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Chapter 13. RTK Implementation
Data Link
Key Terms and
Expressions
In an RTK surveying system, the data link is used to transfer
RTK correction data from the base to the rover.
The data link may be one of the following two types:
• Standalone: You will have full control over the generation
and transmission of RTK correction data (Magellan
equipment used in base/rover configuration).
• Network-based: You will be resorting to a third-party,
network-based provider for the generation and delivery of
RTK correction data (Magellan equipment used in rover-
only configuration)
This section introduces the two basic transmission means
available in Magellan surveying systems for setting up this
data link:
• Radio (standalone)
• Cellular mobile communications (cell phone, cellular
modem).
For mobile communications, this section describes the
different operating modes available:
• CSD (standalone)
• NTRIP (network-based)
• Direct IP (network-based).
Age of Corrections: The age of corrections is measured as the
time elapsed between the time corrections are generated in a
base and the time when they are effectively used to yield an
RTK position in a rover. Generally speaking, the quality of
corrections decreases as their age increases.
CDMA: A standard for mobile communications based on
CDMA (Code Division Multiple Access) technology. CDMA is
mostly found in the United States, Canada, and North and
South Korea.
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