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Get PM Range = 0
As I found some troubles reading the PM Range variable in some PM
configurations, you can override it here and set the range manually with the
assigned keys or LSK’s.
Simulate current PM WX Mode = 1
If you want to make the WXR Image make visible in your Project Magenta
Navigation Display then set this Flag to “1”. Additionally set the Bitmap Export
Directory entry (described above) to the NetDir of your Project Magenta Network.
Set PM Update Rate = 7
This parameter sets the update rate of the PM exported image in refresh cycles.
One refresh cycle is about 8 seconds, so expect 56 sec. updates as default.
Making the value smaller results in more updates but also in more glass cockpit
stutter. Find a usable setting for your GC CPU, but 6-7 is a practical value.
3.3 SA_WXR embedded in Project Magenta Navigation Displays
You have the possibility to make the weather radar image visible in the Project
Magenta Software Navigation Displays. Although there are a few limitations you
will get a very realistic weather display experience. Until now the Project
Magenta System uses Satellite images for weather data. Now the SA_WXR
AOG AOG SA_WXR Users Manual Revision 1.6
http://members.chello.at/addongauges Page - 6 -
exports the its weather radar data. I think this combination is the best solution for
airliner weather radar simulation. Since the transfer of the image data is done via
a data file in the PM NetDir folder, there is following limitation. The radar image
displayed in the ND can not be updated every 8 seconds, since this would make
the PM GC stuttering, because of the many file accesses. It is reloaded every
1min. But the image is moved along with the aircraft translation and rotation, this
does not generate any offsets. And whenever a change in the settings is done,
the image is also updated within the next beam rotation.
Following setup should be done for proper PM interfacing:
- Download the newest GC Version of your Product
- Do not install the SA_WXR and the GC on the same PC, it is best to install the
SA_WXR on the FMC PC anyway
- Make following SA_WXR.cfg setup
Bitmap Export Directory = >>enter your PM NetDir here<<
Enter the NetDir without last Backslash C:\PmNetDir for example
Disable Output when in Bitmap Export Mode = 1
You should disable the SA_WXR display output since it only costs
performance and will not be useful for you in this mode
Get PM Range = 1
So you lock the WXR Range to the ND range.
Simulate current PM WX Mode = 1
Bring the SA_WXR to PM Export mode.
Set PM Update Rate = 7
Set the update rate as best working for you, 6-7 as default works in most
configurations
- PM displays now the WXR image and the tilt angle, but the tilt setup and the
OFP and GCS function have to be set on the SA_WXR screen or via FSUIPC
as described below
AOG AOG SA_WXR Users Manual Revision 1.6
http://members.chello.at/addongauges Page - 7 -
4 Weather radar basics
4.1 Principles of operation
The target of a weather radar is to display the pilot hazardable and turbulent
meteorological areas. A ideal weather radar would display following hazards as
dense precipitation (hail), turbulent precipitation moves (updrafts within
thunderstorms), thunderstorms itself, low visibilities, wind shears, any clouds
etc.
The real solution is limited to only display precipitation density (density of
ice/water particles).
So a real weather radar does not display clouds, fog, winds, storms etc. it only
displays the density of precipitation in the air around you.
A weather radar transmits a focused microwave pulse into the sky. A part of the
microwave energy sent out is (similar to light) reflected when it hits a particle.
Some particles reflect more (for light this would be a mirror) some reflect very
few energy (glass for light).
The microwave from a weather radar is reflected best when hitting water (rain)
or wet hail, and is very weak reflected from drizzle and snow general ice
particles.
After the radar has sent out a pulse, it now measures how long it takes until a
part of energy is received, it measures the amount of the energy and the
frequency shift of the received signal.
Out of this data following can be obtained:
Time & Reflection Energy = Distance & Density of the particles
Frequency Shift = Velocity of the particles
This data is then displayed on the radar in three colors:
Green = weak density
Yellow = moderate density
Red = high density
Light magenta = moderate velocity changes (=turbulence)
Intense magenta = high velocity changes (=serve turbulence)
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