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What Is With The Mavrick (TTT / DFW) VOR?  
User currently offlineweb500sjc From United States of America, joined Sep 2009, 749 posts, RR: 0
Posted (1 year 10 months 3 weeks 1 hour ago) and read 3802 times:
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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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8 replies: All unread, jump to last
 
User currently offlinePHLapproach From Philippines, joined Mar 2004, 1246 posts, RR: 18
Reply 1, posted (1 year 10 months 3 weeks ago) and read 3739 times:

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.

User currently offlinerfields5421 From United States of America, joined Jul 2007, 7607 posts, RR: 32
Reply 2, posted (1 year 10 months 2 weeks 6 days 22 hours ago) and read 3594 times:

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]

User currently offlineIAHFLYR From United States of America, joined Jun 2005, 4790 posts, RR: 22
Reply 3, posted (1 year 10 months 2 weeks 6 days 19 hours ago) and read 3534 times:

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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User currently offlineFredT From United Kingdom, joined Feb 2002, 2185 posts, RR: 26
Reply 4, posted (1 year 10 months 2 weeks 6 days 18 hours ago) and read 3500 times:

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.  

Cheers,
/Fred



I thought I was doing good trying to avoid those airport hotels... and look at me now.
User currently offlineGoldenshield From United States of America, joined Jan 2001, 6094 posts, RR: 14
Reply 5, posted (1 year 10 months 2 weeks 5 days 4 hours ago) and read 3330 times:

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.



Two all beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun.
User currently offlinerfields5421 From United States of America, joined Jul 2007, 7607 posts, RR: 32
Reply 6, posted (1 year 10 months 2 weeks 5 days 3 hours ago) and read 3318 times:

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.


User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Reply 7, posted (1 year 10 months 2 weeks 5 days 2 hours ago) and read 3289 times:
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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.



Intentionally Left Blank
User currently offlineAaron747 From Japan, joined Aug 2003, 8220 posts, RR: 26
Reply 8, posted (1 year 10 months 2 weeks 5 days 1 hour ago) and read 3278 times:

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.



If you need someone to blame / throw a rock in the air / you'll hit someone guilty
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