Data Access



PO.DAAC Drive Version: 1.6

PO.DAAC Drive provides an FTP alternative for browsing and retrieving data at PO.DAAC.  It offers file navigation and download through an interface served directly through your browser, and with a familiar look and feel.  It also allows users to access data via a command line so that interactions can be easily scripted.  As a new feature, thanks to the underlying open technologies,  it also enables mounting the remote data to your own local computer, seeing the data as if you had the entire PO.DAAC archive mounted on your own machine.

For help on using Drive see the PO.DAAC Drive Data Recipes

For questions or to provide feedback, please visit the PO.DAAC Drive Forum


File Transfer Protocol (FTP)  RETIRED!


For more information and alternate methods of access, please see our last Announcement


Open-source Project for a Network Data Access Protocol (OPeNDAP) Version 1.12.2

OPeNDAP enables remote datasets to be accessed through familiar data analysis and visualization packages, just as if they resided locally on the user's machine. OPeNDAP handles transport, translation and subsetting of data residing in most Earth science data formats. For a list of PO.DAAC data accessible through OPeNDAP, see PO.DAAC OPeNDAP data.

For a guide and tutorial to using OPeNDAP see Forum Topic

For questions or to provide feedback, please visit the PO.DAAC OPENDAP Forum


Thematic Realtime Environmental Distributed Data Services (THREDDS)  Version 4.6.3

THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets, using a variety of remote data access protocols (i.e.: OPeNDAP, OGC WMS and WCS, HTTP, etc.)

For questions or to provide feedback, please visit the PO.DAAC THREDDS Forum

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Web Services Version: 3.2.3

PO.DAAC Web Services are application programming interfaces (APIs) that can be accessed through standard web protocols.  The W3C defines a Web Service in part as, "A software system designed to support interoperable machine-to-machine interaction over a network," (for the full definition, see ). The PO.DAAC Web Services use a Representational State Transfer (REST) model with calls issued over a Hypertext Transfer Protocol (HTTP) connection.  On receipt of a request message, our services return the response in either an Extensible Markup Language (XML) structure or, optionally, a JavaScript Object Notation (JSON) format.

The new version 3.2.2 of the PO.DAAC Web Services have been modified to conform to an updated API in the new HiTIDE/L2SS (High-level Tool for Interactive Data Extraction / L2 Subsetting Services).  Also, there are significant changes in the Granule Subset web service.  The Granule Subset web service is now asynchronous, which prevents web timeouts and allows the subsetting of multiple granules in a single request.  A Granule Subset request is submitted, using http POST rather than GET, and a token is returned that can be used in the new Subset Status web service to determine the state of the Granule Subset request.  There is also a new Dataset Variables web service.

For questions or to provide feedback, please visit the PO.DAAC Web Services Forum


Metadata Compliance Checker (MCC) Version: 1.3.1

The Metadata Compliance Checker (MCC) is an online tool and web service designed to check and validate the contents of netCDF and HDF granules for the Climate and Forecast (CF) and Attribute Convention for Dataset Discovery (ACDD) metadata conventions.  It produces quantitative scoring for these convention attributes as HTML, PDF or JSON outputs. It also checks GHRSST version 2 data formats as applicable.  It works with both user locally uploaded data as well as data that are accessible via OPeNDAP. The MCC is based on open source software originally developed by NOAA that has been extended with additional functionality and reporting.

For questions or to provide feedback, please visit the Metadata Compliance Checker (MCC) Forum

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Webification   (BETA)

Webification (W10n) is ReSTful Webservice technology providing simplified access to PODAAC data and metadata via HTTP/HTTPS protocols with URLs comprised of well-defined parameters. W10n supports major Earth science data formats like NetCDF and HDF 4/5, and abstracts an arbitrary data store as a hierarchical tree of nodes for  each associated attributes which can be interrogated.  Direct access to inner components of the tree is via HTTP requests from either a web browser, script or similar client. Results of W10n calls return specified measurement arrays or metadata elements via subset by array value (v.s. subset by array index), according to supported output formats (JSON, HTML, netCDF) as specified in the URL request.

For questions or to provide feedback, please visit the Webification (w10n) Forum



State of the Ocean (SOTO) Version 4.4

SOTO is a suite of tools presented through an interactive, web-based visualization front end. It provides access to a broad range of satellite-derived products and key parameters of interest to the oceanographic community. SOTO facilitates visual exploration and comparative analysis of physical oceanographic data, enabling scientific oceanographic, climate, and related research.

SOTO version 4.4.0 provides the full dataset record for GRACE-Tellus L3 MASCON RL06 Data, as well as updates for SMAP JPL SSS V4.2 and SMAP RSS V3.  There are various bug fixes, as well.

  • To best experience SOTO, we recommend using a recent version of one of the following browsers:  Google Chrome, Mozilla Firefox, or Apple Safari.  (Note that Internet Explorer is not currently supported.)  Additionally, we recommend that prior to first loading the new SOTO, you clear your browser's cache.

For questions or to provide feedback, please visit the State Of The Ocean (SOTO) Forum



High-level Tool for Interactive Data Extraction / L2 Subsetting Services  (HiTIDE/L2SS) Version: 4.2.0  

The new HiTIDE version includes a redesigned user interface, improved search and granule selection workflow, instant granule variable visualization, and many more enhancements. HiTIDE allows users to subset and download popular PO.DAAC level 2 (swath) datasets. Users can search across a wide variety of parameters, such as variables, sensors and platforms, and filter the resulting data based on spatial and temporal boundaries of interest to the user. HiTIDE goes even further, offering instant previews of variable imagery, allowing users to rapidly find data of interest for download and further, rigorous scientific analysis. HiTIDE's  user interface is powered by a set of web services which facilitate machine to machine interoperability.

For questions or to provide feedback, please visit the HiTIDE/L2SS Forum

PO.DAAC LAS v7.3 LAS Product Server

Live Access Server (LAS) (L3 Subsetter) Version 8.6.x

LAS is a web-based L3 data visualization and subsetting tool, designed to provide flexible access to geo-referenced scientific data. It enables the web user to: visualize data with on-the-fly graphics; request custom subsets of variables in a choice of file formats; access background reference material about the data (metadata); compare (difference) variables from distributed locations.

For a guide and tutorial to using LAS see Forum Topic

For questions or to provide feedback, please visit the PO.DAAC LAS Forum

PO.DAAC Code Repository



PO.DAAC created a GitHub for hosting all PO.DAAC code. Each record in the inventory was tagged with labels to indicate the language of the script and the functionality. A standard Apache 2.0 license  was also added to the script. Each script was added to PO.DAAC’s GitHub and exposed to through a JSON file.


earthdata search


Earthdata Search

This application allows you to search, discover, visualize, refine, and access NASA Earth Observation data. It provides search and access capabilities for dataset holdings at all of the Distributed Active Archive Centers (DAACs) as well as the PO.DAAC.


Global Change Master Directory (GCMD)

GCMD holds Earth science data set and service descriptions, such as location of the data or service, associated investigators and other contacts, spatial and temporal coverage, and resolution that provide vital information to help determine whether the data or service meets the user’s needs. Use the GCMD to search for information about data and services; to order EOSDIS data, use search-and-order systems such as the EDG or DAAC-specific systems.