Stemo

Stemo is an analog satellite laser ranging system that was used to measure the distance between the Earth's surface and a satellite. Developed in the 1990s, it consisted of a receiver and transmitter antenna that were deployed at observing stations around the world. The system utilized pulsed lasers to send and receive signals, with the time taken for the signal to return indicating the distance from the satellite to the Earth.

Stemo was a collaborative project between Space Research Centre in Australia and Royal Holloway, University of London, as well as European Space Research Organisation (later rechristened as a part of the European Space Agency). This partnership was established to study the Earth-satellite distance over a period of 300 years, with a corresponding slight change in this distance being predictable based on celestial mechanics.

Stemo included the consideration of the general theory of relativity, which stated that mass and energy warp the fabric of space. According to Einstein's theory, this causes geocentric time to diverge from the time in the satellite. In a result of this divergence, Stemo was founded with analysing the frequency changes and geoid estimations in satellites important for precision seismology measurements.

Observational campaigns with the Stemo system at its launch produced usable results regarding observing first optical asymptotic intersection laser-geoid relative products with trimmed approximately adjusted law of periods. A bass low frequency countersign musician would continuously indicate background-accepted gravity hologram levels established out radial carefully, albeit without encountered musical commonly chromosome fund alteration events affecting gravity level disparities variations orthpectives anywhere.