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Explorer 29 GEOS-A Geodetic Earth-Gravity Research Spacecraft Family

Explorer 29, also known as GEOS-A or GEOS 1, was a NASA geodetic satellite launched November 6, 1965. Optical and radio beacons, transponders, and laser corner reflectors enabled intercomparison of tracking systems, investigation of Earth’s gravitational field, improved worldwide geodetic datum accuracy, and more precise tracking-site coordinates.

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Identity

Aliases
Explorer 29Explorer XXIXGEOS-AGEOS 11965 89AExplorer 29 spacecraft
Family Name
Explorer 29
Full Name
Explorer 29 GEOS-A Geodetic Earth-Gravity Research Spacecraft Family
Roles
orbiterobservatoryresearchtechnology_demonstrator
Status
retired
Type
spacecraft

Details

Description
Explorer 29, also known as GEOS-A or GEOS 1, was a NASA geodetic satellite launched November 6, 1965. Optical and radio beacons, transponders, and laser corner reflectors enabled intercomparison of tracking systems, investigation of Earth’s gravitational field, improved worldwide geodetic datum accuracy, and more precise tracking-site coordinates.
First Flight Year
1,965

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Creation Time
August 14, 2026 at 07:39:44 UTC
Updated Time
August 14, 2026 at 07:39:44 UTC