Sentinel-3 Synergy Anomalies and Events - Technical Guides - Sentinel Online
Since the Sentinel-3 mission entered operations, the satellites have occasionally experienced anomalies or events that impact the quality and availability of the mission's data.
Download the anomalies and events report to see the details of each event affecting Synergy products. A glossary of terms is also available.
The dates of the events are summarised in the following yearly calendars. For each calendar day, if an event occurred:
- Tagged with 'A' - events affecting only Sentinel-3A
- Tagged with 'B' - events affecting only Sentinel-3B
- Nothing is displayed when it affects Sentinel-3A and Sentinel-3B
- If two events occurred, the two colours are displayed in the cell
Please consult the Product Notices related to each instrument.
Key:
| Data gap |
| Degradation or minor anomaly on product |
| Major anomaly |
| Data gap and degradation or minor anomaly on product |
| Data gap and major anomaly on product |
| OLCI or SLSTR anomaly which impacts SYN products |
| OLCI or SLSTR anomaly which impacts SYN products and data gap |
| OLCI or SLSTR anomaly which impacts SYN products and minor anomaly |
| No event |
2021
| Month | Day | ||||||||||||||||||||||||||||||
| January | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 B |
14 | 15 | 16 | 17 | 18 | 19 B |
20 A |
21 A |
22 | 23 B |
24 | 25 A|B |
26 | 27 A |
28 | 29 | 30 | 31 |
| February | 01 | 02 | 03 B |
04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 A |
12 | 13 | 14 B |
15 | 16 A |
17 A |
18 | 19 A |
20 | 21 A |
22 | 23 | 24 B |
25 | 26 | 27 | 28 A |
- | - | - |
| March | 01 A |
02 | 03 | 04 | 05 A |
06 | 07 A |
08 A |
09 | 10 A |
11 | 12 | 13 | 14 A |
15 B |
16 | 17 A |
18 | 19 | 20 A |
21 A |
22 | 23 | 24 | 25 | 26 | 27 A |
28 | 29 B |
30 A |
31 |
| April | 01 | 02 B |
03 | 04 | 05 | 06 A |
07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 B |
15 A |
16 | 17 | 18 | 19 A |
20 A |
21 A |
22 | 23 A |
24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| May | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 B |
10 A|B |
11 A |
12 | 13 | 14 | 15 | 16 | 17 | 18 A |
19 A|B |
20 | 21 | 22 | 23 A |
24 | 25 | 26 | 27 | 28 | 29 B |
30 | 31 |
| June | 01 A |
02 A|B |
03 A|B |
04 A|B |
05 A|B |
06 A|B |
07 A|B |
08 A|B |
09 A|B |
10 A|B |
11 | 12 | 13 | 14 | 15 A|B |
16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 A |
24 | 25 | 26 A |
27 B |
28 A |
29 | 30 | - |
| July | 01 | 02 A |
03 | 04 | 05 | 06 A |
07 | 08 | 09 A |
10 | 11 | 12 A |
13 A |
14 A|B |
15 A|B |
16 A |
17 A |
18 | 19 A |
20 | 21 | 22 | 23 | 24 | 25 | 26 B |
27 | 28 | 29 | 30 | 31 |
| August | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 A |
11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 B |
20 A |
21 | 22 A |
23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| September | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 A |
11 | 12 | 13 | 14 A |
15 | 16 A |
17 | 18 A|B |
19 A |
20 | 21 | 22 B |
23 B |
24 | 25 | 26 | 27 | 28 A |
29 A |
30 | - |
| October | 01 B |
02 | 03 | 04 | 05 | 06 | 07 A |
08 | 09 B |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 B |
21 | 22 A |
23 | 24 | 25 | 26 | 27 B |
28 | 29 | 30 | 31 A |
| November | 01 A|B |
02 A |
03 B |
04 A|B |
05 | 06 | 07 | 08 | 09 A |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 B |
19 | 20 | 21 | 22 A |
23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| December | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
2020
| Month | Day | ||||||||||||||||||||||||||||||
| January | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 B |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 A |
19 | 20 | 21 B |
22 | 23 A |
24 | 25 | 26 | 27 | 28 B |
29 | 30 | 31 |
| February | 01 | 02 B |
03 A |
04 A |
05 A|B |
06 A |
07 A |
08 A |
09 A |
10 A |
11 A |
12 | 13 | 14 | 15 | 16 | 17 A |
18 | 19 | 20 A |
21 | 22 | 23 B |
24 A |
25 | 26 | 27 A|B |
28 A|B |
29 | - | - |
| March | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 A |
12 | 13 | 14 | 15 | 16 A |
17 | 18 | 19 | 20 | 21 | 22 | 23 A |
24 B |
25 | 26 | 27 | 28 | 29 | 30 | 31 |
| April | 01 | 02 | 03 | 04 | 05 A |
06 B |
07 | 08 B |
09 | 10 A |
11 A |
12 | 13 B |
14 A|B |
15 | 16 | 17 | 18 | 19 B |
20 | 21 | 22 B |
23 | 24 B |
25 | 26 | 27 | 28 | 29 | 30 A |
- |
| May | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 A |
11 | 12 | 13 A |
14 A |
15 A |
16 A |
17 A |
18 A |
19 A |
20 A|B |
21 A |
22 A |
23 | 24 | 25 | 26 | 27 B |
28 | 29 | 30 | 31 |
| June | 01 | 02 | 03 B |
04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 A |
12 | 13 | 14 | 15 A |
16 | 17 A |
18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| July | 01 | 02 | 03 | 04 A |
05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 B |
15 | 16 | 17 | 18 | 19 B |
