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Black Sea (M)SLA - (Map of) Sea Level Anomalies & geostrophic velocity anomalies

Black Sea

Types of dataset: Ssalto/Duacs multimission altimeter products
Contents: multimission sea surface heights computed with respect to a mean profile, along-track or gridded (1/8°x1/8° on a regular grid).
Use: regional studies; ocean variability (mesoscale circulation, seasonal variation...), including operational oceanography (near-real time products)
Description: regional product resulting from specific processes, available in delayed time and in near-real time.
For gridded merged data, a formal mapping error file is also available, with geostrophic velocity anomalies.
Geographic coverage: Black Sea (40.5°N-47°N, 27°E-42°E)

Format: NetCDF
Tools :

DT-(M)SLA

Description: this delayed time product is available in two versions:

  • "Ref" (Reference) series: homogeneous datasets based on two satellites (Jason-2 / Envisat  or Jason-1 / Envisat or Topex/Poseidon / ERS) with the same groundtrack. Sampling is stable in time.
  • "Upd" (Updated) series: up-to-date datasets with up to four satellites at a given time (Jason-2 / Jason-1 / Envisat from 2009 or between October 2002 and September 2005, the association Jason-1 / Topex/Poseidon / Envisat / GFO). Sampling and Long Wavelength Errors determination are improved, but quality of the series is not homogeneous.

Copyright : 2008-ongoing CLS - Cnes

DT-(M)SLA "Ref"

Satellite

Type

Distribution media

Frequency

Data period

File weight

Jason-2

along-track

FTP

6 months

Jan. 2009 - ongoing

 6 KB per file (zipped)

Jason-1

along-track

FTP

6 months

August 2002 - ongoing

115 KB per file (zipped)

Envisat

along-track

FTP

6 months 

June 2003 - ongoing

130 KB per file (zipped)

T/P

along-track

FTP

6 months 

September 1992 - October 2005

100 KB per file (zipped)

ERS-1

along-track

FTP

6 months 

October 1992 - May 1995

130 KB per file (zipped)

ERS-2

along-track

FTP

6 months 

May 1995 - June 2003

130 KB per file (zipped)

Merged

gridded

FTP:
sea surface heights
geostrophic currents
formal mapping error

6 months 

October 1992 - ongoing

65 KB per file (zipped)

DT-(M)SLA "Upd"

Satellite

Type

Distribution media

Frequency

Data period

File weight

Jason-2

along-track

FTP

6 months

Jan. 2009 - ongoing

6 KB per file (zipped)

Jason-1

along-track

FTP
FTP (new orbit)

6 months

August 2002 - Jan. 2009
Feb. 2009 - ongoing 

115 KB per file (zipped)

Envisat

along-track

FTP

6 months 

June 2003 - ongoing

130 KB per file (zipped)

GFO

along-track

FTP

6 months 

January 2000 - October 2008

140 KB per file (zipped)

T/P

along-track

FTP

FTP (new orbit)

6 months 

April1993 - August 2002
September 2002 - October 2005

100 KB per file (zipped)

ERS-1

along-track

FTP

6 months 

October 1992 - May 1995

130 KB per file (zipped)

ERS-2

along-track

FTP

6 months 

May 1995 - June 2003

130 KB per file (zipped)

Merged

gridded

FTP
sea surface heights
geostrophic currents
formal mapping error

6 months 

October 1992 - ongoing

65 KB per file (zipped)

RT & NRT-(M)SLA

Description : the NRT "historical data" are available one month after the date of measurement. The delivery delay for the RT and NRT data is lower: between a 6-day delay and a 0-day delay.
Condition of access :
The NRT "historical data" are freely available via the links below. For RT and NRT data less for one month, see Access to Ssalto/Duacs data .
Data period
: within a few months at most, from the latest update of the DT products to today.
Copyright : 2009-ongoing CLS-Cnes.

Satellite

Type

Distribution media

Frequency

Delivery delay

Data period

File weight

Jason-2

along-track

FTP authenticated

FTP anonymous

Daily

few hours

30 days 

few months

60 KB per file (zipped)

gridded

FTP authenticated

FTP anonymous

Opendap

few hours

30 days

Jason-1

along-track

FTP authenticated

FTP anonymous

Daily

few hours

30 days

few months

60 KB per file (zipped)

gridded

FTP authenticated

FTP anonymous

Opendap

few hours

30 days

Envisat

along-track

FTP authenticated

FTP anonymous

Daily

few hours

30 days

few months

60 KB per file (zipped)

gridded

FTP authenticated

FTP anonymous

Opendap

few hours

30 days

Merged

gridded

FTP authenticated 

Daily

few hours

few months

100 KB per file (zipped)

gridded

FTP anonymous:
sea surface heights
geostrophic currents
formal mapping error

Opendap

30 days