Kinematic "on the fly", contd – Leica Geosystems GPS System 500 - Getting Started with Static and Kinematic Surveys User Manual

Page 44

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Static and Kinematic Surveys-2.0.0en

Kinematic "on the fly"

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Kinematic "on the fly", contd.

The Stop & Go indicator will provide

useful information for this kind of

operation (while you are moving):

Post-processing of Kinematic-on-

the-fly measurements

SKI-Pro will treat the data as so

called "Mixed Tracks". Both static

and moving data is contained in one

and the same chain of measurements:

"5 Sat's since mm:ss" tells the

operator the time elapsed since

tracking started or since the last

complete loss of lock. It is

recommended to start occupying

points only once this counter exceeds

2 minutes. In case of a complete loss

of lock (i.e. the number of satellites

tracked on both L1 and L2 falls below

5, the counter is reset to zero.

In the example above points 1 to 5 are

static points. Data-processing will

compute and provide a position for

each static point by averaging the

results of each epoch of data which

was taken during the static occupation.

Taking measurements

As soon as the main Survey panel is

accessed, data logging commences

according to the configured logging

parameters. You will see the status

icons changing from moving to static

in case you press F1 OCUPY. After

finishing a point occupation by

pressing F1 STOP and F1 STORE

the measurement mode will switch

back to "moving".

SKI-Pro will process such data and

resolve ambiguities "on the fly". It is

recommended to collect about 2

minutes of cycle slip free data before

you start occupying points. Otherwise

you take the risk that ambiguities

cannot be resolved and the accuracy

of such points will certainly not meet

the specification of 1 - 2 cm + 1 ppm.

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