Earth Observation Satellites
2021-11-30 09:28:40.0 [tstevens] Move Concepts delete broader relation (null); add broader relation (STELLA [149dcad2-bf7c-4c0c-bb53-5ae32d71ecfb,825993] - Earth Observation Satellites [3466eed1-2fbb-49bf-ab0b-dc08731d502b,826121]);
2021-11-18 12:42:37.0 [tstevens] Move Concepts delete broader relation (null); add broader relation (STELLA [149dcad2-bf7c-4c0c-bb53-5ae32d71ecfb,825993] - Space-based Platforms [b39a69b4-c3b9-4a94-b296-bbbbe5e4c847,835875]);
STELLA
Stella was a 48 kg French satellite that was launched along with SPOT 3. It was a dense sphere of uranium alloy with 60 laser reflectors on the surface. Reflected laser beams enabled accurate geodetic measurements for the determination, with an accuracy of 1 cm, of the geoid, of oceanic and terrestrial tides, and of tectonic movements. It joined its still operational twin, Starlette, that was launched in 1975. [Summary provided by NASA0