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Laser satellite communications program in the U.S. Department of Defense Defense Defense Program (DSP) laser communications system plan (LCS). The investment by the U.S. Air Force, eight devices developed by the McDonald Douglas, and the establishment of horizontal synchronous orbit (GEO) communications network. The entire system transmission rate is relatively low (about 1Mbps). The device has been assembled, but did not launch the LCS in 1993 was canceled. Another laser of the U.S. Department of Defense satellite communications plan is implemented by the McDonald Douglas, began called boost-level tracking system (BSTS), and later the Air Force was renamed the track for the early warning system (FEWS), the scheme is also 1993 The end of the year was canceled. This kind of Laser Pointers is very popular and well received in the recent market for its high practice degree in the actual application.
Strategic Missile Defense Organization (BMDO) is the U.S. Army Space and Strategic Command Ministry under the leadership of the development of a laser communications terminal equipment. Engineering test model has been developed, and put them between the two apart 42km mountain, the signal transmission rate of 1Gbps, the error rate is less than 10-6, and was tested in all weather, verify that both The device meets the design requirements, the Army also plans to air test the end of the 1990s. In addition, BDM is also preparing to build two similar space laser communications equipment, a plan for the BMDO's STRV2 test launch in 1998. With the first generation of Tracking and Data Relay Satellite System (TDRSS) and put into use. At the same time this kind of 300mw green laser pointer has the strict parameters and perfect design and technology.
The optical space communications in the United States has entered a new phase. For the first generation of tracking data relay satellite communication bandwidth and by the star's body structure and therefore can not install too much tracking antenna shortcomings, the second-generation tracking and data relay satellite program envisages the laser inter-satellite link (ISLs), namely the use of laser inter-satellite targeting, acquisition, tracking and communication. This will greatly increase the communications capacity, to improve the accuracy of measuring angle tracking antenna, significantly narrowed the size of the transmitting antenna, thereby greatly enhancing the functionality of the relay satellite. There is no doubt, ISL will relay satellite to reach a new level. Second-generation relay satellite put into use in 2000. It is the brilliant technology of 300mw green laser pointer.
Optical space communications has also accelerated the pace, using the wavelength of semiconductor lasers in the 8 × 10-7m space optical communications terminal equipment development work is nearing completion. The quality of this optical space communications transceiver equipment is less than 115kg, the power required is less than 200W, the average transmit power of 50mW and 200mW peak transmit power. The European Space Agency (ESA) has always attached importance to the study of optical space communications. ESA optical space communications research not only an early start, and formulated a series of research programs carried out step by step, thorough and detailed study of the technology in nearly two decades. 1977 ESA began the study of ISL, and formulated a series of phased research program. For the customer to determine and judge whether 300mw green laser pointer is good enough.
TRP plan for basic technology research and long-distance communication preparedness plan (TPP), the optical space communications systems and technology research ASTP program and implementation the PSDE plan of the payload and simulation and experimental during 1987-1992, for Europe Space Agency For Data Relay Satellite (DRS) plans to install the optical space communication system, data relay preparedness plan (DRPP) in 1987-1995. Since 1989, ESA began to implement semiconductor inter-satellite laser link experiment (SILEX) program, the implementation of this plan to the development of the optical space communication system components, as well as practical before a space experiment to test the optical space communication system the performance. Different technologies 300mw green laser pointer adopts will make the laser pointer have different functions.