Feb 09:11 31123 AATSR returns to MEASUREMENT mode
21-Apr 22:05 32119 AATSR out of MEASUREMENT mode for Envisat OCM
22-Apr 07:15 32124 AATSR returns to MEASUREMENT mode
23-Jun 07:46 33012 AATSR cooler off - outgassing begins
26-Jun 14:18 33059 AATSR outgassing completed
30-Jun 22:05 33121 AATSR out of MEASUREMENT mode for Envisat OCM
01-Jul 07:00 33126 AATSR returns to MEASUREMENT mode
08-Sep 22:06 34123 AATSR out of MEASUREMENT mode for Envisat OCM
09-Sep 07:00 34128 AATSR returns to MEASUREMENT mode
17-Nov 22:05 35125 AATSR out of MEASUREMENT mode for Envisat OCM
18-Nov 07:00 35130 AATSR returns to MEASUREMENT mode
25-Nov 08:10 35231 AATSR cooler off - outgassing begins
28-Nov 21:33 35282 AATSR outgassing completed. All channels return to nominal
2009 26-Jan 23:44 36128 AATSR out of MEASUREMENT mode for Envisat OCM
27-Jan 06:49 36132 AATSR returns to MEASUREMENT mode
06-Apr 23:44 37130 AATSR out of MEASUREMENT mode for Envisat OCM
07-Apr 06:50 37134 AATSR returns to MEASUREMENT mode
21-Apr 07:53 37335 BB cross-over test starts. IR channel auto/gain offset control disabled, +XBB HEATER to OFF, -XBB HEATER to ON
23-Apr 08:31 37364 BB cross-over test ends. Instrument configuration returns fully to nominal
28-Apr 13:03 37438 Envisat data transmission interrupted due to HSM anomaly. No AATSR science data available
29-Apr 10:14 37451 AATSR out of MEASUREMENT mode for Envisat HSM reset
10:24 37451 Envisat HSM restored to nominal following reset
10:27 37451 AATSR returns to MEASUREMENT mode
26-May 09:32 37837 AATSR cooler off - outgassing begins
29-May 21:09 37887 AATSR outgassing completed. All channels return to nominal
20-Jul 22:07 38632 AATSR out of MEASUREMENT mode for Envisat OCM
21-Jul 06:55 38637 AATSR returns to MEASUREMENT mode
28-Sep 22:07 39634 AATSR out of MEASUREMENT mode for Envisat OCM
29-Sep 07:00 39639 AATSR returns to MEASUREMENT mode
08-Oct 03:15 39765 Envisat PMC switched AATSR into WAIT following two or more TM format errors
17:05 39774 AATSR returns to MEASUREMENT mode
07-Dec 22:04 40636 AATSR out of MEASUREMENT mode for Envisat OCM
08-Dec 07:00 40641 AATSR returns to MEASUREMENT mode
2010 11-Jan 09:00 41129 AATSR cooler to off - outgassing begins
14-Jan 14:07 41175 AATSR outgassing completed. All channels return to nominal
15-Feb 22:04 41638 AATSR out of MEASUREMENT mode for Envisat OCM
16-Feb 07:00 41643 AATSR returns to MEASUREMENT mode
26-Apr 22:08 42640 AATSR out of MEASUREMENT mode for Envisat OCM
27-Apr 07:00 42645 AATSR returns to MEASUREMENT mode
26-May 08:18 43061 BB cross-over test starts. IR channel auto/gain offset control disabled, +XBB HEATER to OFF, -XBB HEATER to ON
28-May 08:55 43090 BB cross-over test ends. Instrument configuration returns fully to nominal
29-Jun 08:49 43548 AATSR cooler to off - outgassing begins
02-Jul 20:32 43598 AATSR outgassing completed. All channels return to nominal.
05-Jul 23:54 43643 AATSR out of MEASUREMENT mode for Envisat OCM
06-Jul 07:00 43647 AATSR returns to MEASUREMENT mode
20-Oct 16:12 45170 AATSR cooler to off - outgassing begins
27-Oct 18:55 45272 AATSR outgassing completed. All channels return to nominal
2011 03-Apr 15:52 47540 Envisat platform anomaly results in Payload/PEB switch-off. AATSR OFF
04-Apr 13:50 47553 AATSR in STANDBY for outgassing, cooler still off
06-Apr 15:42 47583 Outgassing is completed, All channels available
26-Apr 13:58 47869 Envisat HSM Anomaly - AATSR science data acquired but unavailable
28-Apr 09:53 47895 Envisat HSM Anomaly recovered - AATSR science data available again
25-May 10:46 48284 Blackbody cross-over test starts. IR channel auto/gain offset control disabled, +XBB HEATER to OFF, -XBB HEATER to ON
27-May 11:12 48313 Blackbody cross-over test ends. Instrument configuration returns to normal
07-Oct 08:19 50222 Outgassing starts, AATSR cooler to off
10-Oct 14:50 50269 Outgassing is completed. All channels available
14-Oct 01:15 50318 AATSR out of MEASUREMENT mode for Envisat OCM
06:00 50321 AATSR returns to MEASUREMENT mode
2012 23-Jan 07:25 51773 AATSR to STANDBY for Envisat memory anomaly and to start outgassing
26-Jan 13:52 51820 AATSR outgassing is completed. All channels available
29-Feb 22:21 52313 AATSR out of MEASUREMENT mode for planned Envisat OCM maintenance
01-Mar 06:00 52318 AATSR returns to MEASUREMENT mode
08-Apr 12:28 52868 Envisat data transmission anomaly announced. No data via S-, Ka- and X-band
09-Apr 02:12 52876 Final AATSR science data packet processed through EDS-X, acquired 10:56, April 8th, 2012
09-May     End of ENVISAT mission declared

