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GPS ialah ground base antennas

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Post time 2018-5-8 11:19:03 | Show all posts |Read mode
smartphone , bila off line, bolehkah dapat coordinat tempat ?   ya , boleh

smartphone atau alat eletrik lain seperti garmin GPSmap , ia bfungsi sebagai receiver ,  dan tower transmitter  

pakai smartphone sbg contoh
biar phone tanpa guna simkad , buka app yg bkaitan (app gps) , ia juga dapat tentukan kedudukan ,  
simkad hanya utk kamu call atau binternet , ia tidak ganggu bfungsi sebagai receiver

sebab kamu buka software itu utk menerima signal , dgn syarat kws itu masih di kws signal tower .








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GPS perlu 3 tower (masts) utk kesan kedudukan kamu .

lebih byk tower lebih tepat .

tower - boleh sekali dgn telefon tower , ada GPS ada telefon signal ,

jenis2 Trilateration dan Triangulation utk tentukan kedudukan kamu   credit kpd philipstallings.com

Trilateration
https://en.wikipedia.org/wiki/Trilateration

The point is this: "trilateration" is basically using 3 points of references to establish someone's location. Triangulation is doing the same thing but in respect to towers.

Trilateration, in geometry, is the process of determining or relative locations of points by measurement of distances, using the geometry of circles, spheres or triangles and is the “basis” of GPS.

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https://en.wikipedia.org/wiki/Triangulation


Triangulation, in trigonometry and geometry, is the process of determining the location of a point by measuring angles to it from known points at either end of a fixed baseline, rather than measuring distances to the point directly (trilateration).

Trilateration, which uses measurements of distances, and triangulation, which uses measurements of angles are both used in determining ones location and implement ground-based technology.


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