1976-039A
The Laser Geodetic Satellite was a 1970s NASA-MSFC program to provide a precise geodetic target. In the 1980s the Italian Space Agency funded and built a copy of Lageos, Lageos 2, which was launched in 1992.
Lageos was built by NASA-GSFC for a program managed by NASA-MSFC under NASA's EODAP (Earth and Ocean Dynamics Applications Program). The satellite was a sphere 0.60 m in diameter. It consisted of a brass core surrounded by two aluminum hemispheres studded with 426 laser retroreflectors. This low drag satellite was used as a laser target for precise geodetic measurements. It provided direct evidence for plate tectonic motion (`continental drift').
Lageos was launched at 0800 on 1976 May 4 by a Delta 2913 launch vehicle from Space Launch Complex 2-West at Vandenberg Air Force Base. The Delta No. 123 second stage entered a 169 km apogee suborbital path at 0808. The Star 37D third stage burned at 0811 to place the payload in a 309 km x 5920 km x 109 degree transfer orbit. At 0932, the TE-M-604-1 solid apogee motor ignited, and at 0935 it separated, placing Lageos in its final 5837 x 5945 km x 109.9 deg orbit.
| Lageos | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1976 May 4 | 0800:00? | Launch by Delta 2913 | |
| T+0:38 SRM 1-6 out | |||
| T+0:39 SRM 7-9 on | |||
| T+1:17 SRM 7-9 out | |||
| T+1:27 SRM 1-9 sep | |||
| T+3:50 MECO | |||
| 0803 | T+3:57 Thor sep | ||
| 0804:03 | T+4:03 SES-1 4:46 | ||
| T+5:25 Fairing | |||
| 0808:49 | T+8:49 SECO-1 | ||
| -1440 x 309 x 109.7 | |||
| 0811:30 | T+11:30 Spinup | ||
| 0811:32? | Stage 2 sep | ||
| 0811:34 | T+11:34 TES 1670 m/s | ||
| 0813:02 | T+13:02 TECO | 309 x 5920 x 109 | |
| 0814:14 | T+14:14 Stage 3 sep | ||
| 0823? | Stage 2 reentry | ||
| 0931:19? | A+0 AKM 916.5m/s | ||
| 0931:49 | T+1:31:49 AKM burnout A+30? | ||
| 0935:11 | A+3:22 (T+1:35:11) AKM sep | ||
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