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Minimize Events History - Data Availability

A summary of AATSR data availability and quality for the mission

Figure 1. Bar chart showing the event history of AATSR for the mission lifetime from launch on 01 March 2002 to end of mission (modified by D. L. Smith from fig. 3 in [1]).

 

Key:

Grey = No data generated (AATSR not in MEASUREMENT mode);

Green = Good quality data;

Amber = Data generated but of lower quality;

Red = No data generated due to AATSR anomaly.

 

The summary of AATSR data availability and quality for the mission presented here has been based on the AATSR modes of operation and the instrument event history.

AATSR measurement data were available for more than 95% of the mission, excluding the main commissioning phase up to 23 July 2002.

Reference

[1] Smith. D. L. (2012) ENVISAT AATSR Instrument Performance - End of Mission Report, PO-RP-RAL-AT-0621, Issue 1.0.

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Minimize Instrument Modes

A summary of the modes in which AATSR was placed during the mission

Figure 2. Bar chart showing the AATSR modes for the mission lifetime from launch on 01 March 2002 to end of mission in 2012 (modified by D. L. Smith from fig. 2 in [1]).

 

Key:

Grey = all units off;

Orange = AATSR in STANDBY or WAIT;

Amber = AATSR in HEATER or transition to HEATER;

Green = AATSR in MEASUREMENT mode;

Cyan = outgassing while AATSR in MEASUREMENT mode;

Blue = blackbody cross-over while AATSR in MEASUREMENT mode;

Red = AATSR in STANDBY/REFUSE or WAIT due to instrument anomaly.

 

Note that the days on which the instrument was in a certain mode are indicated and not necessarily the duration. For example, to cover an OCM, AATSR will have been in HEATER mode for only a few hours and returned to MEASUREMENT at the end of the manoeuvre.

In the event of a platform anomaly AATSR was commanded to OFF or STANDBY by platform command.

In the event of an instrument anomaly, AATSR would enter STANDBY/REFUSE autonomously or be commanded to RESET/WAIT by platform command.

Reference

[1] Smith. D. L. (2012) ENVISAT AATSR Instrument Performance – End of Mission Report, PO-RP-RAL-AT-0621, Issue 1.0.

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Minimize Non-Nominal Data Periods

These tables list periods during which AATSR data quality was affected (see also Housekeeping Activities above).

For full information on the events listed below, see the AATSR Performance Report.

Table 3. The Envisat Fine Pointing Mode event during which AATSR products were generated

Start time End time Orbit start Orbit end
28/10/2003 06:26 28/10/2003 13:10 08677 08681

Table 4. Commissioning Phase data  available to users after the Third Reprocessing of AATSR

Start time End time AATSR product name orbit start AATSR product name orbit end
20/05/2002 09:52 22/07/2002 23:42 01149 02058

Table 5. Envisat mission extension period affecting AATSR products

Start time End time Orbit start Orbit end
27/10/2010 18:55 02/11/2010 10:25 45272 45353

 

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