Calibration

Sentinel-3 OLCI Technical Guide - Calibration

List of all OLCI Radiometric Calibration Sequences

Phase S/C Year Instrument Type Date Time* Orb
(rel)		 Orb
(abs)		 PSO
(centre)		 Req ID Planned
via		 Operation Uplink Execution
time
Routine S3A 2019 OLCI S01 11-Jan 02:30:46 116 15105 288.192 RFRC _0043 v3 MPF Routine 24-Dec 02:30:46
Routine S3A 2019 OLCI S01 25-Jan 13:13:08 322 15311 284.761 RFRC _0044 MPF Routine 11-Jan 13:13:10
Routine S3A 2019 OLCI S05 25-Jan 14:54:07 323 15312 284.741 RFRC _0044 MPF Routine 11-Jan 14:54:09
Routine S3A 2019 OLCI S01 14-Feb 16:14:22 224 15598 277.483 RFRC _0045 MPF Routine 08-Feb 16:14:25
Routine S3A 2019 OLCI S01 27-Feb 13:54:23 23 15782 271.869 RFRC _0047 MPF Routine 22-Feb 13:54:24
Routine S3A 2019 OLCI S09 05-Mar 09:04:16 106 15865 150.07* RFRC _0046 SOR -OPS Routine 01-Mar 09:04:12
Routine S3A 2019 OLCI S02 05-Mar
 		 11:16:29 107 15866 269.199 RFRC _0046 SOR -OPS Routine 01-Mar 11:16:32
Routine S3A 2019 OLCI S03 05-Mar
 		 12:57:28 108 15867 269.168 RFRC _0046 SOR -OPS Routine 01-Mar 12:57:31
Routine S3A 2019 OLCI S01 12-Mar 14:56:16 209 15968 265.945 RFRC _0048 MPF Routine 08-Mar 14:56:17
Routine S3A 2019 OLCI S01 22-Mar 22:20:01 356 16115 261.327 RFRC _0049 MPF Routine 08-Mar 22:20:09
Routine S3A 2019 OLCI S01 01-Apr 01:07:21 101 16245 257.411 RFRC _0050 SOR -OPS Routine 29-Mar 01:07:21
Routine S3A 2019 OLCI S05 01-Apr 02:48:20 102 16246 257.382 RFRC _0050 SOR - OPS Routine 29-Mar 02:48:20
Routine S3A 2019 OLCI S01 09-Apr 04:20:57 217 16361 254.1 RFRC _0050 SOR - OPS Routine 29-Mar 04:20:57
Routine S3A 2019 OLCI S01 13-Apr 16:03:38 281 16425 252.361 RFRC _0050 MPF Routine 05-Apr 16:03:38
Routine S3A 2019 OLCI S01 21-Apr 05:49:28 4 16533 249.587 RFRC _0051 MPF Routine 05-Apr 05:49:28
Routine S3A 2019 OLCI S01 30-Apr 23:45:46 143 16672 246.336 RFRC _0051 MPF Routine 19-Apr 23:45:46
Routine S3A 2019 OLCI S01 12-May 15:08:41 309 16838 242.989 RFRC _0052 MPF Routine 03-May 15:08:41
Routine S3A 2019 OLCI S01 28-May 04:46:50 146 17060 239.564 RFRC _0053 MPF Routine 17-May 04:46:50
Routine S3A 2019 OLCI S01 18-Jun 12:26:11 65 17364 237.177 RFRC _0055 MPF Routine 31-May 12:26:11
Routine S3A 2019 OLCI S09 21-Jun 09:04:17 106 17405 150.07* RFRC _0046 SOR - OPS Routine 18-Jun 09:04:19
Routine S3A 2019 OLCI S02 21-Jun 11:07:27 107 17406 237.083 RFRC _0046 MPF Routine 14-Jun 11:07:37
Routine S3A 2019 OLCI S03 21-Jun 12:48:26 108 17407 237.082 RFRC _0046 MPF Routine 14-Jun 12:48:36
Routine S3A 2019 OLCI S01 06-Jul 23:05:54 382 17627 237.614 RFRC _0056 MPF Routine 28-Jun 23:05:54
Routine S3A 2019 OLCI S01 23-Jul 00:32:36 172 17856 240.014 RFRC _0056 MPF Routine 12-Jul 00:32:35
Routine S3A 2019 OLCI S05 23-Jul 02:13:35 173 17857 240.03 RFRC _0056 MPF Routine 12-Jul 02:13:35
Routine S3A 2019 OLCI S01 08-Aug 23:52:41 29 18098 244.492 RFRC _0057 MPF Routine 26-Jul 23:52:40
Routine S3A 2019 OLCI S01 28-Aug 15:11:01 309 18378 251.701 RFRC _0058 MPF Routine 23-Aug 15:11:01
Routine S3A 2019 OLCI S01 10-Sep 04:29:09 103 18557 257.067 RFRC _0059 MPF Routine 23-Aug 04:29:14

 

 

