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MSAW inputs
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marvin.palmer
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Joined: 16 Jan 2012
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Location: Colorado Springs, Co

PostPosted: Wed Jan 18, 2012 10:30 pm    Post subject: MSAW inputs Reply with quote

I have a question on inputting MSAW data...

If the floor is 1,600 and the ceiling is 20,000

does this mean if the a/c is 10,000 it will give me an alert?
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Marvin Palmer
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Ross
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PostPosted: Wed Jan 18, 2012 10:33 pm    Post subject: Reply with quote

Yes.

Normally MSAW volumes will have a floor of zero ... doesn't make sense to be able to fly underneath one. Smile
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marvin.palmer
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PostPosted: Wed Jan 18, 2012 10:34 pm    Post subject: Reply with quote

Good to know..thanks Ross
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Marvin Palmer
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marvin.palmer
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PostPosted: Thu Jan 19, 2012 10:27 pm    Post subject: Reply with quote

One more burning question, Thanks to Andrew I've inputted all my area information....How do I know if its good to go?
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Marvin Palmer
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Ross
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PostPosted: Thu Jan 19, 2012 10:36 pm    Post subject: Reply with quote

Best thing to do is test in sweatbox.
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Xalorplex
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PostPosted: Fri Jan 20, 2012 3:37 pm    Post subject: Reply with quote

I have another quick question regarding MSAW inputs:

When putting in the volumes, do you have to have the same starting and ending coordinates or does it automatically close from the last coordinate?
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Ross
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PostPosted: Fri Jan 20, 2012 3:50 pm    Post subject: Reply with quote

It automatically closes.
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Xalorplex
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PostPosted: Fri Jan 20, 2012 4:10 pm    Post subject: Reply with quote

Hmmm... then in that case I don't know why my MSAW volumes aren't causing any warnings. I'm essentially converting my MVA maps into separate sections in my sector file, then exporting them to a video map format to get the coords and cleaning up the file before copy/pasting the coords into the vSTARS volume. When I do the conversion to a video map and look at it, the correct area is outlined.

This may not be the most elegant way to get the coords, but it should work, right? Maybe I have the lat/long backwards?
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Ross
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PostPosted: Fri Jan 20, 2012 4:25 pm    Post subject: Reply with quote

You might have them backwards ... should be entered as lat,lon in the system volume editing window.

To have vSTARS plot your system processing volumes on the scope, open the DCB MAPS submenu, then press the SYS PROC button. You'll see a list of special map numbers that pertain to different types of system processing volumes and radar coverage areas. Use the MAPS keyboard command to toggle these special map numbers on/off.
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Xalorplex
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PostPosted: Fri Jan 20, 2012 5:02 pm    Post subject: Reply with quote

I did have the lat/long backwards. I didn't know how to plot the MSAW volumes either, thanks! Very handy.
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Xalorplex
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PostPosted: Sat Jan 21, 2012 12:17 am    Post subject: Reply with quote

Back with a report! So displaying the MSAW volumes (well, areas I guess since the radar is 2D) works out perfectly! Everything is where it's supposed to be!

However, I just wanted to make sure that everything is behaving as it's supposed to. I assume the warnings are supposed to only activate when an aircraft DESCENDS below the MSAW ceiling? And that departing aircraft should trigger anything? I tried an experiment by removing the MSAW suppress volume around the airport and this was what happened.
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Ross
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PostPosted: Sat Jan 21, 2012 12:36 am    Post subject: Reply with quote

The alarm should sound if the aircraft is below the ceiling or is projected to be below the ceiling based on calculated vertical speed.
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marvin.palmer
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PostPosted: Sat Jan 21, 2012 12:51 am    Post subject: Reply with quote

I just finished trying my MSAW out and the consistancy is 200 feet above the ceiling I get the warning on aircraft that are desending to that level (MSAW ceiling).
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Andrew Wolcott
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PostPosted: Sat Jan 21, 2012 2:40 am    Post subject: Reply with quote

The projected time, or look ahead time is 10 seconds. So if an aircraft is descending at 2000 feet per minute, expect the LA alert to sound 333 feet above the ceiling.

As I said, you can't really use the MVA as your ceiling altitude. A good rule thumb is to take your MVA altitude and subtract 1000. I actually subtract 600, after doing some testing.

So, with the same 2000 FPM descent, I expect to get LA alert when the aircraft is approximately 300 feet below the MVA and project to bust the MSAW ceiling.
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marvin.palmer
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PostPosted: Sat Jan 21, 2012 8:43 am    Post subject: Reply with quote

Thanks for the advice, I'll adjust the altitudes and try again...
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