Base Station Radio Modem Rtk Corrections; Vents; Raim - Advanced Navigation Spatial Dual Reference Manual

10.12.3

Base station radio modem RTK corrections

Illustration 24: Trimble
R4 base station
Base station radio modem RTK corrections require two additional pieces of hardware,
these are the base station and the radio modem receiver. The base station is setup at
a fixed location and transmits corrections to the radio modem receiver that is
connected to the mobile Spatial Dual unit. The radio modem receiver and Spatial Dual
unit must remain within range of the base station to receive these corrections,
typically this range is approximately 20km. Advanced Navigation recommends the
Trimble R4 base station combined with the Trimble TDL 450L radio modem. Please
contact your local Trimble dealer for more information and pricing.
10.13

Vents

Spatial Dual contains a sophisticated venting system that allows it to measure air
pressure whilst keeping water out. There are two sets of vent holes on either side of
the enclosure. It is very important that these remain clean and clear of debris. Should
debris get into the vents they should be rinsed with fresh water. Foreign bodies should
never be poked into the vent holes, this will break the environmental seal and void the
warranty on the unit.
10.14

RAIM

RAIM stands for receiver autonomous integrity monitoring. It allows a GNSS receiver to
detect and exclude both faulty and fraudulent satellite signals. Spatial Dual's internal
GNSS is equipped with RAIM and it is enabled by default.
Spatial Dual Reference Manual
Page 49 of 137
Version 2.3
12/04/2016
Illustration 25:
Trimble TDL
450L radio
modem