Author Topic: Found Sercret FAA radar in the woods of NH USA  (Read 6628 times)

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Offline yada

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Found Sercret FAA radar in the woods of NH USA
« on: June 12, 2017, 02:16:55 am »
I found this while hiking in the woods in New Hampshire US. Its an FAA facility, looks like it has a bunch of little antennas that bounce off that big cone in the middle. The metal grate that goes around it must be for RF because you couldn't walk on it. Has its own transformer with underground cables that come from a near by road. Uses a lot of electricity from the size of the transformer. Does anyone know what this is? Its kind of near a big airport on top of a hill. Strange that they didn't have power lines to it but I guess that's so ice doesn't knock out the power.  :-//
 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #1 on: June 12, 2017, 02:18:37 am »
Another:
 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #2 on: June 12, 2017, 02:20:12 am »
 :scared:
 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #3 on: June 12, 2017, 02:22:00 am »
 :bullshit:


I think this is a directed energy weapon that takes energy from your smart meter and penetrates tin foil hats. I saw an episode of VICE where a lady wears one to bed because she's a "targeted individual"

 
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Offline cdev

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #4 on: June 12, 2017, 02:23:21 am »
This is a VOR navigation facility. You see them on aero charts. They predate GPS.

https://en.wikipedia.org/wiki/VHF_omnidirectional_range

https://en.wikipedia.org/wiki/VOR/DME
« Last Edit: June 12, 2017, 02:27:29 am by cdev »
"What the large print giveth, the small print taketh away."
 
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Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #5 on: June 12, 2017, 02:30:54 am »
That's what they look like. I remember using VOR first time I flew before GPS. I thought they would just use a tower with an tenna at the top. What kind of antenna is that? Are the little domes the actual transmitters? Heading over to Wikipedia, I'll be back in a few hours clicking on links.
 

Online Nusa

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #6 on: June 12, 2017, 02:37:31 am »
Nothing secret about them. They're published on aviation maps, and are active radio beacons for anyone with the right receiver. A doppler VOR like in your pictures sends out a differently phased signal for each compass point, which means a VOR reciever will have a compass heading from the VOR without needing direction finding equipment.

GPS is great, but it has the potential for outages. Especially deliberate outages or degradation for military reasons. In aviation it's very bad not to have fallbacks, so I don't see the very successful VOR system going away soon.
 
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Offline rx8pilot

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #7 on: June 12, 2017, 02:37:49 am »
VOR is not particularly secret, LOL.

They have become almost completely backup navigation these days too. Still important, but an outage is unlikely to have any impact on a flight, much less create an incident or accident.
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Offline rx8pilot

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #8 on: June 12, 2017, 02:39:36 am »
They are not based on Doppler- but rather radial pulse timing. Very clever use of technology back in the day.
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Offline Dan Moos

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #9 on: June 12, 2017, 03:52:54 am »
Definitely a VOR station.

They are very much still in use, at least for general aviation stuff (think little Cessnas and the like)

The pilot has a receiver and an indicator. The station sends out a beam on that freq at each compass degree around the station. At least that is how it appears conceptually to the pilot. I forget how it actually works, but its timed pulses of some sort. These "beams" are called radials. Imagine spokes on a wheel.

So the pilot dials in the station's freq, and the radial he wants to navigate on. The needle on the indicator centers if you cross that spoke. So if you crossed it perpendicularly, it would briefly center as you crossed it. If you were aligned with it, and flying at the station, it would stay centered.

Most planes have two receivers, so you can triangulate using two stations.

Pretty crude by GPS standards, but not that difficult to use. When I flew, just about any plane you encountered was VOR equipped, but GPS receivers that were certified for aviation were crazy expensive. Maybe that's changed, but I'd be surprised. Anytime something has "aviation" in the title, you can plan on slapping another '0' on the end of the price.
 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #10 on: June 12, 2017, 04:19:00 am »
They are not based on Doppler- but rather radial pulse timing. Very clever use of technology back in the day.
The doppler signal encodes the station identifier, i(t), optional voice, a(t), navigation variable signal in c(t), and the isotropic (i.e. omnidirectional) component. The navigation variable signal is A3 modulated (greyscale). The navigation reference signal is delayed, t+, t?, by electrically revolving a pair of transmitters. The cyclic doppler blue shift, and corresponding doppler red shift, as a transmitter closes on and recedes from the receiver results in F3 modulation (colour). The pairing of transmitters offset equally high and low of the isotropic carrier frequency produce the upper and lower sidebands. Closing and receding equally on opposite sides of the same circle around the isotropic transmitter produce F3 subcarrier modulation, g(A,t).
t = t + ( A , t ) ? ( R / C ) sin ? ( 2 ? F n t + ( A , t ) + A ) t = t ? ( A , t ) + ( R / C ) sin ? ( 2 ? F n t ? ( A , t ) + A ) e ( A , t ) = cos ? ( 2 ? F c t ) ( 1 + c ( t ) ) + g ( A , t ) c ( t ) = M i cos ? ( 2 ? F i t )   i ( t ) + M a   a ( t ) + M n cos ? ( 2 ? F n t ) g ( A , t ) = ( M d / 2 ) cos ? ( 2 ? ( F c + F s ) t + ( A , t ) ) + ( M d / 2 ) cos ? ( 2 ? ( F c ? F s ) t ? ( A , t ) ) {\displaystyle {\begin{array}{rcl}t&=&t_{+}(A,t)-(R/C)\sin(2\pi F_{n}t_{+}(A,t)+A)\\t&=&t_{-}(A,t)+(R/C)\sin(2\pi F_{n}t_{-}(A,t)+A)\\e(A,t)&=&\cos(2\pi F_{c}t)(1+c(t))\\&+&g(A,t)\\c(t)&=&M_{i}\cos(2\pi F_{i}t)~i(t)\\&+&M_{a}~a(t)\\&+&M_{n}\cos(2\pi F_{n}t)\\g(A,t)&=&(M_{d}/2)\cos(2\pi (F_{c}+F_{s})t_{+}(A,t))\\&+&(M_{d}/2)\cos(2\pi (F_{c}-F_{s})t_{-}(A,t))\\\end{array}}}

