Utilities	Chapter 8

If these steps have been followed successfully, WLOG will start logging data. If the screen is blank, and the program appears to be inactive, initialization was not successful.

8.5.2File

This menu allows you to create a new project, open an existing project, load waypoints, find out about the program and exit the program.

8.5.3Display

This menu gives access to several text displays.

Position

This opens the Position Information window, which displays the GPS time, position, velocity, mode, number of epochs that have been logged, the number of ephemerides received, the station name, and the amount of disk space still available.

SatInfo

This opens the Satellite Information window, which displays information for each channel that is currently tracking a satellite. The PRN, azimuth, elevation, lock-time, and signal-to-noise ratio is displayed for each satellite being tracked.

Waypoint

This opens the Waypoint Information window, which displays information regarding the distance and azimuth between loaded waypoints.

RTCM

This opens the Differential Corrections window, which displays information pertaining to the choices made in Step 19 in Section 8.5.3 on Page 221 during the configuration of the project.

How to log data with WLOG cont.

27.Make requests for position, ephemeris, and satellite visibility records while logging. You can also display the time in HMS in GPS time, UTC time, or local time. UTC and Local time require the number of leap seconds to be entered as UTC time is a non-linear time system, unlike GPS time.

28.Click Next.

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Chapter 8	Utilities

8.5.4 Plot

Satellites

This opens the Satellite Az/Elev Plot window, which is a graphical display of the satellites’ elevation above the horizon, as well as their azimuths.

Scatter Plot

This opens the Scatter Plot window, which is a graphical display of the positions being computed by the receiver. When waypoints have been loaded, this plot is of more use for the remote station, especially waypoints that are represented on this plot by triangles.

8.5.5 Zoom Menu

This menu contains tools to zoom in or zoom out of the Scatter Plot window. These tools prove to be particularly useful when a waypoint file has been loaded.

The Reset Zoom option will scale the plot back to its default size.

8.5.6 Events Menu

Static/Kinematic (Shortcut key = F3)

This feature toggles the mode between static and kinematic. By default, the mode is static so change it for kinematic applications. Failure to do so results in errors during post-processing. Mark any static occupations that may occur during the kinematic survey.

Mark Station (Shortcut key = F5)

The toggling of the mode between static and kinematic is considered an event and is therefore automatically recorded in the STA file.

Mark stations that are occupied during the survey with this feature. Stations can be marked while the receiver is static or kinematic mode. Any station marks added are time-tagged according to the GPS time at which the feature was invoked and written to the STA file.

Next Waypoint (Shortcut key = F6)

This opens the Choose Waypoints window. Choose two waypoints from the list for the distance and azimuth between them and determines the distance from the receiver’s current position to a waypoint, and the direction to reach it.

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