NO JAVASCRIPT

This website requires JavaScript to function properly / Ce site a besoin de JavaScript pour fonctionner correctement

Aviso+
Data
CALVAL
Missions performances
Cyclic reports
Saral GDR
Saral/Altika Cycle 127 GDR release

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

Data

Products guide.
Products .
Data access .
Tools .
Product information .
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 .

Customizable homepage

This home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.