{"id":1305,"date":"2015-06-18T06:50:51","date_gmt":"2015-06-18T06:50:51","guid":{"rendered":"http:\/\/biomedpharmajournal.org\/?p=1305"},"modified":"2020-04-25T02:40:08","modified_gmt":"2020-04-25T02:40:08","slug":"virtual-gps-simulation-using-rf-transmission","status":"publish","type":"post","link":"https:\/\/biomedpharmajournal.org\/staging\/vol8no1\/virtual-gps-simulation-using-rf-transmission\/","title":{"rendered":"Virtual GPS Simulation Using RF Transmission"},"content":{"rendered":"

Introduction:<\/strong><\/p>\n

Global Positioning System (GPS)is a navigation system based on satellite that provides location information across the earth where there is a line of sight to four or more GPS satellites, the GPS technology is used for military, commercially and civil applications. The GPS device uses a mathematical concept of trilateration, in which the device asks for at least a minimum of 3 satellites data to give the precise location information. To understand a GPS simulator working, it is required to understand some of the details of working of the GPS transmissions and the transmission frame format. The GPS system be consistent with of at least 24 satellites, encircling every 12 hours, broadcasting navigation data on various frequencies. GPS is just one of distinct global navigation satellite systems (GNSS) in action, or soon to be in movement. Almost all the applications on navigation currently use the \u00a0L1 frequency of GPS at the radio frequency of 1575.42 MHz onto this carrier frequency, satellites transmit a navigation message and identification information that involved synchronized time, the satellite\u2019s recurring data (ephemeris) and data on the familiar positions of all the satellites in the circumstances. From this data that receivers can accurately measure its distance from various satellite signals at the same time to attain its navigation solution through trilateration.<\/p>\n

Data transmitted from the satellite:<\/strong><\/p>\n