Select Appropriate Base System Site; Figure 4.2 Base Transport Case, Kit Opened - ashtech Z-Xtreme System Manual

The larger of the two bags is referred to as the Kit bag. It contains the Z-Xtreme
receiver, GPS antenna, external power supply, and some cables, as shown in Figure
4.2. There is additional room in the Kit bag for miscellaneous items such as a tribrach
and tribrach adaptor. The second smaller bag is referred to as the Accessories bag.
It will contain the base radio, radio antenna, radio specific cables, and possibly the HI
measurement device (this could be located in either bag). The Kit bag includes shoul-
der straps in order to use it as a backpack. This is useful in the situation where a
short hike is required to access the base station site.

Figure 4.2 Base Transport Case, Kit Opened

Prior to departing for field work, it is recommended that the base system is examined
to ensure that all required components are indeed in the transport case.
Now that we have confirmed that all required base system components are accounted
for, let's take the system out into the field. Below are the steps required to success-
fully set up your RTK base system:

Select Appropriate Base System Site

Selection of a proper site to place the base system is crucial to a successful RTK sur-
vey. There are two main considerations when selecting a site:
1. The site should be clear of any line-of-sight obstructions between the base
system GPS antenna and the satellites. This implies there be no obstructions
above 15° from the horizon. Although some obstruction can be tolerated at
50 Real-Time Kinematic Surveying