Gps; Function Summary - Casio IT-G500 Series Software Manual

2.17 GPS

These communications services are used on models equipped with WHE6.5 Pro.

2.17.1 Function summary

Latitude and longitude data are obtained using independent positioning and A-GPS.
(1) GPS functions specifications
Item
Positioning Independent positioning
method
A-GPS positioning
Positioning With reception from 4 or more
status satellites: 3D positioning
With reception from 3 satellites:
2D positioning
Output NMEA－0183
format
Geodetic WGS84
system
[A-GPS function]
This function links with cellphone base stations to perform GPS positioning processes. There are
the following 2 modes.
i MS-based
In this mode, the terminal gets data such as Ephemeris Data and Almanac Data from base
stations to perform positioning.
ii MS-assisted
In this mode, the base station performs positioning on the basis of GPS wave information
received by the terminal.
Also, there are the following two types of communication with cellphone base stations.
ⅰ C-Plane: The control signal channel of the cellphone is used for communication.
ⅱ U-Plane (SUPL): The IP address of the cellular network is used for communication.
A-GPS functions are supplementary to GPS functions, and cannot provide positioning where there
is no GPS wave reception.
(2) A-GPS support by each model
Model
IT-G500
(Overseas model)
Specification
MS-based MS-based
C-Plane SUPL
Can be set Can be set
110
Description
Module unit receives GPS radio waves and
performs positioning
GPS positioning uses the support of cellphone
base stations.
Positioning cannot be performed with 2 or
fewer receivable satellites
This is the standardized output format of the
National Marine Electronics Association, and is
the standard format used with GPS.
MS-assisted
C-Plane
Can be set
MS-assisted
SUPL
Can be set