Status on cycle 127 Saral
Cycle lasts from 2019-02-04 16:43:53 to 2019-03-11 16:51:30.
Processing on SSALTO on 8th April (with L1 library=V4.7, L2 library=V5.5p2, Processing Pilot=V5-2p2).
Quality assement report is available here.
Particular events on cycle
During this cycle HD mode was activated (during 1s) at the following:
- 12/02/2019 at 22:16:47
- 13/02/2019 at 10:40:08
- 28/02/2019 at 22:17:26
- 01/03/2019 at 10:40:46.
Acquisition/tracking modes
During cycle 127 only one acquisition/tracking mode was used:
- Passes 1 to 1002 : DIODE acquisition / median tracking
Missing ocean data
Some passes have a large number of missing measurements. Are presented here the passes with more than 10% of missing data :
| Pass number | 1 | 2 | 3 | 4 | 5 | 6-23 | 24 | 34 | 35 | 36-46 | 66 | 67 | 68 | 69 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % missing measurements | 12,13 | 71,18 | 19,75 | 89,15 | 28,08 | 100 | 31,44 | 22,49 | 45,19 | 100 | 14,47 | 20,94 | 58,57 | 98,80 |
| Pass number | 70 | 71 | 94 | 95 | 111 | 113 | 114 | 115 | 116 | 117 | 152 | 239 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % missing measurements | 100 | 58,73 | 12,93 | 10,94 | 10,00 | 17,92 | 48,26 | 31,48 | 38,19 | 47,38 | 10,37 | 100 |
| Pass number | 259 | 260 | 261 | 262 | 263 | 264 | 265 | 266-270 | 271 | 296 | 382 | 407 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % missing measurements | 12,76 | 12,48 | 24,53 | 31,53 | 44,10 | 53,80 | 68,00 | 100 | 48,55 | 13,13 | 14,14 | 12,92 |
| Pass number | 409 | 410 | 451 | 453 | 479 |
|---|---|---|---|---|---|
| % missing measurements | 13,58 | 15,09 | 14,56 | 12,45 | 10,13 |
The overall percentage of ocean missing measurements (latitude < 50 deg, bathy < -1000m) on this cycle: 5.62% (usually between 0.06% and 0.08%).
Calval output
During this cycle mispointing has reached levels that has not been observed since the pre-SHM period (September 2014).
These levels of mispointing are due to attitude deviation, and explains the higher percentage of missing measurements.
Data quality is severely impacted by these events, so that more than 40% of the data is invalid because of mispointing. (see attached figures).
Users are advised to use data with off_nadir_angle < 0.09deg².
Performances
Xover rms = 5.29 cm (latitude < 50 deg, bathy < -1000m , low variability areas , excluding edited data)
SLA rms = 10.05 cm
Conclusion
Cycle certified for distribution from CALVAL point of view, with a restriction : use data with off_nadir_angle < 0.09deg²
Données
- Guide des produits.
Produits .- Accès aux données .
- Outils .
- Information sur les produits .
- CALVAL .
- Overview.
- Latest results .
- Missions performances .
- Annual reports .
- Cyclic reports .
- CFOSAT SWIM.
- Jason-3 GDR.
- Saral GDR .
- Saral/Altika Cycle 127 GDR release.
- Jason-2 GDR.
- Jason-1 GDR.
- Envisat GDR.
- Topex-Poseidon GDR.
- In-situ .
- Wind/Waves.
- Cryosphere.
- Orbit .
- Syntheses of past reports .
- Operational information .
