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File Directory
If you wish to view the number of files in the receiver memory:
1.
Saving Parameter Settings
Ordinarily, receiver parameters that have been changed return to their factory default
status after a power cycle. To save the receiver settings,
1.
For details on these commands and responses, as well as the rest of the GG Surveyor
command and response repertoire, refer to Chapter 6, Command/Response
Formats.
Static Surveying
The static method of GPS surveying utilizes stationary site occupations to solve
carrier phase ambiguities. During an extended survey period, the satellites being
observed move across the sky, changing the satellite geometry. The changing of the
geometry enables the post-processing software to determine carrier phase ambiguities
and then determine the position of the unknown point. The required occupation time
is dependent upon the length of the base line between the two points being observed
(the longer the baseline, the longer the occupation time) and the condition of the
atmosphere (the ionosphere) during the data collection period. Average occupation
times range from ten minutes to three hours. Users recognize the static method of
surveying as the most accurate method because of the large amount of data collected.
Since the GG24 is a single-frequency receiver, baselines greater than 20 km may have
increased error due to the effects of the ionosphere.
Performing a Static Survey
A static survey uses at least two stationary GG24 receivers that simultaneously
observe the range and carrier phase of several common satellites over a specific time
period. One receiver is centered over a known point, while the others occupy
unknown positions.
16
Type: $PASHQ, FLS,0 and press <Enter>.
The response message displays an ASCII string that begins with the header:
$PASHR,FLS
The message contains the total number of data files and the amount of free
memory remaining. For further description of the FLS message, see
"$PASHQ,FLS,d" on page 83.
Type: $PASHS,SAV,Y and press <Enter>.
GG Surveyor GPS+GLONASS Reference Manual
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