1
edit
Global Positioning System: Difference between revisions
From ScoutWiki, For Everyone, Everywhere involved with Scouting and Guiding...
Added blog article as source for 'GPS Tracking'
m (r2.7.4) (Robot: Adding es:GPS) |
(Added blog article as source for 'GPS Tracking') |
||
| Line 219: | Line 219: | ||
*'''Heading information''' — The GPS system can be used to determine heading information, even though it was not designed for this purpose. A "GPS compass" uses a pair of antennas separated by about 50 cm to detect the phase difference in the carrier signal from a particular GPS satellite.<ref>[http://www.jrcamerica.com/product.asp?Product_Id=17778 ''JLR-10 GPS Compass'']. Accessed Jan. 6, 2007.</ref> Given the positions of the satellite, the position of the antenna, and the phase difference, the orientation of the two antennas can be computed. More expensive GPS compass systems use three antennas in a triangle to get three separate readings with respect to each satellite. A GPS compass is not subject to magnetic declination as a magnetic compass is, and doesn't need to be reset periodically like a gyrocompass. It is, however, subject to multipath effects. | *'''Heading information''' — The GPS system can be used to determine heading information, even though it was not designed for this purpose. A "GPS compass" uses a pair of antennas separated by about 50 cm to detect the phase difference in the carrier signal from a particular GPS satellite.<ref>[http://www.jrcamerica.com/product.asp?Product_Id=17778 ''JLR-10 GPS Compass'']. Accessed Jan. 6, 2007.</ref> Given the positions of the satellite, the position of the antenna, and the phase difference, the orientation of the two antennas can be computed. More expensive GPS compass systems use three antennas in a triangle to get three separate readings with respect to each satellite. A GPS compass is not subject to magnetic declination as a magnetic compass is, and doesn't need to be reset periodically like a gyrocompass. It is, however, subject to multipath effects. | ||
*'''[[GPS tracking]]''' systems use GPS to determine the location of a vehicle, person, or pet and to record the position at regular intervals in order to create a log of movements. The data can be stored inside the unit, or sent to a remote computer by radio or cellular modem. Some systems allow the location to be viewed in [[real-time]] on the Internet with a web-browser. | *'''[[GPS tracking]]''' systems use GPS to determine the location of a vehicle, person, or pet and to record the position at regular intervals in order to create a log of movements. The data can be stored inside the unit, or sent to a remote computer by radio or cellular modem. Some systems allow the location to be viewed in [[real-time]] on the Internet with a web-browser. There are various applications for GPS tracking, namely in public safety and crime prevention.<ref>''[http://gpstrackit.com/gps-tracking-the-future/ GPS Tracking: The Future]''</ref> | ||
*'''Weather Prediction Improvements''' — Measurement of atmospheric bending of GPS satellite signals by specialized GPS receivers in orbital satellites can be used to determine atmospheric conditions such as air density, temperature, moisture and electron density. Such information from a set of six micro-satellites, launched in April 2006, called the Constellation of Observing System for Meteorology, Ionosphere and Climate [[COSMIC]] has been proven to improve the accuracy of weather prediction models. | *'''Weather Prediction Improvements''' — Measurement of atmospheric bending of GPS satellite signals by specialized GPS receivers in orbital satellites can be used to determine atmospheric conditions such as air density, temperature, moisture and electron density. Such information from a set of six micro-satellites, launched in April 2006, called the Constellation of Observing System for Meteorology, Ionosphere and Climate [[COSMIC]] has been proven to improve the accuracy of weather prediction models. | ||
