The specific quality of green laser pointer

It measures the distance of the spacecraft to the surface, according to the spacecraft's position and flight attitude. Calculate the coordinates of surface points. Compared with the ground and airborne laser ranging equipment. Spaceborne laser has many advantages: first of all. Acquiring and processing data on the satellite. Has the ability to observe the entire celestial bodies, contribute to the production of the topographic map of the celestial bodies. Therefore, the moon and Mars exploration program contains a laser altimeter; observation mission carried in the Arctic and other places, available spaceborne laser altimeter observed changes in the Arctic ice and sea ice. We suggest that the customer should wear the goggle of  green laser pointer to protect themselves, especially their eyes.
Therefore. Spaceborne laser altimeter can play an important role in celestial characteristics of the land surface glaciers sea level changes in vegetation distribution, vertical distribution and the optical density of clouds and aerosols, and the monitoring of specific weather phenomena. As early as the 1970s, the laser ranging device in the Apollo moon landing project. Apollo 15, 16 and 17 spacecraft launched between 1971-1972, were equipped with a flashlamp-pumped ruby laser altimeter. However, the life and efficiency of flashlamp-pumped devices greatly limits its application in the space environment. According to reports on the Apollo laser altimeter life expectancy was only 10 pulses.  green laser pointer  can highlight the content.
Aeronautics and Space Administration (NASA) has launched in the 1990s is equipped with the Mars Orbiter Laser Altimeter (MOLA and MOLA-2) of the detector probe to Mars: return laser altimeter satellite launched in 1996 and 1997, respectively. of SLA-01 and SLAs-02, for observation of surface vegetation and other natural features. Later, "to learn the laser altimeter system (the GLAS)" Ice Satellite (ICESat) was launched on January 13, 2003. Its mission is to monitor glaciers, the vertical distribution of density and optical density of suspended particles in the observation clouds, and measure the vegetation distribution and terrestrial terrain. America's "near-Earth asteroid rendezvous detector" (the NEAR) was launched in 1996. When producing, assembling and commissioning  green laser pointer  is performed.
Successfully entered the orbit of Eros asteroid in 2000, close asteroid observational program for a period of one year. The laser range finder as one of the five sets of precision observation system loaded. For the observation of the calculation of the size of Eros and understanding of its density. Laser range finder in the NEAR system mainly consists of five parts: laser with fiber delay and laser power part of the optical receiver part, with the analog circuit of the detector and processor, the digital processing circuits and low voltage power supply. This is the world's first laser range finder to enter the asteroid orbit, continued to work in orbit around the asteroid. The worker performs the production, assembly and commission process of  green laser pointer .
China's recently launched Chang'e One lunar orbiter payload - the Lunar Orbiter Laser Altimeter into space the first set of laser applications. CCD stereo camera, laser altimeter, you can get a three-dimensional images of the lunar surface and terrain elevation data. Chang'e I on the laser altimeter to boot more than two months, has been with the Star around the Moon turned over 720 laps, almost covering the moon twice (including the north and south pole). It is almost one-second intervals to the lunar surface emission laser beam and receives the reflected light, making the interval of more than ten kilometers on the moon "a point, and the resolution is accurate to five meters. On the other hand, the manufacturer should improve the laser technology adopted by   green laser .