OAS and SBAS

START OAS

OAS.PNG

Click on Utilities PANS OPS and select OAS_SBAS, and the WIZARD appears. It's simply as program OAS from ICAO. AirNavCAD uses the tables From the ICAO program PANS-OPS OAS  to generate OAS ILS. SBAS APV its derivate from OAS CATI as Attachment to Part III
DERIVATION OF THE SBAS OBSTACLE ASSESSMENT
SURFACES (OAS) tells.

WIZARD

OAS_selec.PNG

Wizard is very easy to fill in, just introduce the necessary data. You can extend OAS up to FAP, IF just introduce altitude in ft and Distance DME from THR.

 

Select OAS CATI, CATII, SBAS APV, SBAS CATI.

By default RDH Correction is checked as pans ops oas.

OAS areas

oas_init.PNG

If you click Finish in the wizard The output tell you , you must click on THR and LOC/GARP.

After thar you get the OAS in the workspace, with the message and also with the parameters of Planes and Points.

OUTPUT

Res_OAS.PNG

You can see the parameters of Planes and Points in the output component 

INFO

OAS_info.PNG

If you select a plane from OAS you can get the information about how that OAS was built with the parameter and data input.

Analysis Obstacle

OAS_eval_panel.PNG

Click on

UTILITIES PANS OPS

ANALYSIS OBSTACLE

PANS OPS MAIN AREAS

Select

OAS

and click next:

the obstacle data wizard appears, you have to load obstacle data and click Finish.

The output tell you select the Z plane from oas with red circle and evaluation stars. Select at the end of the plane Z.

Analysis Obstacle

obstacle.PNG

It takes less than 2 minutes to analysis 200 m size cell from DEM (2.000.000 points) or

up to 10 minutes for 05 m size cell from DME (80.000.000 points)

You get the critical obstacle with a red circle (in layer criticalObstacles) in the drawing and also get the main data in output.

You can move the vertex/insert vertex of the areas  to limit the area to analysis. Not CUT because information from OAS is LOST.

Analysis Obstacle

Evalution_outpiuto.PNG

Also you get in the file of the analysis of the first 5000 or 10000 critica obstacle.

Including OCA estimation for all CATs.

KML

kml.PNG

As any area you can export that area to KML.

First select all the oas area

then Click 

Basic Operation

Transform to KML

And you get the KML in the folder of KML of the program

My Files / Documents / AirNavCAD / KML

CAT II

ILS Cat II: ILS Cat II OAS and those portions of ILS Cat I which lie above the limits of ILS Cat II; OAS CATII up to 150 M above threshold AND CAT I from 150 M to 300 M

HL adjust and GP prima plane

a) for airfield elevation higher than 900 m (2 953 ft)
b) for glide path angles greater than 3.2° upt to 3.5°.

c) User can edit HL with a IAS VAT or a choose one.

c) User can select method to considerer obstacles on MA or Approach

ILS: Glide path angles above 3.5°

a) the W surface of the OAS;
b) origin of the Z surface of the OAS; and
c) height loss/altimeter margin 

Slope MissAproach

5.0% is the limit as in the tables is not indicated more.

VIDEO 3 OAS and SBAS