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Wasmer Consulting - BaseOps - User's Guide - Setting Core Case Properties


BaseOps User's Guide, Chapter 10: Setting Core Case Properties

After creating a new BaseOps case, your first task should be setting the core case properties. Core case properties can affect how the rest of a case's data is entered.

In the list pane, choose Case from the object type selector dropdown list. Then set the properties in the text pane.

Tip:

BaseOps can import some core case properties from DAFIF. See the instructions for importing airfield information in Importing Information from DAFIF.

Case Information

The Case Name is a short (60 characters maximum) description of a BaseOps case, such as "Wright-Patterson Air Force Base 1990 Noise Study". It should unambiguously identify the case.

The Case Abstract is a narrative summary of a BaseOps case. It describes the "what" aspects of the case. There is no restriction on the length of the abstract. Press the Enter key to insert additional lines.

The Case Purpose is a brief description of the reason that a BaseOps case was created. It describes the "why" aspects of the case. There is no restriction on the length of the description. Press the Enter key to insert additional lines.

Use the Case Notes to store miscellaneous information about a case. There is no restriction on the length of notes. Press the Enter key to insert additional lines.

Site Information

The Site Name is a short (60 characters maximum) description of the location being modeled by a BaseOps case. Typically, this will be an airfield name, such as "Wright-Patterson Air Force Base". However, it may also be the name of a region, such as "Boston Metropolitan Area" or "NAS Oceana and Associated Outlying Airfields".

Use the Site Notes to store miscellaneous information about a site. There is no restriction on the length of notes. Press the Enter key to insert additional lines.

Noise Models

BaseOps supports the following noise models:

Check the box next to each noise model that you wish to use as part of this BaseOps case. At least one model must be selected.

When you run the case, BaseOps runs each of the selected noise models. If more than one model is selected, BaseOps creates a combined noise grid containing the summed noise from all of the selected models.

Note:

BaseOps hides sections of the user interface that are not relevant to the selected noise models. For example, airspace profiles are only relevant to MRNMap. If you don't select the MRNMap noise model, then BaseOps hides the section of the user interface that allows airspace profiles to be edited.

Reference Point

The reference point is a well-defined location associated with a BaseOps case. The latitude, longitude, and elevation of the reference point must be known, and the point should be easily identifiable on maps.

The reference point serves as the origin of the local X-Y coordinate system used by the noise models. As such, it should be located near the center of the case's area of interest.

Tip:

The center of one end of a major runway is often a good reference point.

The reference point has the following properties.

Operations

The Flying Days per Month and Annual Operating Days are the average number of days per month and year, respectively, on which aircraft typically operate at the principal airfield being modeled by the BaseOps case. For airfields that operate continuously, 30 days per month and 365 days per year are typically used. The monthly average is used by the MRNMap noise model. The yearly average is used by NMap, AAM, and RNM. These data entry fields may be hidden, depending on which noise models you selected: see Noise Models.

The Number of Daily Periods specifies the number of periods into which a 24-hour day is partitioned for the purpose of noise modeling. This allows the noise models to give some consideration to the time at which noise events occur (events that occur at night are considered more significant, due to their greater potential to annoy).

The number of daily periods is determined by the noise metric (DNL or CNEL) being used, which in turn is generally determined by the applicable laws governing the site being modeled.

You have two choices for the number of daily periods.

Magnetic Declination

The Magnetic Declination is the difference between true and magnetic north at the location being modeled by a BaseOps case. It is specified in decimal degrees.

The current magnetic declination is indicated by BaseOps' north arrow: see North Arrow.

Contact Information

The requested contact information identifies the person or organization that is responsible for a BaseOps case. All of the information is typed as freeform text; there are no restrictions on what can be typed into each of the text boxes.

AAM Advanced Options

The AAM Advanced Options section pertains only to the AAM noise model. This section is hidden unless that noise model is selected: see Noise Models.

For non-helicopter AAM aircraft (such as the fixed-wing vectored thrust F-35 and the tilt-rotor V-22 Osprey), accurate values for the angle of attack and the yaw angle are difficult to obtain. Under realistic flying conditions, these values rarely depart significantly from zero, so by default, BaseOps assumes zero for these parameters, and hides the portions of the BaseOps user interface where these parameters are edited and/or displayed. Most uses should leave these parameters locked at zero.

If you have specialized needs, you can check the box labeled Allow editing of attack and yaw angles for non-helicopter AAM aircraft. This will display the sections of the BaseOps user interface where these parameters can be edited.


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