WiFi coverage tab

This topic describes the WiFi coverage tab on the Analysis results view, which by default is located at the left of the ESPA analysis center screen.

This feature requires option E12 WiFi. If you do not have this option this tab is not available.

The WiFi coverage tab displays WiFi coverage you selected on the Case analyses tab. It allows you to select which WiFi coverage data is displayed on the map.

By default there is always a Filtered networks folder but which other folders are displayed is dependent on what you selected on the WiFi footprint analysis dialog box when you run the analysis. For further information refer to the following descriptions.

The signal area and signal contours are displayed in the results if during the drive the GAR unit measured enough samples of the WiFi network. However if OSS-ESPA determines there are not enough samples then no signal area or signal contours results are shown but the WiFi network's location is still displayed. This location is identified based on where the strongest signal was measured. If there are multiple strong signals then the location is identified as the average of the latitude and longitudes of these signals.

For further information on using this tab refer to Viewing WiFi footprint analysis results.

NOTE: If you want to save your WiFi coverage configuration use Save WiFi coverage on the Case analyses tab.

Click to open or close the view. You can also click and drag the view border to change the view size.

Click to expand the view of the Analysis results view so that it displays the total width of the contents of the currently selected tab. If the view is expanded click to restore it to its previous size.

Click to display a list of all the tabs that are currently open on the Analysis results view. This is useful if you have a lot of tabs open as it provides an alternative method to select that tabs rather than locating them by scrolling along them.

This folder is always displayed but the default contents are dependent on whether or not you selected a file on the WiFi footprint analysis dialog box that identified WiFi networks that you were specifically interested in.

  • If you selected a file then this folder will have the WiFi network (SSID and MAC address) that you included in your file detailed, along with their signal trail, and if available the signal area and signal contours.
  • If you did not select a file then this folder is empty by default but you can use the WiFi networks tab to add WiFi networks of interest to it. For further information refer to How to add networks to the Filtered networks folder.

This folder is displayed by default if there is phone data uploaded to the case. It details the phone number, the WiFi networks (SSID and MACaddress) used by the phone, and each WiFi network's signal trail, and if available their signal area and signal contours. This requires that the phone data includes WiFi calls which details the MAC address of the routers.

This folder is only displayed if Match by target location is selected on the WiFi footprint analysis dialog box. It details the target location, the WiFi networks (SSID and MAC address) providing coverage to the target location, and each WiFi network's signal trail, and if available their signal area and signal contours.

This folder is only displayed if the drive collected a stolen device's MAC address. For each stolen device, the result displays all the known details of all the stolen device. These details were added to OSS-ESPA by your administrator and will always include a MAC address, and optionally include a contact name, phone number, manufacturer and model. Each stolen device also displays a device trail. If you view the device trail on the map arrows identify the locations the device was detected and the direction of the device's movement. For each network a stolen device was detected on, the results identify the WiFi network (SSID and MAC address), the signal trail, and if available the signal area and signal contours.

This folder is only displayed if the drive collected a stolen device's MAC address. For each network a stolen device was detected on, the results identify the WiFi network (SSID and MAC address), the signal trail, and if available the signal area and signal contours. The Stolen devices detected folder displays all the known details of all the stolen devices found on that network. These details were added to OSS-ESPA by your administrator and will always include a MAC address, and optionally include a contact name, phone number, manufacturer and model. Each stolen device also displays a device trail. If you view the device trail on the map arrows identify the locations the device was detected and the direction of the device's movement.

Select to display the device trail on the map. Arrows on the map identify the locations the device was detected and the direction of the device's movement.

Select to display on the map the area in which the selected WiFi network's signal power level is above the Coverage threshold set in the WiFi footprint analysis dialog box. If this output is not displayed for a WiFi network it means that the signal power level for that WiFi network was never above the set threshold.

Select to display on the map the areas in which the selected WiFI SSID's signal level is in each signal level band. For the selected WIFi SSID, the signal power level is represented on the map using different colors for each signal level band. The Legend view displays a key that details the ranges of each signal level band. These signal level bands are defined prior to running your WiFi footprint analysis on the WiFi footprint analysis dialog box.

Signal contours allow you to visualize how the signal degrades geographically (from the green high power signals to red low power signals) as it propagates away from the WiFi network. The signal contours clearly identify where the WiFI network's signal cannot reach and therefore where calls physically cannot be made through the selected WiFi network. This is very useful if you are challenging alibi locations.

Select to display on the map the route you drove during the drive test. For the selected WiFi network, the signal power level is represented on the map using different colors for each signal level band. The Legend view displays a key that details the ranges of each signal level band. These signal level bands are defined prior to running your WiFi footprint analysis in the WiFi footprint analysis dialog box. Grey represents areas that you drove where no signal was detected by the selected WiFi network.

For the analysis folder click to display Remove from map. This removes the WiFi coverage for the selected analysis from the map and automatically closes the WiFi coverage tab and the WiFi networks tab.

For each folder click to display Clear all items. This clears all those items from the map.

For any result you have selected then click to display Zoom to this. Select to zoom to that item on the map.

For any WiFi network's Signal area that you have selected then click to display Edit coverage color. This allows to change the default appearance of the WiFi network's signal area. You may want to change a WiFi network's appearance if the automatic selection of colors has placed WiFi networks of a similar color side by side making the signal area difficult to distinguish between. This is also useful if you are taking screen captures of the map where you want it to highlight specific WiFi networks of interest as it also allows you to adjust the thickness of the WiFi network's boundary lines. For further information refer to Coverage color dialog box.