rads_global_nrt_sla_20181014_20181015_001_800.png

Please acknowledge "NOAA CoastWatch/OceanWatch" when you use data from our site and cite the particular dataset DOI as appropriate.

rads_global_nrt_sla_20181014_20181015_001_800.png

The NOAA Laboratory for Satellite Altimetry's (LSA) sea surface height team produces 0.25-degree longitude/latitude Level-3 sea level anomaly (SLA) daily datasets by applying optimal interpolation to along-track satellite observations over the global ocean from a constellation of radar altimeter missions. Theses grids are produced with near-real time (3-5 hour latency) data.

The altimetry data are from RADS (http://rads.tudelft.nl/rads/rads.shtml), the Radar Altimetry Database System, first developed at Delft University of Technology, now also at the NOAA and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT). The RADS data for each mission is updated with state of the art corrections for tides, atmospheric path delay, etc. Because they are all computed consistently between the various missions, this avoids the possibility of introducing biases and drifts because of the different implementation of the various corrections by different agencies. The goals of RADS are to provide a homogenous dataset of sea level anomalies, wave heights, and wind speeds, along with database selection and analysis tools.

KeyDescription
Platform/Sensor

Jason-2; Jason-3; Sentinel-3A; CryoSat-2; SARAL

Measurement/Products

Earth Science >Oceans > Surface Sea Surface Height

DOI

n/a

Short Name

RADS-NRT-SLA-Daily-L3

Sample Filename

1-day: rads_global_nrt_sla_20170313_20170314_000.nc

Dataset Type

n/a

Processing Level

L3

Spactial Coverage

Global
180W-180E
90N-90S

Temporal Coverage

1 January 2017 - current

Latency

12 hours

Resolution

0.25x0.25 longitude/latitude degree

Projection

n/a

Swath Width

n/a

Sample Frequency

n/a

Temporal Repeat

Jason-2/Jason-3: 9.9156 days;
Sentinel-3A: 27 days;
CryoSat-2: 369 days;
SARAL: ~35 days

Orbital Period

Jason-2/Jason-3: 112.4 minutes;
Sentinel-3A: 101 minutes;
CryoSat-2: 100 minutes;
SARAL: 100.6 minutes

Orbit

n/a

Data Provider

Creator: Eric Leuliette, NOAA/NESDIS/STAR/SOCD/LSA

Formats

n/a

Keywords

Jason-2; Jason-3; Sentinel-3A; CryoSat-2; SARAL; sea surface height; sea level anomalies

Keywords (Beta)
Documentation: 

(♦ - non-government website)