GGSE 1 (GGRS), 728
Orbit data source: Space-Track
GGSE 1 (GGRS), 728 is an American payload satellite in LEO that was launched on Sat, 11 Jan 1964 UTC via a THOR SLV-2A AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
NRL 20", Unknown motor
Mass
38 kg wet, 38 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
SPHERE + ANT, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 GGSE 1 (GGRS)
1 00728U 64001B 26274.58790700 .00000025 00000-0 55436-4 0 9999
2 00728 69.9095 334.4310 0015031 219.8708 140.1295 13.97792545194547Epoch: 2026-10-01T14:06Z
TLE epoch observation values (Epoch: 2026-10-01T14:06:35.164Z)
Latitude
-0.00003°
Longitude
112.46241°
Altitude
912.163 km
Speed
7.392 km/s
True Right ascension
22h 17m 43s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
22:31:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
910.439 km
Perigee altitude
888.561 km
Semi-major axis
7,277.637 km
Eccentricity
0.0015
Inclination
69.9095°
RAAN
334.431°
Arg. of periapsis
219.8708°
True anomaly
140.23976°
Mean anomaly
140.1295°
Eccentric anomaly
140.18464°
Mean motion
3.49589 °/min
Orbital period
102.98 mins
BSTAR
0.000055436
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Other satellites on launch #1 in the year 1964 (1964-01-11 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.GGSE 1 (GGRS) Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-10-02 05:40:57.580Z | 207.437° SW | 2026-10-02 05:46:57.580Z | 349.946° N | 74.037° | 2026-10-02 05:51:57.580Z | 22.295° NNE |
| 5 mins | 2026-10-02 07:30:57.580Z | 293.371° NW | 2026-10-02 07:32:57.580Z | 314.996° NW | 14.724° | 2026-10-02 07:35:57.580Z | 345.874° N |
| 9 mins | 2026-10-02 14:43:57.580Z | 348.772° N | 2026-10-02 14:47:57.580Z | 65.252° ENE | 58.57° | 2026-10-02 14:52:57.580Z | 139.46° SSE |
| 7 mins | 2026-10-02 16:29:57.580Z | 293.684° NW | 2026-10-02 16:32:57.580Z | 257.624° W | 20.169° | 2026-10-02 16:36:57.580Z | 214.372° SW |
| 6 mins | 2026-10-03 04:01:57.580Z | 131.459° SE | 2026-10-03 04:04:57.580Z | 95.32° ESE | 19.32° | 2026-10-03 04:07:57.580Z | 62.483° ENE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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