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Reliance with FS/2 Field Operations Manual
Table 2.3 lists the published accuracies.
Reliance Precision System
In order to achieve accuracies as good as 1 cm, the Reliance Processor resolves
inherent ambiguities in the carrier phase measurements made by the receiver. This
sensitive process requires that certain minimum criteria be met. At least five satellites
common to base and remote receivers must be tracked continuously for a minimum of
30 minutes. The base and rover receivers must remain static (no movement) for the
duration of each cm occupancy. The geometric distribution of the satellites
(measured by PDOP index) should remain below 3.5 for the duration of each cm
occupancy. Due to distance dependent errors which adversely affect Reliance
Processor’s ability to resolve carrier phase ambiguities, cm processed points should be
no farther than 10 km from the base location.
In spite of Reliance’s ability to provide precise positions of logged features, external
error sources such as faulty antenna height measurement or centering can
significantly degrade results. Errors in measured rover antenna position and errors in
the known base station coordinates apply directly to position uncertainty of logged
features. With careful field procedures, errors resulting from these sources can be
Table 2.3: Reliance Processor System Accuracies
Submeter
Decimeter
Precision
•
35 cm, static or
dynamic, 67%
probability, post-
processed
•
75 cm, static or
dynamic, 95%
probability, post-
processed
•
45 cm, 2-sec RTCM
latency, 67%
probability, real-
time correction
•
10 cm, tracking satellites for 20 min, static
or dynamic, 67% probability, post-
processed
•
15 cm, tracking satellites for 20 min, static
or dynamic, 95% probability, post-
processed
•
15 cm, tracking satellites for 10 min, static
or dynamic, 67% probability, post-
processed
•
30 cm, tracking satellites for 10 min, static
or dynamic, 95% probability, post-
processed
•
15 cm, tracking satellites for 10 min, static
or dynamic, 67% probability, post-
processed
•
35 cm, instantaneous, static or dynamic,
67% probability, post-processed
•
75 cm, instantaneous, static or dynamic,
95% probability, post-processed
•
45 cm, 2-sec RTCM latency, 67%
probability, real-time correction
•
1 cm, static only,
tracking satellites for
> 30 min, 67%
probability
•
1.5 cm, static only,
tracking satellites for
> 30 min, 95%
probability
•
Same accuracy as
Decimeter system
for occupation times
<30 minutes or when
moving
•
45 cm, 2-sec RTCM
latency, 67%
probability, real-
time correction
Содержание Reliance FS/2
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