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Web500sjc
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What Is With The Mavrick (TTT / DFW) VOR?

Sun Jan 06, 2013 4:06 pm

I flew into DFW the other day, while there I noticed the VOR/ cowboy hat looking thing in the middle of the airport.

Does any one know why it was built like that? Or what the point of it is?

Also while there on Thursday afternoon I noticed 4 AA 772 and the AA 77W sitting around at the various hangers, anyone know why there were so many sitting around?
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PHLapproach
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Sun Jan 06, 2013 4:30 pm

It's a Doppler style VOR. Which tend to be much larger than a conventional. Now why they elevated it so high... Possibly for aesthetics cause it's at the entrance of the airport, in public eye and it's TEXAS! Everything is big in TEXAS! Right?!? But more than likely it's so high so that the vehicular traffic doesn't interfere with the signal.
 
rfields5421
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Sun Jan 06, 2013 6:55 pm

The Cowboy VOR (CVE) located just west of IH-35E between Joe Field and Merrell Roads - also has a 200 ft wide flat dish and is elevated about the same height as the Maverick VOR.

The HUB VOR (Hobby) at KHOU also has a 200 ft wide flat dish and is elevated - located atop the parking garage.

AirNav list those as H-VORW/DME

Some notes from the Wikipedia article on VORs.

Re the height

Quote:
Note that Doppler VOR beacons utilise an elevated groundplane that is used to elevate the effective antenna pattern

That is why they are so high and the big 200 ft wide flat antenna structure is the elevated groundplane.

and

Quote:
Doppler VOR beacons are inherently more accurate than Conventional VORs because they are more immune to reflections from hills and buildings.


[Edited 2013-01-06 11:04:30]

[Edited 2013-01-06 11:05:35]
 
IAHFLYR
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Sun Jan 06, 2013 9:33 pm

Quoting PHLapproach (Reply 1):
Possibly for aesthetics cause it's at the entrance of the airport, in public eye and it's TEXAS


Aesthetics is what I was told in the mid 90's when it was commissioned during the first Metroplex airspace design, IIRC.

Quoting rfields5421 (Reply 2):
The HUB VOR (Hobby) at KHOU also has a 200 ft wide flat dish and is elevated - located atop the parking garage.


Rumor a year or so back was that HAS wished they had located it someplace else other than the garage.
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FredT
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Sun Jan 06, 2013 11:12 pm

I think PHLapproach called it right. They were worried, and rightly so, about the traffic on the parkway interfering with the signal. Even for a normal doppler VOR, the cleared area around the facility has to be of a significant size. You can have obstructions, and most of the time it will be OK, but it's hard to predict beforehand just which obstructions can be safely tolerated. A couple of freight containers in the vicinity can muck up the signal. Now, imagine a traffic jam on the parkway full or trailers loaded with who knows what?

Also aesthetics, obviously.

Check this place out in Google Earth, while you're at it: 35° 23.353' N 97° 37.458' W.  

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Goldenshield
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Tue Jan 08, 2013 12:34 pm

Quoting FredT (Reply 4):
Check this place out in Google Earth, while you're at it: 35° 23.353' N 97° 37.458' W.

Would you actually believe that that is actually just a bunch of classrooms?


Doppler VORs are gaining in number, but you'd be surprised at just how many important VORs are still on the old non-doppler, such as Wasatch (TCH), and Daggett (DAG). Heck, there's even new installations using the old equipment that the dopplers replaced (such as the Low VOR (St. George - UTI) at the new St. George municipal airport, which was installed about 2 years ago.
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rfields5421
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Tue Jan 08, 2013 1:28 pm

Quoting FredT (Reply 4):
Check this place out in Google Earth, while you're at it: 35° 23.353' N 97° 37.458' W.

The more interesting structure is just about a half mile east, and a little to the north - with two jetways.
 
2H4
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Tue Jan 08, 2013 3:04 pm

Quoting rfields5421 (Reply 6):
The more interesting structure is just about a half mile east, and a little to the north - with two jetways.

Wow - a federal prison with its own jetways. Evidently, ATL isn't the worst place in the country to deplane, after all.
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Aaron747
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RE: What Is With The Mavrick (TTT / DFW) VOR?

Tue Jan 08, 2013 3:59 pm

Quoting rfields5421 (Reply 6):
The more interesting structure is just about a half mile east, and a little to the north - with two jetways.

Wow, now that is really something. This is why I love you guys and this forum.

Quite the coincidence as well - I just found a bunch of placenames on that very same map of the OKC area from the Elmore Leonard novel I'm currently reading.
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