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Chapter 4

GrafNav Batch

 

 

4.1Overview of GrafNav Batch

GrafNav Batch accompanies the GrafNav / GrafNet and GrafNav Lite software packages. It batch processes kinematic and static baselines using the GrafNav processing options including float-only, fixed static, and KAR solutions. With GrafNav Batch, you can easily load observation files (GPB), process multiple baselines, process multi-base baselines and export the output of numerous sessions into separate or integrated files.

Static-only baselines/networks are best processed using GrafNet.

Multi-base kinematic trajectories can also be processed in GrafNav.

4.1.1 Getting Started with GrafNav Batch

This section contains a tutorial to help you process multiple baselines. Each menu is defined in detail later in this chapter.

Before you start a project in GrafNav, verify installation, convert data and download any required data.

Install Software

Verify that the installation was successful by ensuring that you have a Waypoint GPS program group on your computer. If this program group is not there, see

Section 1.2.2, on Page 24 for installation instructions.

Convert Data

To be processed, raw GPS data files have to be converted into Waypoint’s GPB format, including raw data from Waypoint’s data-logger program. Instructions on how to convert these files are in the shaded box.

Use the GPBView utility to switch between static and kinematic mode. See Chapter 3 on Page 221.

Create a New Project

The steps to create a new project are listed in the shaded box. The Auto Start feature can also be used to automatically bring up all the pertinent dialogue boxes. See Section 2.3.1, on Page 33 for more information on the Auto Start feature.

How to install software

1.See Section 1.2.2, on Page 24 for installation instructions.

How to convert data

1.Select File | Convert | Raw GPS to GPB to access the converter.

2.Navigate to the directory that contains the data.

3.Select Auto | Add All to auto-detect GPS formats.

4.If you want to change the conversion options, click on Options or Global Options to set the rover to kinematic mode.

How to create a new project

1.Select File | New Project | File Name in GrafBatch.

2.Enter the name of the new project.

3.Click Open.

Entering the name of a project that already exists overwrites the file contents.

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Chapter 4

GrafNav Batch

 

 

How to add many baselines

1.Select File | Add Baselines.

2.Select the appropriate directory containing the observation (GPB) and ephemeris (EPP) files.

3.Select the One base many remotes or One remote many bases option depending on whether the base or remote file is common to all baselines.

4.Highlight one or more GPB files for the master station(s) and click Add Base(s). You are prompted for coordinates and antenna information for each base being added.

5.To specify remote antenna heights, enable the Prompt for remote antenna height option.

6.Highlight all the remote station observation files and click Add Remote(s).

7.Click OK.

How to add multi-base baselines

1.Select File | Add Multi-Base Baseline.

2.Click Add to add the master files.

3.Click Browse to add the remote file.

4.Click Plot Coverage to display the File Data Coverage plot of the files added.

5.Add coordinates antenna height information when you are prompted.

6.Add remote antenna height when you are prompted.

7.Click OK.

A multi-base (MB) project can easily be imported from GrafNav by selecting File | Import CFG files. See Import CFG Files on Page 182.

Add Many Baselines

GrafBatch requires baselines for batch process. To add baselines, follow the steps in the shaded box.

Add Multi-base Baselines

To add Multi-base Baselines, follow the steps in the shaded box.

Set Processing Options

If you do not wish to specify individual processing options for each baseline, select Process | Process All Baselines. A warning will appear indicating that all baselines will be processed using the same option.

Baselines requiring processing options that differ from others can be customized by right-clicking the baseline(s) in the List of Baselines and selecting Process. Select all of the baselines and go to Process | Process Selected. This processes all the baselines, while preserving processing options for each individual baseline.

Combine Baseline Solutions

When there are many base stations and one remote, or multi-base baselines, a combined file can be created that uses weighted observations from all of the baselines. See Section 2.5.3, on Page 91 for information regarding combining baselines.

Export data output into files

To export coordinates and other information from processed baseline sessions to ASCII text files, follow the steps in the shaded box. During this procedure, you can also control how the output files are named and what file extension is to be used.

Save Project

To save the configuration, select File | Save Project.

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GrafNav / GrafNet 8.10 User Guide Rev 4

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