TeeJet RX370p - Manual (Page 15)

11
RX370P
98-05106 R1
The Basics
WAAS is a free services of the FAA that allows regular GPS positions to be improved to a DGPS level of accuracy.
Tests using an RX370p have shown better than 3 ft (1 m) accuracy. WAAS is available everywhere in the United
States, 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 RX370p will automatically scan and track the satellite signals. This automatic tracking allows the operator to
focus on other aspects of differential operation without the need to tune the receiver. The RX370p features
two-channel SBAS tracking that provides an enhanced 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 an SBAS
signal when in an area where signal blockage of a satellite is possible.
e-Dif
An RX370p that is equipped with e-Dif capabilities can operate anywhere in the world where normal GPS
signals can be viewed. e-Dif can be used anywhere on the globe where a GPS lock can be achieved. e-Dif was
developed for customers who are not able to receive other types of differential signals due to location or budget.
e-Dif requires a subscription. Once the e-Dif capable RX370p computes a differential correction, the user can
operate for unlimited time and provide good relative accuracy. Alternatively, the operator can regularly update
e-Dif to maintain absolute accuracy (typically less than 3 ft (1 m) over 40 minutes).