Manual:System/GPS: Difference between revisions

Revision as of 05:28, 2 September 2011

Applies to RouterOS: v3, v4, v5 +

Sub-menu: /system gps
Standards: GPS, NMEA 0183, Simple Text Output Protocol

Global Positioning System (GPS) is used for determining precise location of a GPS receiver.

Property	Description
(string; Default: <>)
(string; Default: "")

Note: .

This command is used for monitoring the data received from a GPS receiver

Pparameters:

@@ Line 11: / Line 11: @@
 </p>
-Global Positioning System (GPS) is used for determining precise location of a GPS receiver. There are two types of GPS service:
+Global Positioning System (GPS) is used for determining precise location of a GPS receiver.
-* Precise Positioning Service (PPS) used by military. Its accuracy is 22m horizontally, 27.7m vertically and 200ns of time
-* Standard Positioning Service (SPS) used by civil users worldwide without charge or restrictions except that SPS accuracy is intentionally degraded to 100m horizontally, 156m vertically and 340ns of time
-GPS system is based on 24 satellites rotating on 6 different orbital planes with 12h orbital period. It makes that at least 5, but usually 6 or more satellites are visible at any time anywhere on the Earth. GPS receiver calculates more or less precise position (latitude, longitude and altitude) and time based on signals received from 4 satellites (three are used to determine position and fourth is used to correct time), which are broadcasting their current positions and UTC time.
-Precise time is mainly intended to be used by built-in NTP server, which can use it as a time source without any additional configuration if GPS is configured to set system time.
 ==Properties==