Phase S/C Year Instrument Type Date Time* Orb
(rel)		 Orb
(abs)		 PSO
(centre)		 Req ID Planned
via		 Operation Uplink Execution
time
Routine S3B 2019 OLCI S01 11-Jan 10:16:10 363 3716 288.134 RFRC _0043v3 MPF Routine 04-Jan 10:16:11
Routine S3B 2019 OLCI S01 26-Jan 05:23:26 189 3927 284.561 RFRC _0044 MPF Routine 18-Jan 05:23:28
Routine S3B 2019 OLCI S05 26-Jan 07:04:25 190 3928 284.539 RFRC _0044 MPF Routine 18-Jan 07:04:27
Routine S3B 2019 OLCI S01 14-Feb 03:47:59 74 4197 277.697 RFRC _0045 MPF Routine 01-Feb 03:48:02
Routine S3B 2019 OLCI S01 27-Feb 01:27:58 258 4381 271.709 RFRC _0047 SOR - OPS Routine 20-Feb 01:27:58
Routine S3B 2019 OLCI S01 12-Mar 04:10:55 60 4568 265.757 RFRC _0048 SOR - OPS Routine 08-Mar 04:10:54
Routine S3B 2019 OLCI S09 15-Mar 09:05:25 106 4614 150.07* RFRC _0046 SOR - OPS Routine 08-Mar 09:05:56
Routine S3B 2019 OLCI S02 15-Mar 11:17:04 107 4615 264.654 RFRC _0046 MPF Routine 01-Mar 11:16:53
Routine S3B 2019 OLCI S03 15-Mar 12:58:03 108 4616 264.623 RFRC _0046 MPF Routine 01-Mar 12:57:51
Routine S3B 2019 OLCI S01 22-Mar 11:34:42 207 4715 261.132 RFRC _0049 SOR - OPS Routine 15-Mar 11:34:45
Routine S3B 2019 OLCI S01 31-Mar 17:43:54 339 4847 257.149 RFRC _0050 SOR - OPS Routine 29-Mar 17:43:53
Routine S3B 2019 OLCI S01 31-Mar 19:24:52 340 4848 257.118 RFRC _0050 SOR - OPS Routine 29-Mar 19:24:52
Routine S3B 2019 OLCI S01 08-Apr 20:57:27 70 4963 253.827 RFRC _0050 MPF Routine 29-Mar 20:57:27
Routine S3B 2019 OLCI S01 13-Apr 08:40:08 134 5027 252.084 RFRC _0050 MPF Routine 29-Mar 08:40:08
Routine S3B 2019 OLCI S01 20-Apr 22:25:57 242 5135 249.301 RFRC _0051 MPF Routine 12-Apr 22:25:57
Routine S3B 2019 OLCI S01 30-Apr 16:22:13 381 5274 246.042 RFRC _0051 MPF Routine 26-Apr 16:22:13
Routine S3B 2019 OLCI S01 12-May 06:04:07 161 5439 242.696 RFRC _0052 MPF Routine 26-Apr 06:04:07
Routine S3B 2019 OLCI S01 27-May 11:17:18 378 5656 239.3 RFRC _0053 MPF Routine 10-May 11:17:17
Routine S3B 2019 OLCI S01 18-Jun 23:33:19 314 5977 236.766 RFRC _0055 MPF Routine 07-Jun 23:33:21
Routine S3B 2019 OLCI S09 01-Jul 09:05:49 106 6154 150.07* RFRC _0046 SOR - OPS Routine 28-Jun 09:05:51
Routine S3B 2019 OLCI S02 01-Jul 11:09:21 107 6155 237.225 RFRC _0046 SOR - OPS Routine 28-Jun 11:09:05
Routine S3B 2019 OLCI S03 01-Jul 12:50:20 108 6156 237.229 RFRC _0046 SOR - OPS Routine 28-Jun 12:50:04
Routine S3B 2019 OLCI S01 07-Jul 08:32:08 191 6239 237.258 RFRC _0056 SOR - OPS Routine 28-Jun 08:32:08
Routine S3B 2019 OLCI S01 23-Jul 11:39:51 36 6469 239.718 RFRC _0056 MPF Routine 05-Jul 11:39:51
Routine S3B 2019 OLCI S01 23-Jul 13:20:51 37 6470 239.734 RFRC _0056 MPF Routine 05-Jul 13:20:50
Routine S3B 2019 OLCI S01 09-Aug 12:40:59 279 6712 244.27 RFRC _0057 MPF Routine 02-Aug 12:40:58
Routine S3B 2019 OLCI S01 29-Aug 17:27:20 182 7000 251.759 RFRC _0058 MPF Routine 16-Aug 17:27:20
Routine S3B 2019 OLCI S01 12-Sep 08:00:25 376 7194 257.625 RFRC _0059 MPF Routine 30-Aug 08:00:27

 

 

Absolute Gain Coefficients

The figures below display the time evolution of the cross-track averaged gain, for each module, as a function of time. It shows that if a significant evolution occurred during the early mission, the trends tend to stabilize. In particular all calibrations since beginning of August 2016 provide very stable results, within 0.5% for all bands.

 

Sentinel-3A OLCI Gain Coefficients

 

Sentinel-3B OLCI Gain Coefficients

 

SNR Assessment

The Signal to Noise Radiot (SNR) is computed for all Radiometric Calibration (RC) data as a function of band number. It is computed first at Calibration signal level then downscaled to the "typical ocean" level as specified in the Mission Requirements Document (MRD). It has been verified with a different methodology using Earth Observation data over oligotrophic waters (best matching the MRD requirement radiance level) that the SNR estimates from RC are reliable. All calibrations except the first one (orbit 183) are present with the colours corresponding to the orbit number (see legend in the figure). The SNR is very stable with time: the curves for all orbits are almost superimposed. The dashed curve is the MRD requirement.

 

Sentinel-3A OLCI SNR

 

Sentinel-3B OLCI SNR

Signal to Noise ratio as a function of the spectral band for the 5 cameras

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