Figure 2.4 Gps Antenna Module - Thales Z-Max Operation And Application Manual

The Z-Max GPS Receiver Module is a 12-channel, dual-frequency receiver. The
receiver has a removable SD memory card for internal data storage and is
designed to run on about 4 watts of power to maximize the amount of
uninterrupted time that the receiver can be operated in the field. The receiver is
capable of functioning as the base or the rover receiver in both RTK and post-
processed surveys. The integrated Front Panel User Interface includes the ability
to configure RTK base and rover receivers and to perform basic survey tasks
without the use of a handheld computer. Most users will find the handheld
computer to be more convenient for configuring and executing RTK surveys.
Z-Max GPS Antenna Module
In order for the GPS receiver to receive satellite signals, it must be connected to a
GPS antenna. The GPS Antenna Module is precise and sensitive device used to
receive satellite signals (Figure 2.4). It is designed to attach securely to the
receiver without cables.

Figure 2.4 GPS Antenna Module

The GPS receiver antenna is the actual collection point of the satellite signals. It is
also the point where the position of the rover system is computed. To determine
the location of a point on the ground, the rover GPS receiver antenna must be
centered and leveled over this point. The horizontal position of the feature is
determined by the location of the center of the antenna. The vertical position of
the feature is determined by the location of the center of the antenna minus the
known height of the antenna above the point. The known height is called the
antenna height or the antenna HI (height of instrument).
System Components 163