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GrafNav

Chapter 2

 

 

 

2.3 File Menu

2.3.1New Project

To process a baseline for the first time, start a new project. When you start a new project, choose between File Name and Auto Start. This section discusses these options and gives step-by-step instructions to follow once you have decided on the method for starting your project.

File Name

File Name prompts you to select a new project file name. Once you have selected a name and where to save the project, click Save. For information on file types, see Chapter 7 on Page 207.

The remaining steps must be performed manually.

These steps are in the shaded box.

How to create a new project using File Name

1. Select GrafNav or GrafNav Lite from the Waypoint GPS program group in your start menu.

2. Select File | New Project | File Name. A window appears asking for the name of the new project.

3. Enter the name and where you would like to save your project.

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

4. Click Save.

5. Select File | Add Master(s) to load master files.

6. Select from the list of GPB files, select those collected at the base station (s) and click Open.

7. Select remote.

8. Select a setting profile (this step is optional).

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How to create a new project using Auto Start

1.Select File | Auto Start | Browse to name the new project. Use the Add button to choose master station file(s).

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

2.Use the Browse button to choose the remote file. The master and remote station files must contain data collected during the same time period. To see the time that the data was collected, click the Plot Coverage button to display the File Data Coverage plot.

3.In settings, choose a processing profile.

4.Out of the five preset settings, choose the settings that best suits the application.

5.Enter the master station coordinates.

6.Enter the remote station antenna height.

7.Check the Start processing page right away box, and click OK. See Section 2.5, on Page 61 for more information on processing.

Auto Start

Auto Start prompts you for all the information required to process a data set. This option allows you to add master and remote stations and to use a project setting that best suits your application.

You can also choose to have Auto Start begin processing your data automatically by activating the

Start processing page right away box. The Auto Start steps are in the shaded box.

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GrafNav

Chapter 2

 

 

 

2.3.2Open

This option allows you to open existing projects.

2.3.3Save Project

GrafNav automatically saves the project file before processing. Any changes made to features like name, time, antenna height are also saved.

2.3.4Save As

Use the Save As command under the File menu to create a new project that has identical processing options as the current project. This allows you to change the options in the new project and process the data without losing the solution computed by the original configuration. This can also be done by viewing the processing history. See Section 2.4.3, on Page 54 for details.

2.3.5Print

This option allows you to print various items including windows, plots and text files.

How to open a project

1.Choose File | Open Project. A dialogue box appears that asks you to select the name of an existing project (CFG file).

2.Choose the name of the project and click

OK.

How to save a project

1.Choose File | Save Project from the menu.

How to save a project “as”

1.Choose File | Save Project As from the menu.

2.Enter the name, file format and where you would like to save your project.

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

3.Click Save

How to print

1.Select File | Print and a dialogue box appears.

2.Choose the printer.

3.Choose the item you would like to print.

4.Set the page orientation, color and any other settings you need offered in the dialogue box.

5.Click OK.

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How to add a master file

1.Select File | Add Master File(s) after the new project has been given a name.

2.Select the files which contain the data collected at the base station(s) from the list of available GPB files. Click Open.

3.Enter the coordinates of the base station.

4.Verify that the coordinates are in the datum being used for processing. For more information, See Section 2.6.5, on

Page 97 .

5.Enter the antenna model and height information and click OK.

This height is used for computation so if baselines are 300 km or more, better results are obtained with ellipsoidal height.

How to change the antenna height on static sessions

1.Select View | Objects | KAR/Static.

2.Select Edit for each static session.

2.3.6Add Master Files

When starting a new project, the program needs the measurement data collected at the master station(s). Steps on how to add a master station are in the shaded box.

Master Station Position

After you select a master station, the Enter Master Position dialogue box appears with values averaged from the GPB file. These values might have errors of 10 meters or more. For IGS the GRP (Ground Reference Point) and for CORS stations the ARP (Antenna Reference Point) coordinates are pre-loaded in the Favourites Manager. See

Section 2.8.10, on Page 135 for more information.

Datum Selection

Proper datum selection is very important. Coordinates for CORS sites within favourites are stored in NAD83 and IGS sites in WGS84. WGS84 coordinates may differ from NAD83 coordinates up to 2 m, so be careful when using these coordinates. See Section 2.6.5, on Page 97 for more information.

Remote Station Coordinates

The antenna height entered in this box applies primarily to kinematic trajectories. It is overridden by features (stations / events) and static sessions. The steps on how to change the antenna height on static sessions are in the shaded box.

Entering the proper remote station coordinates gets higher accuracies. If you do not enter the antenna height, the height coordinates include the antenna height and this causes a vertical shift. If you are only interested in the ellipsoidal or orthometric height of the antenna, then enter zero.

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