STEREO-A Ephemeris in the HCI Coordinate System

STEREO atttitude and orbit data are distributed as SPICE kernels. Since most SEP investigators would rather not deal with SPICE kernels, Caltech provides text files containing position data for the two STEREO spacecraft, in the following coordinate systems: GEI, GSE, GSM, HCI, HEE, HEEQ.

Data and Resources

Additional Info

Field	Value
Maintainer	NASA Space Physics Data Facility
Last Updated	November 5, 2026, 13:40 (UTC)
Created	August 10, 2026, 22:09 (UTC)
Identifier	https://doi.org/10.48322/4m9a-ge57
Modified	2026-11-02T22:16:02Z
Theme	{Heliophysics}
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	9b412a62-13d4-414c-a3f1-f4bf6ffdd46f
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
landingPage	https://doi.org/10.48322/4m9a-ge57
license	https://www.usa.gov/government-works
programCode	{026:000}
publisher	AttitudeOrbit
resource-type	Dataset
source_datajson_identifier	true
source_hash	2a46bb241ef26f11f4c35f49895856fcae0721774490ebee70de1f6833b7cafd
source_schema_version	1.1