LAGEOS


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AcronymDefinition
LAGEOSLAser GEOdynamics Satellite (NASA)
References in periodicals archive ?
Ciufolini had previously reported signs of frame dragging in the LAGEOS satellites' orbits, but this met with skepticism (S&T: July 1998, page 22).
The theory prediets that the two satellites LAGEOS and LAGEOS2 should be dragged about 2 meters in the direction of Earth's rotation as they orbit.
While postmodern critics of travel narrative have emphasized the hopelessness of dealing objectively with the description of facts, the accuracy of maps has improved dramatically with satellite photography (TIROS, SMS, GEOS, LAGEOS, LANDSAT) and mapping processes obtained by automated technology that scans electronically the earth's surface, beams the signals back to earth and converts them into visible images that render the physical reality of Earth with a degree of accuracy that was almost unthinkable a few decades ago.
Today, using data from satellites such as LAGEOS and the Global Positioning System, as well as laser-ranging equipment left on the Moon by Apollo astronauts and the Very Long Baseline Interferometry (VLBI) network, it's possible to detect very minute changes in the Earth's rotation, on the order of a few millimeters a day.
As an additional complication, LAGEOS has developed a wobble, causing the direction of its spin axis to change over the years.
Gravity is 100 billion times stronger than the force that the photons exert on LAGEOS, but over decades, the light quanta have cumulatively kicked the craft thousands of kilometers off course.