@article{Fung_Charles F. Dolan_Garcia_2024, title={The Heliophysics Digital Observatory}, url={https://hpde.io/NASA/Service/SPDF/DataService/HDO}, DOI={10.48322/7AMG-2875}, abstractNote={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. }, publisher={NASA Space Physics Data Facility}, author={Fung, Shing F. and Charles F. Dolan and Garcia, Leonard N.}, year={2024} }