Module gps mod DSIDE_v 0.1

Overview

This extraction module is in charge of extracting geographic information coming from GPS devices that are engaged in the CSPS topology.

Module nomenclature

The module input stream is device-specific. The output streams consist simply in a physical stream that stores geopositions and an integer unitary stream that contains information on GPS signal quality. The following image schematize the module nomenclature :

The x and y component of the physical stream store respectively latitude and longitude in degrees. The z component contains the height above mean sea level in meters. The integer unitary stream stores compacted information on measure reliability such as fix, satellite count and dilution of position.

Module interface

This section gives a summary of the module interface in terms of streams and devices. The order of devices and streams is given as waited by the module. The devices interface is given by :

device( Physical ) Specific GPS reciever

The stream input interface is :

stream( Device specific | GPS ) GPS reciever specific logs

and the stream output interface is :

stream( Physical        | GPS ) Geopositions
stream( Integer unitary | GPS ) Signal quality

The output streams are attached.

Module operation

The module has to know the incoming device type in order to read the provided logs. The GPS extraction module is able to consider the following GPS devices :

• LS20031 GPS reciever