spase-metadata.org SPASE landing pages.

HEO-2

ResourceID
spase://SMWG/Observatory/HEO2

Description

The HEO acronym indicates satellites in a Highly Elliptical Orbit, also known as Molniya orbits. These orbits have period of roughly 12 hours, with a perigee of no more than a few hundred kilometers, apogee of roughly 7 Re, and an inclination of about 63 degrees. The three HEO spacecraft are referred to as HEO-1, HEO-2, and HEO-3 or F1, F2, and F3, meaning flights 1-3. Because science is not the primary mission of the host vehicle, many of the details on the HEO spacecraft cannot be released at this time.

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Details

Version:2.7.1

Observatory

ResourceID
spase://SMWG/Observatory/HEO2
ResourceHeader
ResourceName
HEO-2
ReleaseDate
2026-07-20 16:22:43Z
RevisionHistory
RevisionEvent
ReleaseDate
2019-04-19 12:34:56.789Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2026-07-20 16:22:43Z
Note
Added HelioData InformationURL, Updated to SPASE Version 2.7.1. JWL
Description

The HEO acronym indicates satellites in a Highly Elliptical Orbit, also known as Molniya orbits. These orbits have period of roughly 12 hours, with a perigee of no more than a few hundred kilometers, apogee of roughly 7 Re, and an inclination of about 63 degrees. The three HEO spacecraft are referred to as HEO-1, HEO-2, and HEO-3 or F1, F2, and F3, meaning flights 1-3. Because science is not the primary mission of the host vehicle, many of the details on the HEO spacecraft cannot be released at this time.

Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/T.Paul.OBrien
2.GeneralContactspase://SMWG/Person/Joseph.F.Fennell
InformationURL
Name
ViRBO web page about HEO
URL
Description

Information about HEO data

InformationURL
Name
HelioData
URL
Description

The HelioData mission page provides an overview of the mission and more, such as all SPASE dataset records associated with it.

Location
ObservatoryRegion
Earth.NearSurface