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Land mobile radio systems are widely used by the military. Separate bands in the radio spectrum are reserved for their use. This includes portions of the 30-50 MHz band, and the entire 100-100, 100-100.8, and 540-2400 MHz bands, plus shared use of the 170- 170 MHz band.
Civil Air Patrol was created on December 1, 1941. [5] In Florida, the First Air Squadron was reorganized as a Civil Air Patrol unit. By early January 1942, Florida wing was organized into seven different operation groups, each with a commander and staff. [6]
In May of that year, the Air Force consolidated the three centers into one facility at Scott Air Force Base, Illinois. This provided better coordination of activities, improved communications and economy of operations, and standardized procedures. The newly formed center permitted operations with fewer people, while creating a more experienced ...
Repeaters are found mainly in the VHF 6-meter (50–54 MHz), 2-meter (144–148 MHz), 1.25-meter band (1 1 ⁄ 4 meters) (220–225 MHz) and the UHF 70 centimeter (420–450 MHz) bands, but can be used on almost any frequency pair above 28 MHz. In some areas, 33 centimeters (902–928 MHz) and 23 centimeters (1.24–1.3 GHz) are also used for ...
The program's name was changed to the Military Affiliate Radio System on 2 September 1952, in recognition of the organization's changing nature with the growing number of civilian volunteer members. Eventually, the Navy - Marine Corps MARS program was established officially on 17 August 1962, and began operations on 1 January 1963.
StarCom21 is a statewide public safety trunked radio system in Illinois. Owned and operated by Motorola Solutions , the State of Illinois is a major partner in the system. It is used by all Illinois State Police posts and the Illinois State Toll Highway Authority (ISTHA) Maintenance and Police divisions.
Courier 1B, is the world's first active repeater communications satellite, Courier 1B was successfully launched on October 4, 1960 at 17:45:00 GMT from Cape Canaveral, Florida. The first Courier satellite in Project Courier, Courier 1A , was lost 2.5 minutes after lift-off on August 18, 1960.
TD-2 was a microwave relay system developed by Bell Labs and used by AT&T to build a cross-country network of repeaters for telephone and television transmission. The same system was also used to build the Canadian Trans-Canada Skyway system by Bell Canada , and later, many other companies in many countries to build similar networks for both ...