Jason-1 SGDR version E NetCDF Geodetic
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DOINot Registered
Short NameJASON-1_L2_OST_GPS_E_GEODETIC
DescriptionThe Sensory Geophysical Data Record (SGDR) files from the Geodetic Mission contain full accuracy altimeter data, with a high precision orbit. The instruments on Jason-1 make direct observations of the following quantities: altimeter range, significant wave height, ocean radar backscatter cross-section (a measure of wind speed), ionospheric electron content (derived by a simple formula), tropospheric water content, mean sea surface, and position relative to the GPS satellite constellation. The SGDR contain all relevant corrections needed to calculate the sea surface height. It also contains the 20Hz waveforms that are required for retracking. The SGDR is an expert level product, if you do not require the waveforms then the GDR will be more suited for your needs.
VersionE
Dataset TypeOPEN
MeasurementOCEANS > OCEAN WAVES > SIGNIFICANT WAVE HEIGHT
OCEANS > SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT
Processing Level2
CoverageRegion: Global
Northernmost Latitude: 66.15 degrees
Southernmost Latitude: -66.15 degrees
Westernmost Longitude: 0 degrees
Easternmost Longitude: 360 degrees
Time Span: 2012-May-07 to 2013-Jun-21
ResolutionSpatial Resolution: 11.2 km (Along) x 5.1 km (Across)
ProjectionType: Swath
Detail: N/A
Ellipsoid:
Latency hours
Swath Width- km
Sample Frequency20
Temporal Repeat (Nominal)11 Day
Temporal Repeat (Min)4 Day
Temporal Repeat (Max)406 Day
Platform/Sensor
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-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
/
TRSR
SENSOR
Name: Turbo Rouge Space Receiver (TRSR)
Swath Width: - km
Description: The TRSR isa an advanced codeless sixteen-channel Global Positioning System (GPS) receiver developed bye the Jet Propulsion Laboratory (JPL). The on-board package is comprised of dual redunedant TRSR units and choke ring antennae. The GPS data are intended to provide supplementary positioning data in support of the POD function and/or to improve gravity field models.

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
/
DORIS
SENSOR
Name: Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS)
Swath Width: 0 km
Description: The DORIS system uses a two-channels receiver (1401.25 MHz and 2036.25 MHz) on the satellite to observe the Doppler signals from a network of 40 to 50 ground transmitting stations. It provides all-weather global tracking of the satellite for CNES precise orbit determination and an accurate correction for the influence of the ionosphere on both the Doppler signal and altimeter signals.

ProjectJason-1 (JASON-1)
Data ProviderCreator: JASON-1
Release Place: JPL
Release Date: 2015-Oct-08
Resource: N/A
Persistent IDPODAAC-J1GPS-NCG0E
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Citation JASON-1. 2015. Jason-1 SGDR version E NetCDF Geodetic. Ver. E. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD].

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