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The Open-source Project for a Network Data Access Protocol (OPeNDAP), developed at the University of Rhode Island, 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, and provides tools for transforming existing applications into OPeNDAP clients (for example, enabling them to remotely access OPeNDAP served data). View OPeNDAP documentation and resources.

OPeNDAP requires the use of Earthdata Login account. Watch our video tutorial to learn how to sign up for an account.

Tool at a Glance

OPeNDAP News

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The  Climate Prediction Center (CPC) 4 km Infrared (IR) dataset archive now extends back to January 1998, offering over 25 years of high-resolution infrared observations and continuing into the present.
News
June 20, 2025
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OPeNDAP Learning Resources

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Learn how to generate a time-height plot of the measured Hurricane and Severe Storm Sentinel (HS3) High-Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP) radar reflectivity through a Python plotting routine.
Data Recipe
Dec. 2, 2022
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While NASA data are openly available without restriction, an Earthdata Login is required to download data and to use some tools with full functionality.

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Frequently Asked Questions

Earthdata Forum

Our online forum provides a space for users to browse thousands of FAQs about research needs, data, and data applications. You can also submit new questions for our experts to answer.

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