Javad DELTA-3N, Руководство пользователя

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• TriPad “FN” Button Action - This drop-down list
box is used to program how the receiver will react to
clicking FN (i.e., keeping the button depressed for
less than one (1) second). In led blink mode switch
mode, clicking FN will toggle between the MinPad’s
standard and extended information modes. In occu-
pation mode switch you click FN to get the receiver
to insert into the corresponding log file a message
indicating that the occupation type has been changed
from static to kinematic, or vice versa.
• Turn Data Recording on at Startup - enables/dis-
ables data recording on at startup,
• Initial Dynamic Mode - specifies the starting oc -
cupation type descriptor that will be inserted at the
beginning of each receiver files logged via the Min -
Pad. You select static and kinematic to specify that
the corresponding log file will start with a static and
kinematic occupation, respectively.
• Appending data to a specific file - If the new re -
ceiver data are to be appended to an existing log
file, enter the desired filename in the Always append
to the file edit box. The setting can be up to twenty
characters long.
• Toggle Automatic Rotation Mode - enables/dis-
ables Automatic File Rotation Mode.
Automatic File Rotation Mode (AFRM)
Figure 16. AFRM
• Period – specifies the time duration of each of the
multiple log files created in AFRM mode.
• Phase – specifies the phase (i.e., constant time shift)
of the multiple log files created in AFRM mode.
• Enable Oldest Log-file removal – if active, the re -
ceiver will remove the least recent files if no free
space is available in the receiver memory to record
the current file
Setup and survey
After configuring the receivers for surveying, each
receiver needs to be setup up and the receiver’s height
measured and the survey can begin. The MinPad pro-
vides quick access for logging data, changing receiver
modes, and viewing general data logging and satellite
information during a survey.
A typical GPS survey system consists of a Base sta-
tion set up over a known point and a Rover receiver set
up to be a mobile data collector. After setting up the
Base and Rover receivers, the antenna height must be
measured.
Before collecting data, make sure the Base and Rover
receivers contain a current almanac and current ephem-
eris data.
The Base station must be set up, logging data, and
transmitting data before setting up the Rover receiver.
Receiver setup for either post-process or RTK surveys
is the same.
Measure Antenna Height
The location of the antenna relative to the point being
measured is very important for both surveys in which
the elevation of the points is important and in surveys
for horizontal location only. Horizontal surveys are of-
ten larger in area than can reliably fit on a flat plane,
therefore the antenna adjustment must be done in three
dimensions and then projected onto a two dimensional
plane.
The receiver calculates the coordinates of the anten-
na’s phase center. To determine the coordinates of the
station marker, the user must specify the following:
• Measured height of the antenna above the station
marker
• Method of measuring the antenna height
• Model of the antenna used
Antennas have two types of measurements:
• Vertical – measured from the marker to the anten-
na reference point (ARP) located on the bottom of
the receiver at the base of the mounting threads.
• Slant – measured from the marker to the lower edge
of the antenna slant height measure mark (SHMM)
located on both end panels of the receiver.
The point to which surveying with GNSS measures
is called the Phase Center of the antenna. This is anal-
ogous to the point at which a distance meter measures
in a prism. A user must enter the prism offset to com-