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SPOT Satellite Messenger. SPOT is a GPS tracking device that uses the Globalstar satellite network [1] to provide text messaging and GPS tracking (depending on the subscription type purchased). [2] [3] It has a coverage area that includes a large portion of the planet, with the exception of extreme northern and southern latitudes and parts of ...
A Satellite Emergency Notification Device or SEND is a portable emergency notification and locating device which uses commercial satellite systems rather than the COSPAS-SARSAT satellite system. An example of this device is SPOT. The devices use an internal GPS chip to gather location information. When the SEND is triggered, this information is ...
The word "lol" sent via iMessage. Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops / laptops, or another type of compatible computer. Text messages may be sent over a cellular network or may also ...
Laser communication in space. A diagram showing two solar-powered satellites communicating optically in space via lasers. Laser communication in space is the use of free-space optical communication in outer space. Communication may be fully in space (an inter-satellite laser link) or in a ground-to-satellite or satellite-to-ground application.
Satellite phone ( Inmarsat) in use in Nias, Indonesia, in April 2005 after the Nias–Simeulue earthquake. A satellite telephone, satellite phone or satphone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do.
The week number is transmitted as a ten-bit field in the C/A and P(Y) navigation messages, and so it becomes zero again every 1,024 weeks (19.6 years). GPS week zero started at 00:00:00 UTC (00:00:19 TAI) on January 6, 1980, and the week number became zero again for the first time at 23:59:47 UTC on August 21, 1999 (00:00:19 TAI on August 22 ...
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