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Minimum observation time
300 s
30 s
3 s
0 km
10 km
GNSS Antennas and Antenna Heights
GNSS Antenna
Features
Observation Time Charts:
Dual-Frequency
Receivers
Baseline
length
20 km
Not surprisingly, the minimum observation times in post-
processed surveys are roughly equal to the TTFF's in real-time
surveys, for the same type of equipment, baseline and
initialization methods.
For single-frequency receivers using the initializer bar
(baseline length: 20 cm), the minimum observation time is
about 60 seconds.
The figure below represents a generic GNSS antenna showing
the features that are critical to precise surveying.
Minimum observation time
50 min
5 min
Single-Frequency
0.5 min
0 km
10 km
1
5
6
Precise Surveying - Field Applications & Concepts
Receivers
Baseline
length
20 km
3
4
2
313
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