2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Service/SPDF/DataService/HDO NASA Service Heliophysics Digital Observatory https://doi.org/10.48322/7amg-2875 2026-02-02T13:10:33Z 2024-08-23T16:12:05Z Only known prior ReleaseDate of the metadata 2024-09-30T17:26:15 Updated author list in PublicationInfo. LNG 2025-02-24T12:34:56.789Z Standardized lower case usage in DOI. LFB 20250224 2026-02-02T13:10:33Z Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB Heliophysics research often requires the use of a variety of observational and model artifacts to study processes relating to mass and energy transfer across different heliophysics domains. The Heliophysics Digital Observatory (HDO) unifies several legacy discipline-oriented heliophysics virtual observatories via a more streamlined and intuitive middleware system that takes advantage of the Space Physics Archive Search and Extract (SPASE) metadata and focuses on delivering higher-level data search and discovery capabilities beyond those of existing data services. SPASE metadata enables HDO to search/discover, locate and access multi-disciplinary data and model artifacts simultaneously from distributed repositories. The HDO functionalities supporting the NASA Heliophysics science goals are summarized below: 1) Search, locate, and access multi-disciplinary heliophysics digital resources (observational and model artifacts) to support research. 2) Support systems science research by providing simultaneous access to multi-disciplinary resources for multiple time intervals based on (a) solar wind and geomagnetic conditions, (b) observing platform locations, and (c) phenomenon-based event lists. 3) The HDO built-in magnetospheric-state query system (MSQS) allows resource searching by solar wind, IMF and geomagnetic conditions, extreme or otherwise. Please make the following acknowledgement in any resulting publication: "This research has made use of data provided by the Heliophysics Data Observatory (HDO)." Fung, Shing F., Dolan, Charles F. and Garcia, Leonard N. 2024-09-19T18:03:40 NASA Space Physics Data Facility spase://SMWG/Person/Shing.F.Fung PrincipalInvestigator spase://SMWG/Person/Charles.F.Dolan Developer TechnicalContact spase://SMWG/Person/Leonard.N.Garcia MetadataContact Fung, Shing F., Charles F. Dolan and Leonard N. Garcia (2021), The Heliophysics Digital Observatory (HDO): Providing Enhanced High-Level Data Search Capabilities, SH44C-07, presented at the AGU Fall Meeting 2021, New Orleans, December 13-17. https://ui.adsabs.harvard.edu/abs/2021AGUFMSH44C..07F/abstract Fung, S. F., C. F. Dolan, and L. N. Garcia (2022), The Nascent Heliophysics Digital Observatory (HDO): A Follow-on to the Heliophysics VxOs, presented at the 44th COSPAR Scientific Assembly, Athens, Greece, July 16-24. https://ui.adsabs.harvard.edu/abs/2022cosp...44.3485F/abstract Fung, Shing F., Hyunju K. Connor, Lan K. Jian, Guiping Liu, Charles F. Dolan, and Leonard N. Garcia (2024), The Heliophysics Digital Observatory (HDO): A Service for Supporting Cross-Disciplinary Heliophysics Research Community, presented at the 45th COSPAR Scientific Assembly, Busan, South Korea, July 13-21. https://app.cospar-assembly.org/2023/browser/presentation/34768 https://msqs.gsfc.nasa.gov/hdo/public The HDO Query Builder interface enables access to data products via a time-range selection; users may alternatively choose to upload an event list of time ranges. The resultant time ranges may be filtered by domain resource type (Solar, Heliospheric, Magnetospheric, ITM and Wave), magnetospheric state (MSQS) and/or by spacecraft location (via access to the SPDF/Satellite Situation Center). The resultant data products may be further filtered by resource type (Numerical, Display, Catalog, etc.). The main panel displays the available products and provides download access while the left sidebar captures all user selections and filters.