haku: @author Marek, S. / yhteensä: 11
viite: 9 / 11
Tekijä: | Marek, S. |
Otsikko: | Keeping Track of GPS |
Lehti: | Satellite Communications
1992 : JULY, p.28-30 |
Asiasana: | |
Vapaa asiasana: | Location information, Applications, Drawbacks |
Kieli: | eng |
Tiivistelmä: | Global Positioning System (GPS) is based on satellite ranging-determining positions on the earth by measuring how far they are from satellites. With a GPS receiver, users receive signals from four or more satellites. Vehicle tracking is just one emerging application for GPS technology. Location and navigation information is essential to a broad range of activities, including boating, surveying, aviation and defence. But there are some drawbacks to the technology, GPS signals may lose in certain areas. |
SCIMA