10
GPS overview
The basics
WAAS is a free service of the FAA that allows regular GPS positions to be improved to a DGPS level of
accuracy. Tests using a IsoMatch Global GPS antenna have shown better than one -meter accuracy.
WAAS is available everywhere in the U.S., including Alaska, Hawaii and Puerto Rico. It can also be picked
up in some of the border areas of Mexico and Canada. There are no subscription charges incurred when
using WAAS. EGNOS is a similar service that is available in Europe and Western Russia.
Automatic SBAS tracking
The IsoMatch Global GPS antenna will automatically scan and track the satellite signals. This automatic
tracking allows you to focus on other aspects of differential operation without the need to tune the re-
ceiver. The IsoMatch Global GPS antenna features two-channel SBAS tracking that provides an en-
hanced ability to maintain a lock on a SBAS satellite when more than one satellite is in view. This
redundant tracking approach results in more consistent tracking of a SBAS signal when in an area
where signal blockage of a satellite is possible.
Содержание IsoMatch Global
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