MEaSUREs Gridded Sea Surface Height Anomalies Version 1812

MEaSUREs Gridded Sea Surface Height Anomalies Version 1812
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DOI10.5067/SLREF-CDRV2
Short NameSEA_SURFACE_HEIGHT_ALT_GRIDS_L4_2SATS_5DAY_6THDEG_V_JPL1812
DescriptionThese are gridded Sea Surface Height Anomalies (SSHA) above a mean sea surface, on 1/6th degree grid every 5 days. It contains the fully corrected heights, but delayed 3 months. If you require data sooner there is an interim dataset available, but with slightly lower accuracy at http://dx.doi.org/10.5067/SLINT-CDRV2. The gridded data are derived from the SSHA data of TOPEX/Poseidon, Jason-1, Jason-2 and Jason-3 as reference data from the level 2 swath data found at https://podaac.jpl.nasa.gov/dataset/MERGED_TP_J1_OSTM_OST_CYCLES_V42, plus ERS-1, ERS-2, Envisat, SARAL-AltiKa, CRyosat-2, depending on the date, from the RADS database. The gridding is done by the kriging method. The date given in the data is the center of the 5 day window.
Version1812
Dataset TypeOPEN
MeasurementOCEANS > SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT > NONE
Processing Level4
CoverageRegion: Global
Northernmost Latitude: 90 degrees
Southernmost Latitude: -90 degrees
Westernmost Longitude: 0 degrees
Easternmost Longitude: 360 degrees
Time Span: 1992-Oct-01 to Present
ResolutionSpatial Resolution: 0.17 degrees (Latitude) x 0.17 degrees (Longitude)
Temporal Resolution: 5 Day
ProjectionType:
Detail:
Ellipsoid:
Latency hours
Platform/Sensor
JASON-1
Platform
Name: JASON-1 (JASON-1)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
POSEIDON-2
SENSOR
Name: JASON-1 RADAR ALTIMETER (POSEIDON-2)
Swath Width: - km
Description: The Poseidon-2 altimeter, operating at 13.575 GHz (Ku band) and 5.3 GHz (C band), is the primary sensor for the JASON-1 mission. The measurements made at the two frequencies are combined to obtain measurements of the altimeter range, wind speed, significant wave height, and the ionospheric correction. The Poseidon-2 package consists of dual redundant altimeter units each of which has low mass and low power consumption.

JASON-1
Platform
Name: JASON-1 (JASON-1)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
JASON-1 Microwave Radiometer
SENSOR
Name: JASON-1 MICROWAVE RADIOMETER (JASON-1 Microwave Radiometer)
Swath Width: 22.9 km
Description: The JMR measures the sea surface microwave brightness temperatures at three frequencies (18.7 GHz, 23.8 GHz and 34.0 GHz) to provide the total water vapor content in the troposphere along the altimeter beam. The 23.8 GHz channel is the primary channel for water-vapor measurement and is a redundant channel on the JMR. The 18.7 GHz channel provides a correction for wind-induced effects in the sea surface background emissions, and the 34.0 GHz channel provides a correction for cloud liquid water. The measurements are combined to obtain the error in the satellite range measurements caused by pulse delay due to the water vapor.

TOPEX/POSEIDON
Platform
Name: Topography Experiment/Poseidon (TOPEX/POSEIDON)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
SSALT
SENSOR
Name: POSEIDON Solid State Radar Altimeter (SSALT)
Swath Width: 5 km
Description: A satellite altimeter consists of a transmitter that sends out very sharp pulses, a sensitive receiver to record the pulse after it is reflected from the sea surface, and an accurate clock to note the time interval between transmission and reception. Examples of satellite altimeters used in the remote sensing of ocean surface height, wave height and wind speed are Seasat, Geosat and Topex/Poseidon.

