Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2

(MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52)

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Version History

Version	5.2
Processing Level	4
Start/Stop Date	1992-Sep-01 to Present
Short Name	MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52
Description	This dataset contains the Global Mean Sea Level (GMSL) trend generated from the Integrated Multi-Mission Ocean Altimeter Data for Climate Research Version 5.2. The GMSL trend is a 1-dimensional time series of globally averaged Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6A that covers September 1992 to present with a lag of up to 4 months. The data are reported as variations relative to a 20-year TOPEX/Jason collinear mean. Bias adjustments and cross-calibrations were applied to ensure SSHA data are consistent across the missions; Glacial Isostatic Adjustment (GIA) was also applied. The data are available as a table in ASCII format. Changes between the version 5.1 and version 5.2 releases are described in detail in the user handbook.
DOI	10.5067/GMSLM-TJ152
Measurement	OCEANS > SEA SURFACE TOPOGRAPHY > SEA SURFACE HEIGHT
Platform/Sensor	OSTM/JASON-2 Platform Name: Ocean Surface Topography Mission/Jason-2 (OSTM/JASON-2) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / AMR SENSOR Name: Advanced Microwave Radiometer (AMR) OSTM/JASON-2 Platform Name: Ocean Surface Topography Mission/Jason-2 (OSTM/JASON-2) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / POSEIDON-3 SENSOR Name: OSTM/Jason-2 RADAR alitmieter (POSEIDON-3) Swath Width: 5.1 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. JASON-1 Platform Name: JASON-1 (JASON-1) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / JASON-1 Microwave Radiometer SENSOR Name: JASON-1 MICROWAVE RADIOMETER (JASON-1 Microwave Radiometer) Swath Width: 22.9 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. JASON-1 Platform Name: JASON-1 (JASON-1) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / POSEIDON-2 SENSOR Name: JASON-1 RADAR ALTIMETER (POSEIDON-2) TOPEX/POSEIDON Platform Name: Topography Experiment/Poseidon (TOPEX/POSEIDON) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / ALT (TOPEX) SENSOR Name: TOPEX ALTIMETER (ALT (TOPEX)) Swath Width: 5.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. TOPEX/POSEIDON Platform Name: Topography Experiment/Poseidon (TOPEX/POSEIDON) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / TMR SENSOR Name: TOPEX MICROWAVE RADIOMETER (TMR) Swath Width: 5.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. TOPEX/POSEIDON Platform Name: Topography Experiment/Poseidon (TOPEX/POSEIDON) Orbit Period: 112.43 minutes Inclination Angle: 66.04 degrees / SSALT SENSOR Name: POSEIDON Solid State Radar Altimeter (SSALT) Swath Width: 5.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. JASON-3 Platform Name: Jason-3 (JASON-3) Orbit Period: 112.0 minutes Inclination Angle: 66.05 degrees / POSEIDON-3B SENSOR Name: POSEIDON-3B (POSEIDON-3B) Swath Width: 5.1 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. Show More
Project	NASA Sea Surface Height Products based on Radar Altimetry (NASA-SSH)
Project	Making Earth System Data Records for Use in Research Environments (MEaSUREs)
Data Provider	Publisher: GSFC Creator: Beckley, B.; Yang, X.; Zelensky, N.P.; Holmes, S.A.;Lemoine, F.G.; Ray, R.D.; Mitchum, G.T.; Desai, S.; Brown, S.T. Release Place: JPL Release Date: 2024-Dec-01 Resource: https://podaac.jpl.nasa.gov/NASA-SSH
Format	ASCII
Keyword(s)	GMSL, sea level, trend, TOPEX, Poseidon, TOPEX/Poseidon, T/P, Jason-1, J1, OSTM, Jason-2, J2, Jason-3, J3, global mean sea level, radar altimetry

Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov

Resolution Spatial Resolution: 132 Decimal Degrees x 360 Decimal Degrees Temporal Resolution: Weekly - < Monthly Coverage Region: GLOBAL North Bounding Coordinate: 66 degrees South Bounding Coordinate: -66 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 1992-Sep-01 to Present Granule Time Span: 1992-Dec-31 to 2025-Feb-21 Projection Projection Detail: N/A

DIRECT ACCESS
Browse Granule Listing
https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2902359309-POCLOUD
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https://search.earthdata.nasa.gov/search/granules?p=C2902359309-POCLOUD
DIRECT S3-ACCESS
Available for access in-region with AWS Cloud
Region
us-west-2
Bucket/Object Prefix: Protected buckets contain the data files for a given collection. Protected simply means users must log in to Earthdata Login before gaining access to contents within that S3 Bucket. Please use the S3Credential endpoint to gain an Earthdata login token for use in S3 Access. Public buckets, in contrast, house metadata such as checksums, imagery, and metadata files and the like. A user can access public buckets and these types of files without logging in to Earthdata Login. Most of the time, you'll want to access the protected bucket Information
podaac-ops-cumulus-protected/MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52/
podaac-ops-cumulus-public/MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52/
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DATA CITATION GUIDELINES
https://podaac.jpl.nasa.gov/CitingPODAAC Data Use and Citation Guidelines
PUBLICATIONS
https://doi.org/10.1016/j.asr.2010.02.020 Ray, R.D., B.D. Beckley, F.G. Lemoine. Vertical crustal motion derived from satellite altimetry and tide gauges, and comparisons with DORIS measurements. Adv. Space Research, 45 (2010) 1510-1522, doi: 10.1016/j.asr.2010.02.020
https://doi.org/10.1109/TGRS.2009.2037220 Near-land radiometer wet path-delay retrieval algorithm description
https://doi.org/10.1029/2007GL030002 Beckley, B.D., F.G. Lemoine, S.B. Luthcke, R.D. Ray, and N.P. Zelensky. 2007. A reassessment of TOPEX and Jason-1 altimetry based on revised reference frame and orbits. Geophys. Res. Lett., 34, L14608, DOI:10.1029/2007GL030002.
https://doi.org/10.1002/2017JC013090 Beckley, B.D., P.S. Callahan, D.W. Hancock, G.T. Mitchum, and R.D. Ray. 2017. On the cal-mode correction to TOPEX satellite altimetry and its effect on the global mean sea level time series. Journal of Geophysical Research: Oceans, 122.https://doi.org/10.1002/2017JC013090.
https://doi.org/10.1175/2009JTECHA1305.1 Microwave radiometer calibration over decadal time scales
https://ntrs.nasa.gov/citations/19990089548 Ray, R.D. 1999. A global ocean tide model from TOPEX/Poseidon altimetry: GOT99.2, NASA TM-1999-209478, NASA Goddard Space Flight Center, September 1999 (Update).
https://doi.org/10.1080/01490410490465643 Jason-1 radiometer performance and calibration
https://doi.org/10.1016/j.asr.2010.05.007 Lemoine, F.G., N.P. Zelensky, D.S. Chinn, D.E. Pavlis, D.D. Rowlands, B.D. Beckley, S.B. Luthcke, P. Willis, M. Ziebart, A. Sibthorpe, J. Boy, V. Luceri, Towards development of a consistent orbit series for TOPEX, Jason-1, and Jason-2, Adv. Space Research, 46 (2010) 1513-1540, doi: 10.1016/j.asr.2010.05.007
https://doi.org/10.1073/pnas.1717312115 Nerem, R.S., B.D. Beckley, J.T. Fasullo, B.D. Hamlington, D. Masters, and G.T. Mitchum,2018. "Climate-changedriven accelerated sea-level rise detected in the altimeter era."Proceedings of the National Academy of Sciences, 201717312. https://doi.org/10.1073/pnas.1717312115.
https://doi.org/10.1175/JTECH1993.1 Validation and development of melting layer models
https://doi.org/10.1109/TGRS.2006.888098 Long-term stability of microwave radiometers using noise diodes for calibration
https://doi.org/10.1016/j.asr.2010.05.008 Zelensky, N.P., F.G. Lemoine, M. Ziebart, A. Sibthorpe, P. Willis, B.D. Beckley, S.M. Klosko, D.S. Chinn, D.D. Rowlands, S.B. Luthcke, D.E. Pavlis, V. Luceri, DORIS/SLR POD modeling improvements for Jason-1 and Jason-2, Adv. Space Research, 46(12), 1541-1558, 2010. doi: 10.1016/j.asr.2010.05.008
GENERAL DOCUMENTATION
https://podaac.jpl.nasa.gov/NASA-SSH Project Information Page
USER'S GUIDE
https://doi.org/10.5067/ALTUG-TJ152 Integrated Multi-Mission Ocean Altimeter Data for Climate Research TOPEX/Poseidon, Jason-1, 2, 3, and Sentinel-6 Version 5.2

Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.

Citation

Beckley, B.; Yang, X.; Zelensky, N.P.; Holmes, S.A.;Lemoine, F.G.; Ray, R.D.; Mitchum, G.T.; Desai, S.; Brown, S.T.. 2024. Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2. Ver. 5.2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GMSLM-TJ152

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For more information see Data Citations and Acknowledgments.

Journal Reference

Beckley, B.D., P.S. Callahan, D.W. Hancock, G.T. Mitchum, and R.D. Ray. 2017. On the cal-mode correction to TOPEX satellite altimetry and its effect on the global mean sea level time series, Journal of Geophysical Research: Oceans, 122, 11. https://doi.org/10.1002/2017JC013090

Version	Dataset	Version Date	Status
5.2	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2	2024-12-01	ACTIVE	2024-12-01T00:00:00.000Z
5.1	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, and Jason-3 Version 5.1	2022-02-01	RETIRED.	2022-02-01T00:29:00.000Z
5	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, and Jason-3 Version 5.0	Present	RETIRED.
4.2	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 4.2	Present	RETIRED.
4	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 4	Present	RETIRED.
3	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 3	Present	RETIRED.
2	Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 2	Present	RETIRED.
1	Global Mean Sea Level from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2	2024-04-23	RETIRED.	2024-04-23T14:02:00.000Z

Cloud Enabled

Status:

ACTIVE

Short Name:

MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52

Collection Concept ID:

C2902359309-POCLOUD

Spatial Coverage:

N: 66°

S: -66°

E: 180°

W: -180°

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PO.DAAC Data Subscriber

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                        Simple: podaac-data-downloader -c MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52 -d ./data --start-date 1992-09-01T00:00:00Z --end-date 1992-09-08T00:00:00Z -e ""
Download by Spatial and Temporal Search: podaac-data-downloader -c MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52 -d ./data --start-date 1992-09-01T00:00:00Z --end-date 1992-09-08T00:00:00Z -b="-180,-66,180,66"
Download by Extension: podaac-data-downloader -c MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52 -d ./data --start-date 1992-09-01T00:00:00Z --end-date 1992-09-08T00:00:00Z -e .nc
Download recent data (360 min.): podaac-data-subscriber -c MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52 -d ./data -m 360
Download recent data (1440 min.): podaac-data-subscriber -c MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52 -d ./data -m 1440

Direct S3-Access

Available for access in-region with AWS Cloud

Region:

us-west-2

Bucket/Object Prefix Protected buckets contain the data files for a given collection. Protected simply means users must log in to Earthdata Login before gaining access to contents within that S3 Bucket. Please use the S3Credential endpoint to gain an Earthdata login token for use in S3 Access.

Public buckets, in contrast, house metadata such as checksums, imagery, and metadata files and the like. A user can access public buckets and these types of files without logging in to Earthdata Login.

Most of the time, you'll want to access the protected bucket Information

podaac-ops-cumulus-protected/MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52/

podaac-ops-cumulus-public/MERGED_TP_J1_OSTM_OST_GMSL_ASCII_V52/

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Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2

Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2

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Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2

Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, and Sentinel-6 Version 5.2

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