20 | 21 | 22 | 23 B |
24 B |
25 A|B |
26 | 27 B |
28 | 29 B |
30 | 31 |
| August | 01 | 02 A |
03 | 04 A |
05 B |
06 | 07 | 08 | 09 B |
10 A |
11 | 12 B |
13 | 14 | 15 B |
16 | 17 A |
18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 A |
| September | 01 A|B |
02 A |
03 | 04 | 05 A |
06 | 07 | 08 | 09 | 10 A |
11 | 12 | 13 | 14 | 15 A|B |
16 A|B |
17 | 18 | 19 | 20 | 21 B |
22 A |
23 | 24 | 25 A |
26 | 27 | 28 A |
29 | 30 | - |
| October | 01 | 02 | 03 | 04 B |
05 | 06 A |
07 A|B |
08 | 09 | 10 A |
11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 B |
19 | 20 B |
21 B |
22 B |
23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| November | 01 A |
02 | 03 | 04 | 05 B |
06 | 07 | 08 A|B |
09 A |
10 A |
11 B |
12 B |
13 B |
14 | 15 | 16 | 17 A |
18 | 19 | 20 | 21 | 22 | 23 A |
24 | 25 | 26 | 27 B |
28 | 29 | 30 | - |
| December | 01 | 02 A |
03 | 04 | 05 A |
06 A |
07 | 08 | 09 | 10 | 11 | 12 A |
13 | 14 | 15 | 16 A|B |
17 | 18 | 19 | 20 | 21 | 22 B |
23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
2019
| Month | Day | ||||||||||||||||||||||||||||||
| January | 01 A |
02 | 03 | 04 A|B |
05 A|B |
06 B |
07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 A|B |
15 | 16 | 17 | 18 | 19 | 20 | 21 A |
22 | 23 A |
24 | 25 | 26 | 27 | 28 | 29 A |
30 | 31 |
| February | 01 | 02 | 03 | 04 | 05 | 06 B |
07 | 08 | 09 | 10 | 11 | 12 | 13 B |
14 | 15 B |
16 | 17 B |
18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 A |
28 | - | - | - |
| March | 01 | 02 | 03 | 04 | 05 A |
06 | 07 B |
08 | 09 B |
10 A |
11 | 12 | 13 B |
14 | 15 B |
16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| April | 01 | 02 | 03 | 04 | 05 A |
06 | 07 | 08 B |
09 | 10 A |
11 B |
12 B |
13 B |
14 B |
15 B |
16 B |
17 A|B |
18 | 19 B |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 A |
30 | - |
| May | 01 | 02 B |
03 | 04 | 05 | 06 | 07 | 08 A |
09 A |
10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 A |
21 A |
22 A |
23 A |
24 A|B |
25 A |
26 A |
27 | 28 A |
29 A|B |
30 A|B |
31 A|B |
| June | 01 A|B |
02 A|B |
03 | 04 | 05 B |
06 | 07 | 08 | 09 A |
10 | 11 | 12 | 13 A|B |
14 | 15 | 16 | 17 | 18 | 19 B |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| July | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 A |
09 | 10 | 11 | 12 | 13 A |
14 | 15 | 16 A |
17 B |
18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 B |
30 | 31 |
| August | 01 | 02 | 03 | 04 | 05 | 06 | 07 A|B |
08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 B |
24 | 25 | 26 | 27 | 28 A|B |
29 | 30 | 31 |
| September | 01 B |
02 | 03 B |
04 B |
05 A |
06 A |
07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 B |
20 B |
21 B |
22 B |
23 B |
24 B |
25 B |
26 B |
27 | 28 | 29 | 30 B |
- |
| October | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 B |
11 | 12 A |
13 | 14 | 15 A |
16 B |
17 | 18 A |
19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 A |
31 B |
| November | 01 | 02 | 03 | 04 A |
05 | 06 | 07 | 08 | 09 | 10 | 11 A|B |
12 A |
13 | 14 | 15 B |
16 | 17 | 18 B |
19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 A |
28 | 29 | 30 | - |
| December | 01 | 02 A |
03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 A |
12 | 13 | 14 | 15 | 16 | 17 | 18 B |
19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
2018
Mile stone dates
- Sentinel-3B launch: 25 April 2018
- Drift phase: 25 April to 5 June 2018
- Sentinel-3B start of tandem phase: 6 June 2018
- Tandem phase: 6 June to 15 October 2018
- Sentinel-3B start of second drift phase: 16 October 2018
- Drift phase: 16 October to 22 November 2018
- Sentinel-3B definitive orbit: 23 November 2018
| Month | Day | ||||||||||||||||||||||||||||||
| January | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| February | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | - | - | - |
| March | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| April | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| May | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| June | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| July | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| August | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| September | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
| October | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 B |
17 B |
18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 B |
27 | 28 | 29 | 30 | 31 |
| November | 01 | 02 B |
03 | 04 B |
05 | 06 | 07 | 08 | 09 | 10 B |
11 | 12 | 13 A|B |
14 | 15 | 16 | 17 A|B |
18 | 19 | 20 B |
21 | 22 A|B |
23 A|B |
24 | 25 | 26 | 27 B |
28 B |
29 | 30 | - |
| December | 01 A|B |
02 | 03 | 04 | 05 | 06 B |
07 | 08 | 09 | 10 | 11 A |
12 B |
13 B |
14 | 15 A |
16 | 17 | 18 | 19 A |
20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 A |
29 | 30 | 31 |