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TERPS - Microwave Landing System (MLS) Procedures

 Background

The latest release of Terps® Professional has again been enhanced!. We have added the ability to analyze a structure against the new FAA criteria for precision Landing Systems (8260.36A) to provide greater accurate to your building decisions.

 Example Image of an MLS Procedure  

The image to the left is typical of an MLS analysis. We have made the process extremely easy to use and get results the first time. The procedures are simple.

MLS Procedure
(click to enlarge)
 Steps to draw an MLS Procedure  

1. Select from the OPTIONS Menu "Extend Centerline"

2. Select from the Runway List the runway to be identified.

3. The centerline extended will be drawn outward from the runway end desired.

4. Select from the DRAW Menu "IAP".

5. Select from the IAP Menu select "MLS"

6. Move the cursor anywhere on the screen and click

 7. Drag the cursor along the centerline to a distance of about 30,000'

8. When prompted to save select "Yes".

 Completing the MLS Procedure Analysis  

1. A data window will open as shown left


(click to enlarge)

Using information from the published instrument approach procedure enter:

* TDZE (Touch Down Zone Elevation)
* DH (Decision Height)
* TCH (Threshold Crossing Height)

The default Glide Slope angle is 3°. Please change to match the published value. The Runway Elevation comes from internal Terps Data. This value may also be changed.

Now identify a point to study by opening an existing Airspace ® case study or simply select the new point tool from the Airport Toolbar and click on the screen. Press the reset button in the MLS Dialogue Window and Then 'OK'. The program will now draw and analyze the selected point.

* The OCS origin is the point where the course starts (200' outbound of threshold).
* The FAF is the point where the right mouse button was released.
* The DH Coordinates is a calculated value.
* The Obstruction Data is the point under study.
* The Analysis is the results.

Along Track is the distance down the runway centerline and the Abeam distance is how far over from centerline the object under study is.