GPS HELIX COIL ANTENNA – L1 BAND 1575.42Hz TRIMBLE GEO XH Made of PVC and zinc coated copper wire. Ground Plane was water jet cut into a perfect circle from steel. All measurements were completed to precision of roughly .01mm using a digital caliper. Ground Plane center was located and tapped, subsequent exit of the RG-58 cable was reamed at the center. Pitch of coil was calulated and verified, and coil position was retained using epoxy and tiny identions to provide the epoxy a cavity to adhere to. Gain of this high profile helix is more than twice of the internal antenna used in this test. The connection between the antenna and device was low loss and less than 6ft. The test was to verify gain or loss in accuracy from the standard internal antenna, future tests will be compared to commercial grade external antennas. Accuracy benchmark was data obtained by NGS for a known point AW0326. For any specific questions or comments: amiraghajani@att.net
In november 2002, several institutes completed GNSS-EGNOS tests at Sion (Switzerland). The idea was to improve the IFR approaches and take offs. The organs who participated in the tests were Skyguide, Eurocontrol, the technical university of Braunschweig (Germany) and some students of the Swiss federal institute of technology of Lausanne.
Watch tips for purchasing a GPS navigation system with expert computer technology tips in this free travel directions video clip. Expert: Rick Kennedy Bio: Rick has 15 yrs of computer & internet training & experience and is also a web designer. He has owned a cell phone & beeper shop for 5 years & worked with all types of phones as a service technician. Filmmaker: Richard Kennedy
www.choice.com.au Find out how CHOICE – Australia’s not-for-profit consumer group – tests GPS car navigation systems.
or is this something that might come in the future?