TOPEX/POSEIDON
Platform
Name: Topography Experiment/Poseidon (TOPEX/POSEIDON)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
TMR
SENSOR
Name: TOPEX MICROWAVE RADIOMETER (TMR)
Swath Width: 5 km
Description: The TMR measures the sea surface microwave brightness temperatures at three frequencies (18 GHz, 21 GHz and 37 GHz) to provide the total water-vapor content in the troposphere along the altimeter beam. The 21 GHz channel is the primary channel for water-vapor measurement. It is redundant (21A and 21B). The 18 GHz and 37 GHz channels are used to remove the effects of wind speed and cloud cover, respectively in the water-vapor measurement. TMR data are sent to CNES for processing along with their altimeter data. The measurements are combined to obtain the error in the satellite range measurements caused by pulse delay due to the water vapor.

OSTM/JASON-2
Platform
Name: Ocean Surface Topography Mission/Jason-2 (OSTM/JASON-2)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
POSEIDON-3
SENSOR
Name: OSTM/Jason-2 RADAR alitmieter (POSEIDON-3)
Swath Width: 5.1 km
Description: The Poseidon-3 altimeter, operating at 13.575 GHz (Ku band) and 5.3 GHz (C band), is the primary sensor for the OSTM mission. The measurements made at the two frequencies are combined to obtain measurements of the altimeter range, wind speed, significant wave height, and the ionoshperic correction. The Poseidon-3 package consists of dual redundant altimeter units each of which has low mass and low power consumption.

OSTM/JASON-2
Platform
Name: Ocean Surface Topography Mission/Jason-2 (OSTM/JASON-2)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AMR
SENSOR
Name: Advanced Microwave Radiometer (AMR)
Swath Width: - km
Description: -

Jason-1 Geodetic
Platform
Name: Jason-1 Geodetic (Jason-1 Geodetic)
Orbit Period: 99999 minutes
Inclination Angle: 66.15 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
POSEIDON-2
SENSOR
Name: JASON-1 RADAR ALTIMETER (POSEIDON-2)
Swath Width: - km
Description: The Poseidon-2 altimeter, operating at 13.575 GHz (Ku band) and 5.3 GHz (C band), is the primary sensor for the JASON-1 mission. The measurements made at the two frequencies are combined to obtain measurements of the altimeter range, wind speed, significant wave height, and the ionospheric correction. The Poseidon-2 package consists of dual redundant altimeter units each of which has low mass and low power consumption.

Jason-1 Geodetic
Platform
Name: Jason-1 Geodetic (Jason-1 Geodetic)
Orbit Period: 99999 minutes
Inclination Angle: 66.15 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
JASON-1 Microwave Radiometer
SENSOR
Name: JASON-1 MICROWAVE RADIOMETER (JASON-1 Microwave Radiometer)
Swath Width: 22.9 km
Description: The JMR measures the sea surface microwave brightness temperatures at three frequencies (18.7 GHz, 23.8 GHz and 34.0 GHz) to provide the total water vapor content in the troposphere along the altimeter beam. The 23.8 GHz channel is the primary channel for water-vapor measurement and is a redundant channel on the JMR. The 18.7 GHz channel provides a correction for wind-induced effects in the sea surface background emissions, and the 34.0 GHz channel provides a correction for cloud liquid water. The measurements are combined to obtain the error in the satellite range measurements caused by pulse delay due to the water vapor.

JASON-3
Platform
Name: Jason-3 (JASON-3)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AMR
SENSOR
Name: Advanced Microwave Radiometer (AMR)
Swath Width: - km
Description: -

JASON-3
Platform
Name: Jason-3 (JASON-3)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
POSEIDON-3B
SENSOR
Name: POSEIDON-3B (POSEIDON-3B)
Swath Width: 5.1 km
Description: POSEIDON-3B

ProjectMaking Earth Science Data Records for Use in Research Environments (MEaSUREs)
Data ProviderCreator: Zlotnicki, Victor; Qu, Zheng; Willis, Joshua
Release Place: JPL
Release Date: 2019-Mar-07
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/merged_alt/L4/docs/alti-gridding-jpl-PODAAC-UserGuide_201902017.pdf
Keyword(s)SSHA, SSH, SLA, Sea Surface Height, Sea Level, OST
Persistent IDPODAAC-SLREF-CDRV2
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Citation Zlotnicki, Victor; Qu, Zheng; Willis, Joshua. 2019. MEaSUREs Gridded Sea Surface Height Anomalies Version 1812. Ver. 1812. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SLREF-CDRV2.

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