John Deere OMPC20964 - Manual (Page 129)

RTK Base Station Setup
OUO6050,000227C –19–14NOV06–2/2
PC9552
–UN–06NOV06
StarFire iTC - Satellites
A—SkyPlot B—Graph C—PDOP
PDOP operating values should remain BELOW 3.5
DURING ALL AUTOTRAC OPERATIONS, especially
RTK high precision operations. As the value of PDOP
rises above 3.5, position accuracy will be
compromised.
As a rule, when the GPS receiver is warming up from
being in a powered off state and gathering satellite
signals high PDOP values (4 to 20+) will be
experienced for upwards of 15 minutes (under normal
conditions).
It is important to monitor PDOP along with GPS signal
quality while performing field operations.
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