Aerospace history strangest satellite, not an electronic device, the extraordinary role of scientist
annual space powers launch a variety of spacecraft into space, most of them are carrying a variety of sophisticated equipment for the ground to provide various services. However, the satellite also some electrical equipment and no one, is a mere dead, but then critical research scientists.
1976 Nian 5 4, a shape disco ball like satellite was launched from Vandenberg Air Force base, and its satellite early fifties and sixties, there is no external solar panels, but it does not bring any internal power supply; the Americans will zero-power the satellite named LAGEOS (laser Geodynamics satellite).
The satellite's diameter is very small, only 0.6 meters, but the quality is not light, but a little head heavy 400 kg! Other spacecraft strenuous weight loss, but it does affect specifically to maintain a high quality, maintain a high kinetic energy, reduce its thin atmosphere.
LAGEOS is a high accuracy satellite earth flying around, each small reflector surface mounted, with the top cover 426 to make it look like a golf ball reflector.
these reflectors, 422 made of quartz glass, while the remaining 4 are made of germanium, germanium four reflector being made positive tetrahedral profile, in order to obtain surface measurements of infrared.
satellite to a ground station by measuring the emission of the laser beam, the laser beam is returned to Earth after hitting the reflector, the flight time and can accurately measure the altitude of the satellite, so that the earth different parts of the ground station can know their precise orbital information, cooperation and other ground station can also get the exact distance between the two places, in order to study the effect of different continents when the Earth's plates movement.
LAGEOS orbit satellites flying very stable at high angle is 5900 kilometers 109.8 degrees MEO ( MEO ) in.
capable of determining the position of each point on earth with high accuracy, high quality LAGEOS - area ratio and precise, stable flight, they are extremely plus track rules, making it now the most accurate position reference ground available.
because of appearance characteristics, and the satellite earth completely interacting magnetic fields. It is not an electronic device or sensor, the casing is made of brass plated aluminum.
designers as a time capsule, because the flight is also compact in high orbit, it is not so short-lived near-orbiting satellite; it in accordance with the prediction space flying millions of years, until it burned into the atmosphere after 840 years.
one year ahead of its launch than Voyager, designed to give travelers the gold album Carl Sagan also gave it designed a stainless steel plate, introduced:
- binary code from 1 to 10
- the arrows show the direction of the Earth's orbit Huanri FIG.
- three different maps of the earth, showing the history position continent different periods
this is the first study of a method of measuring earth devoted satellite laser ranging, by which satellites, scientists are able to accurately measure the movement of tectonic plates, and plate movement tracking major anomalies occur. From the perspective of the satellite's orbit can peek out minor deviations from the Earth's gravitational field, such as changes after the earthquake, it can also be explained further impact of near-Earth asteroids orbit after its heating by sunlight.
known, experience days caused massive curved space nearby, LAGEOS reference point can be measured as the earth's rotation axis which swings around and observe the bending space.
launched the first in 1976, 1992 LAGEOS-2 launch, two passive satellite disco ball became public, no one can control it; in the next million years, provide a stable measurement services for researchers plate movement. (Picture from the network, such as the invasion deleted)