GPS Tracking Device provide an amazing amount of information
A Global Positioning System (GPS) is a group of 24 earth-orbiting satellites, providing location and time in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS Satellites. This system of satellite can work in any weather condition, operate 24/7/365 and travel at roughly 7,000 miles an hour. A GPS receiver uses a triangular calculation to pinpoint a user’s exact location buy comparing the time a signal was transmitted with the time it was received by a satellite.
The control segment of GPS ( GPS tracking device ) consists of a master control station (MCS), a worldwide network of monitor stations, and ground control stations. The MCS, located near Colorado Springs, Colorado, is the central processing facility of the control segment and is manned at all times. There are five monitor stations, located in Colorado Springs (with the MCS), Hawaii, Kwajalein, Diego Garcia, and Ascension Island. The positions (or coordinates) of these monitor stations are known very precisely.
Each monitor station is equipped with high-quality GPS receivers and a cesium oscillator for the purpose of continuous tracking of all the GPS satellites in view. Three of the monitor stations (Kwajalein, Diego Garcia, and Ascension Island) are also equipped with ground antennas for uploading the information to the GPS satellites. All of the monitor stations and the ground control stations are unmanned and operated remotely from the MCS.
The GPS observations collected at the monitor stations are transmitted to the MCS for processing. The outcome of the processing is predicted satellite navigation data that includes, along with other information, the satellite positions as a function of time, the satellite clock parameters, atmospheric data, satellite almanac, and others. This fresh navigation data is sent to one of the ground control stations to upload it to the GPS satellites through the S-band link. Monitoring the GPS system integrity is also one of the tasks of the MCS. The status of a satellite is set to unhealthy condition by the MCS during satellite maintenance or outages. This satellite health condition appears as a part of the satellite navigation message on a near real-time basis. Scheduled satellite maintenance or outage is reported in a message called Notice Advisory to Navstar Users (NANU), which is available to the public through, for example, the U.S. Coast Guard Navigation Center.
Electronic tracker provide an amazing amount of information. They come loaded with many navigation features, maps, tide data and much more, but nothing is more important than position data and the direction to a waypoint. Much of land navigation is based on the relationship to the North Pole; also known as “true north. The measure of degrees of direction in relation to true north is called “degrees true.” Maps are laid out in degrees true. Land features (buttes, mountains, streams) on a topographic map are in reference to degrees true. By that I mean the bearing from one mountain peak to another will be referenced in degrees true. The issue is that the magnetic compass’s direction information is in degrees magnetic. The angular measurement between degrees true and degrees magnetic is called declination. The hiker will need to compensate for declination.
In the Navy I learned to keep my navigation simple. In the Navy during a bridge watch, I evaluated the ship’s position on a navigation chart. The principle navigation compass (a gyro repeater) reported in degrees true; the backup compass reported in degrees magnetic. Key to this navigation was the both the principle navigation compass and chart used degrees true. The hiker can select either degrees true or degrees magnetic. It is a matter of personal preference; a choice.
More information about GPS tracking solutions at http://www.jimilab.com/ .
The control segment of GPS ( GPS tracking device ) consists of a master control station (MCS), a worldwide network of monitor stations, and ground control stations. The MCS, located near Colorado Springs, Colorado, is the central processing facility of the control segment and is manned at all times. There are five monitor stations, located in Colorado Springs (with the MCS), Hawaii, Kwajalein, Diego Garcia, and Ascension Island. The positions (or coordinates) of these monitor stations are known very precisely.
Each monitor station is equipped with high-quality GPS receivers and a cesium oscillator for the purpose of continuous tracking of all the GPS satellites in view. Three of the monitor stations (Kwajalein, Diego Garcia, and Ascension Island) are also equipped with ground antennas for uploading the information to the GPS satellites. All of the monitor stations and the ground control stations are unmanned and operated remotely from the MCS.
The GPS observations collected at the monitor stations are transmitted to the MCS for processing. The outcome of the processing is predicted satellite navigation data that includes, along with other information, the satellite positions as a function of time, the satellite clock parameters, atmospheric data, satellite almanac, and others. This fresh navigation data is sent to one of the ground control stations to upload it to the GPS satellites through the S-band link. Monitoring the GPS system integrity is also one of the tasks of the MCS. The status of a satellite is set to unhealthy condition by the MCS during satellite maintenance or outages. This satellite health condition appears as a part of the satellite navigation message on a near real-time basis. Scheduled satellite maintenance or outage is reported in a message called Notice Advisory to Navstar Users (NANU), which is available to the public through, for example, the U.S. Coast Guard Navigation Center.
Electronic tracker provide an amazing amount of information. They come loaded with many navigation features, maps, tide data and much more, but nothing is more important than position data and the direction to a waypoint. Much of land navigation is based on the relationship to the North Pole; also known as “true north. The measure of degrees of direction in relation to true north is called “degrees true.” Maps are laid out in degrees true. Land features (buttes, mountains, streams) on a topographic map are in reference to degrees true. By that I mean the bearing from one mountain peak to another will be referenced in degrees true. The issue is that the magnetic compass’s direction information is in degrees magnetic. The angular measurement between degrees true and degrees magnetic is called declination. The hiker will need to compensate for declination.
In the Navy I learned to keep my navigation simple. In the Navy during a bridge watch, I evaluated the ship’s position on a navigation chart. The principle navigation compass (a gyro repeater) reported in degrees true; the backup compass reported in degrees magnetic. Key to this navigation was the both the principle navigation compass and chart used degrees true. The hiker can select either degrees true or degrees magnetic. It is a matter of personal preference; a choice.
More information about GPS tracking solutions at http://www.jimilab.com/ .
Comments
Post a Comment