Table of Contents
Advertisement
Observation times
136
Field
Option
<Antenna
User input
Ht:>
<3D CQ:>
Output
Next step
PAGE (F6) changes to another page on this screen.
Observation times depend on
•
Baseline length
•
Number of satellites
Observation times for dual frequency receivers
The following table is an approximate guide as it is impossible to quote observation
times that can be fully guaranteed. The quoted observation times are based on tests
in mid-latitudes under normal ionospheric disturbance with a dual frequency
receiver.
Observation
Minimum
method
number of satel-
lites, GDOP < 8
Static
4
4
Observation times for single frequency receivers
Providing recommendations for required observation times is more difficult for single
frequency receivers than for dual frequency receivers. The following table is an
approximate guide since it is impossible to quote observation times that can be fully
guaranteed. A minimum of five satellites above 15° and a GDOP < 8 must be avail-
able.
As a rule of thumb the baseline observation time should be 5 min per km of the base-
line length with a minimum time of 15 min.
Baseline length [km] 1
Approximate obser-
vation time [min]
Description
•
For an individual point ID independent of the
ID template SHIFT INDIV (F5). SHIFT RUN
(F5) changes back to the next free ID from
the configured ID template.
The default antenna height as defined in the
active configuration set is suggested.
Changing the antenna height here does not
update the default antenna height as defined in
the active configuration set.
The current 3D coordinate quality of the
computed position.
•
Satellite geometry, GDOP
•
Ionosphere. Refer to "Ionospheric disturbance".
Baseline length
[km]
15 - 30
> 30
2
3
4
15
15
15
20
GPS1200+
Approximate observa-
tion time [min]
10 - 15
30 - 60
5
6
7
8
9
25
30
35
40
45
Survey - General
10
> 10
50
> 60
Advertisement
Table of Contents
