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2. SPOT Satellite Messenger - Wikipedia

   en.wikipedia.org/wiki/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 the Pacific Ocean. [4]

3. GPS signals - Wikipedia

   en.wikipedia.org/wiki/GPS_signals

   GPS encodes this information into the navigation message and modulates it onto both the C/A and P(Y) ranging codes at 50 bit/s. The navigation message format described in this section is called LNAV data (for legacy navigation). The navigation message conveys information of three types: The GPS date and time, and the satellite's status.

4. GPS tracking unit - Wikipedia

   en.wikipedia.org/wiki/GPS_tracking_unit

   GPS antenna size limits tracker size, often smaller than a half-dollar (diameter 30.61 mm). In 2020 tracking is a $2 billion business plus military-in the gulf war 10% or more targets used trackers. Virtually every cellphone tracks its movements. Tracks can be map displayed in real time, using GPS tracking software and devices with GPS ...

5. Cellphone surveillance - Wikipedia

   en.wikipedia.org/wiki/Cellphone_surveillance

   Cellphone surveillance (also known as cellphone spying) may involve tracking, bugging, monitoring, eavesdropping, and recording conversations and text messages on mobile phones. [1] It also encompasses the monitoring of people's movements, which can be tracked using mobile phone signals when phones are turned on. [2]

6. Mobile phone tracking - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone_tracking

   An indoor location tracking map on a mobile phone. Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. . Localization may be affected by a number of technologies, such as the multilateration of radio signals between (several) cell towers of the network and the phone or by simply

7. Satellite emergency notification device - Wikipedia

   en.wikipedia.org/wiki/Satellite_emergency...

   Additional features are increasingly being offered: sending preprogrammed messages, breadcrumb tracking via Google Earth. Some newer devices offer two-way communication via satellite, for example Garmin's inReach Communicator, the Yellowbrick 3 Messenger/Tracker, [1] and the Somewear Global Hotspot.