Step 4. Is The Gps Receiver Tracking Satellites; Step 5. Are Base And Rover Tracking At Least 4 Common Satellites - ashtech Z-Xtreme System Manual

Not connected to correct port
Correct inconsistencies between port setting and radio port connection. You
must either connect the radio to the port set in the receiver for receiving raw
base data, or change the port setting in the receiver to match the port to which
the radio is connected. For an internal radio, the port to receive data must be
set to D.
Connected to correct port
Go to step 4 below.

Step 4. Is the GPS receiver tracking satellites?

The rover receiver must track satellites in order to compute it's position. Use either
the front panel of the receiver or the field application software running on the handheld
computer to determine if the rover receiver is tracking satellites.
Not tracking satellites
See GPS receiver does not track satellites under Base System
Troubleshooting above to troubleshoot this problem.
Tracking satellites
Go to step 5 below.

Step 5. Are base and rover tracking at least 4 common satellites?

In order for the rover system to compute an RTK position using both the base satellite
data and rover satellite data, the base and rover receivers must observe data from at
least 4 common healthy satellites simultaneously. Without this common data, the
rover cannot compute an RTK position. Your field application software includes the
ability to inform you of which satellites are being tracked by the base and which are
being tracked by the rover and whether or not these satellites are healthy. Use this
feature to determine if the base and rover are indeed tracking at least 4 common
healthy satellites.
Not tracking 4 satellites
1. Check satellite availability.
a. Use the Mission Planning software to check satellite availability for your
current location and time.
b. Look for the number of satellites available higher than 15° above the
horizon.
c. Ensure at least 4 healthy satellites are available.
85