TOPEX/POSEIDON ALTIMETER MERGED GEOPHYSICAL DATA RECORD GENERATION B

TOPEX/POSEIDON ALTIMETER MERGED GEOPHYSICAL DATA RECORD GENERATION B
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DOI10.5067/TPMGD-BIN0B
Short NamePODAAC_MGDR
DescriptionThe TOPEX/POSEIDON MGDR (Merged Geophysical Data Record) contains global coverage altimeter data. This data set (MGDR-B) contains generation B data which replaces the generation A data set. The objective of the TOPEX/POSEIDON mission, launched in August 1992 and currently operating, is to determine ocean topography with a sea surface height measurement precision of 3 cm and a sea level measurement accuracy of 13 cm. The data product combines measurements from two altimeters, a NASA dual frequency (Ku and C band) instrument similar to the Geosat altimeter, and a French (CNES) instrument which is a proof-of-concept solid-state altimeter (Ku band). This data set contains mean sea surface, ionospheric corrections, sigma0 and all parameters needed to calculate sea surface height anomalies and total electron content. The data are in binary format.
VersionB
Dataset TypeOPEN
MeasurementOceans > Sea Surface Topography > Sea Surface Height > none
Oceans > Sea Surface Topography > Significant Wave Height > none
Processing Level2
CoverageRegion: Global
Northernmost Latitude: 66 degrees
Southernmost Latitude: -66 degrees
Westernmost Longitude: 0 degrees
Easternmost Longitude: 360 degrees
Time Span: 1992-Sep-25 to 2005-Oct-08
ResolutionSpatial Resolution: 11.2 km (Along) x 5.1 km (Across)
ProjectionType: Swath
Detail: none
Ellipsoid: none
Latency hours
Swath Width5 km
Sample Frequency1
Temporal Repeat (Nominal)10 Day
Temporal Repeat (Min)-
Temporal Repeat (Max)-
Platform/Sensor
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
/
ALT (TOPEX)
SENSOR
Name: TOPEX ALTIMETER (ALT (TOPEX))
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
/
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.

ProjectTOPEX/Poseidon (TOPEX/POSEIDON)
Data ProviderCreator: NASA/JPL/PODAAC
Release Place: JPL
Release Date: 1998-Apr-21
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/mgdrb/docs/uhmgdrb/html/usr_toc.htm
Keyword(s)SSHA, SSH, SWH, sea surface height anomaly, sea level anomaly
Persistent IDPODAAC-TPMGD-BIN0B
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
User's Guide
PO.DAAC MERGED GDR (TOPEX/POSEIDON)Gen B (MGDR-B) HANDBOOKhttps://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/mgdrb/docs/uhmgdrb/html/usr_toc.htm
T/P MGDR-B users guide
Project Materials
TOPEX/Poseidon cycle listhttps://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/docs/tp_cyclelist.txt
TOPEX/Poseidon cycle start list
Known Issues
TOPEX/Poseidon safeholdshttps://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/docs/tpsafehold.txt
TOPEX/Poseidon safeholds and known data outages
TOPEX/Poseidon maneuvers listhttps://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/docs/tp_maneuver.txt
TOPEX/Poseidon manuevers
Citation NASA/JPL/PODAAC. 1998. TOPEX/POSEIDON ALTIMETER MERGED GEOPHYSICAL DATA RECORD GENERATION B. Ver. B. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at http://dx.doi.org/10.5067/TPMGD-BIN0B.

For more information see Data Citations and Acknowledgments.

Journal Reference https://podaac-tools.jpl.nasa.gov/drive/files/allData/topex/L2/mgdrb/docs/uhmgdrb/html/usr_toc.htm