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OIC_NAP Concept:Read .OIC or foreign files

Transform navigation and attitude of sensor

Filter navigation and attitude of sensor

Export/import navigation and attitude

Compensate for biasSupplemental Navigation and Attitude data filtering and smoothing software for GeoDAS

OIC_NAP (OIC Navigation and Attitude Processing) allows users to pre-filter navigation and attitude information from data files. Why filter the data?In OIC_NAP you can: Remove noise Smooth and interpolate dataTransform sensor position, pitch, roll, heading, course, depth and altitude data.

Raw dataSame data after smoothing in OIC_NAPThe difference is obvious.

Opening OIC_NAPDouble-click on the OIC_NAP icon located on your desktop

The OIC_NAP GUI and PanelsAttitude / Environmental PanelAttitude Graphics PanelsNavigation PanelNavigation Graphics Panel(showing a navigation path)ToolbarMenu barDisplay Panel

ToolbarOpen Save Header Save Data Convert Files to OICImport/Export DataConvert Nav to Course Convert Nav to Speed Geodetic Projection Navigation Latency LaybackBias & Scale Vessel Draft Help Index Attitude/Environmental Latency Tide Level

Display PanelThe Display panel (found to the left of the Navigation Editing Panel on the OIC_NAP interface) allows you to select which data type you wish to process, for OIC files that contain more than one type of data. It also offers you a Symbols toggle, to have the data plots drawn with or without symbols, indicating the location of the data. By default, symbols are off, and data plots are drawn with simple lines linking points. To enable plotting of symbols, toggle the Symbols button to ON.

Navigation PanelUse the options within the Navigation panel to aid in processing Navigation data. The Navigation panel consists of several tools to assist in processing data, including:

Navigation Tool Bar (graphics control and editing icons)

Navigation Filter Coefficients pane

Navigation Source panel Process button

Navigation Graphics PanelThe Navigation Graphics panel will show the navigation of the boat and the layback between the fish and boat geo-referenced within a grid in either UTM or Latitude/Longitude degrees, minutes, and seconds. The raw data is shown in red while the final interpolated data is shown in black.

Attitude Environmental PanelThe Attitude/Environmental panel consists of several tools to assist in processing data, including the:

Attitude Tool Bar

Attitude Icons panel

Attitude Source mini-menu

Attitude Filter-Coefficients panel

Process button

Display buttons

Attitude Graphics PanelsHeadingAltitudeDepthRollPitchCourse

This option allows you to transform sensor and vessel navigation from one coordinate system to another. Datum ConversionSelect Navigation > Geodetic Transformation on the Menu Bar.A Transform Sensor and Vessel Navigation dialog window (seen below) should appear.Next, press the Configure button.

Coordinate System SelectionChoose your Grid, Zone, Datum,Projection, Hemisphere, click OK, then click the Transform button (in the Transform Sensor and Vessel Navigation dialog window) .

Choose files to convert to OIC format.Select File > Convert to OIC Format.

Select the files you wish to convert and press Open.

New .OIC files have now been created in the same file directory that your raw files were stored.

Import/ExportChoose the Import/Export option on your Menu Bar to import or export Navigation or Attitude data to or from a text file. This pop-up window appears to allow you to choose indexing format and check boxes to select one or more elements. This can be very useful if you need to do something to the data that OIC_NAP is unable to manage right now, like the Fourier transform for example. This is also very useful for merging navigation or other meta-data processed outside of OIC_NAP.

Filtering and SmoothingHere is what data typically looks like when first opened in OIC_NAP

Navigation Panel Filter CoefficientsNote: Symbols is On and data points appear on graphics panel.Filter Coefficients are set with Median Span (for filtering outliers) set at 7, and Mean Span (for smoothing) set at 21. After input of numbers, click on the Process button in this same section.

Filtered data forms a red, smoother path that follows closely to original path, seen in magenta.

Zooming into Navigation Graphics PanelFirst click the circled button in the Navigation PanelNext, follow these steps belowThe box zooms in on the data points

Attitude/Environmental Panel Filtering and SmoothingWhen smoothing data in the Attitude Panel, you may want to check your source and smooth one item at a time by clicking the buttons available or in the drop-down menu, or all at one time by selecting All in the drop-down menu.

Bias and Scale TransformationChoose a component, such as Heading in the main GUIs Attitude/Environmental Panel, then select Attitude/Environmental > Bias & Scale Transform under the Menu bar option. The pop-up window will appear. Make sure the Bias is set at 0 and select the All radio button under the Apply section. (You can also choose a portion of the data by selecting the Subset radio button then input the ping numbers to set the start and end of the subset.)

Click Apply to apply your settings, Undo to revert back, and Close to close the dialog box. The Attitude Bias & Scale Transform option allows you to linearly modify any header Attitude/Environmental component by Bias (additive) and Scale (multiplicative) factors.

Click on the Heading button and set your Attitude Panel Filter Coefficients and choose the Process button.

Data appears on the GUI processed in several ways raw, uniqued, edited, medianed, meaned, and processed.

Lay-back/Cable-outThis option allows you to account for offsets between the primary navigation sensor (GPS) which is considered to be at the (0,0) coordinate on the vessel, and the sensor, which may be mounted elsewhere, and then displaced actively from that mount point (by letting out cable).

Select Navigation > Layback/Cableout or click on the Layback icon on the Toolbar

This window appearschoose one of:

cable-out:constant (type in a constant length in the text box) or selectrecorded values method: fish heading or delayed nav

Click OK.

Once your data has been processed, select the RED save button. This overwrites the .OIC files made at the beginning.

You may now exit OIC_NAP and start GeoDAS-Desktop for data playback and review, or continue your smoothing and editing process within the OIC_NAP program.End OIC_NAP Training