Spectra Precision ProMark 800 Reference Manual - Manual (Page 102)

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RTK Implementation
In the above Fast RTK mode example, the output rate has
been set to twice the base data output rate.
Whereas the Time-Tagged mode can only stick to the base
data output rate, the Fast RTK mode on the other hand can
continue to deliver its positions at an unaffected output rate.
The only difference, when a base data epoch is missing, is
that the last received RTK correction data is extrapolated for
a longer time to produce up to four positions (instead of two).
In Time-Tagged RTK
In Fast RTK
Epoch1 Epoch2
Pos1
Pos1
Pos2 Pos3
Pos2
Pos4 Pos5 Pos6
Base Data
Availability
RTK Position
Output
(Rover)
Base Data
Availability
RTK Position
Output
(Rover)
Epoch3
Epoch1 Epoch2
Epoch3
All extrapolated
from Epoch1
Extrapolated
from Epoch3
No position output
Extrapolated
from Epoch0