See More of NMEA data

The data captured by the GPS receiver is NMEA data. Now we will try to see more familiar with NMEA data. NMEA (National Marine Electronics Association) standard was developed specifically for the industry as an inter-face of a variety of marine equipment introduced since 1983. The standard is awarded to marine equipment that sends information to a computer or other device. Examples of equipment issued is the GPS NMEA data.

NMEA-0183 contains information relating to the geography as about time, longitude, latitude, altitude, speed and many more. To display the information more understandable by users NMEA-0183 data needs to be further processed.
 
NMEA-0183 standard uses a simple ASCII format, each line defines the contents of each type of message that can be sorted out. Five of the first character after the $ sign is called address field. The first two characters in the address referred Talker-ID. After Talker-ID followed behind the 3 characters that describes the type of sentence. While each data separated by a comma, if there are empty fields will not fill in anything between two commas and terminated by a Carriage Return + Line Feed (CR + LF). NMEA-0183 has a variety of sentence types, one of which is the RMC ( Recommended Minimum Navigation Information). Examples of types of RMC NMEA data is as follows:

Name	Sample	Unit	Information
Message ID	$GPRMC		RMC protokol header
UTC Position	065102		hhmmss.ss
Status	A		A=data valid or V=data tidak valid
Latitude	0745.6301		ddmm.mmmm
N/S Indicator	S		N=north or S=south
Longitude	11024.5308		dddmm.mmmm
E/W Indicator	E
Speed Over Ground	000.0	knots
Course Over Ground	066.2	degrees	E=east or W=west
Date	030306		ddmmyy
Magnetic Variation	E	degrees	E=east or W=west
Checksum	*65
CR LF			End of message termination

  more info can be found here

GPS Functionality

GPS or Global Positioning System, is a device or system that can be used to information the user where he is here on satellite-based earth's surface. To be able to identify where a person is given the tools it needs a GPS receiver which receives signals sent from GPS satellites. The position on the change becomes a point known as waypoint. Waypoint in the form of points of latitude and longitude coordinates of the position of a person or a location is then displayed on the screen on an electronic map. Data sent from the satellite in the form of radio signals with digital data. Wherever you are, then the GPS can help indicate the direction, as long as you see the sky. GPS service is available free of charge, did not even need to pay anything except buy a GPS receiver. GPS receiver module shaped and generate NMEA data containing position data. GPS receiver itself contains several integrated circuit (IC) technology is so cheap and easy to use by everyone. Examples of GPS receivers currently on the market is the Garmin 10x. GPS receiver module has the characteristics of the data can only provide information on the position but were unable to send data over long distances. Therefore, we need technology to transmit data remotely through the Internet. The technology is GPRS (General Packet Radio Service).




At present GPS is implemented on many people's lives. For example, use on aircraft, ships, cargo car. In addition, GPS can also be used for the benefit of individuals (personnal tracking systems), for example, used as vehicle tracking.
In general, the use of GPS, among others:

1. Supports the application of GIS (Geographic Information System) includes monitoring (monitoring), tracking (tracking), pemandauan (guidance).
2. GPS as a means of digitizing the earth.
3. GPS function to correlate the data.
4. GPS is an auxiliary device analysis, because the GPS uses information as a key position to analyze, make inferences, or decided.

After experiencing growth, the GPS currently widely used to meet human needs such as:

1. Navigation system in ITS (Intelligent Transport System). This system can be implemented on a police patrol car, train, ambulance, taxi, car delivery (Courrier).
2. As an ocean transportation navigation systems.
3. In the world of the military, GPS is widely used in tracking the troops and equipment. In addition, GPS is widely used in the enemy's reconnaissance forces.
4. GPS is also used in monitoring forest fires.

Garmin 10X