where the revolution radius R = Fd C / (2 ? Fn Fc ) is 6.76 ± 0.3 m .

The transmitter acceleration 4 ?2 Fn2 R (24,000 g) makes mechanical revolution impractical, and halves (gravitational redshift) the frequency change ratio compared to transmitters in free-fall.
The mathematics to describe the operation of a DVOR is far more complex than indicated above. The reference to "electronically rotated" is a vast simplification. The primary complication relates to a process that is called "blending".[citation needed]
Another complication is that the phase of the upper and lower sideband signals have to be locked to each other. The composite signal is detected by the receiver. The electronic operation of detection effectively shifts the carrier down to 0 Hz, folding the signals with frequencies below the Carrier, on top of the frequencies above the carrier. Thus the upper and lower sidebands are summed. If there is a phase shift between these two, then the combination will have a relative amplitude of (1 + cos ?). If ? was 180°, then the aircraft's receiver would not detect any sub-carrier (signal A3).
"Blending" describes the process by which a sideband signal is switched from one antenna to the next. The switching is not discontinuous. The amplitude of the next antenna rises as the amplitude of the current antenna falls. When one antenna reaches its peak amplitude, the next and previous antennas have zero amplitude.
By radiating from two antennas, the effective phase centre becomes a point between the two. Thus the phase reference is swept continuously around the ring – not stepped as would be the case with antenna to antenna discontinuous switching.
In the electromechanical antenna switching systems employed before solid state antenna switching systems were introduced, the blending was a by-product of the way the motorized switches worked. These switches brushed a coaxial cable past 50 (or 48) antenna feeds. As the cable moved between two antenna feeds, it would couple signal into both.
But blending accentuates another complication of a DVOR.
« Last Edit: June 12, 2017, 04:21:11 am by yada »
 

Offline NivagSwerdna

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #11 on: June 15, 2017, 10:55:52 am »
Do you have the GPS co-ordinates?  It would be fun to find it on an aviation chart.
 

Offline sokoloff

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #12 on: June 15, 2017, 11:36:36 am »
Here's one that it might be:
https://goo.gl/maps/MG7qZFCYwWy

The coordinates of VORs are public information and can be easily accessed here: (among others)
http://airnav.com/navaids/
(The one above is "LEB", just northeast of Lebanon airport in NH.)
 

Offline German_EE

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #13 on: June 15, 2017, 06:42:26 pm »
t = t + ( A , t ) ? ( R / C ) sin ? ( 2 ? F n t + ( A , t ) + A ) t = t ? ( A , t ) + ( R / C ) sin ? ( 2 ? F n t ? ( A , t ) + A ) e ( A , t ) = cos ? ( 2 ? F c t ) ( 1 + c ( t ) ) + g ( A , t ) c ( t ) = M i cos ? ( 2 ? F i t )   i ( t ) + M a   a ( t ) + M n cos ? ( 2 ? F n t ) g ( A , t ) = ( M d / 2 ) cos ? ( 2 ? ( F c + F s ) t + ( A , t ) ) + ( M d / 2 ) cos ? ( 2 ? ( F c ? F s ) t ? ( A , t ) )

Of course, yes, quite clear.

 :scared:  :scared:  :scared:  :scared:

Now back to my downloaded copy of the Batman TV series and a large quantity of chocolate.
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Offline babysitter

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #14 on: June 16, 2017, 06:28:45 am »
Anything is a dildo.
I'm not a feature, I'm a bug! ARC DG3HDA
 

Offline Halcyon

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #15 on: June 16, 2017, 10:29:27 am »
They don't tend to put "secret" facilities near a walking trail, without CCTV and marked with signage.
 
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Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #16 on: June 16, 2017, 10:12:14 pm »
Here's one that it might be:
https://goo.gl/maps/MG7qZFCYwWy

The coordinates of VORs are public information and can be easily accessed here: (among others)
http://airnav.com/navaids/
(The one above is "LEB", just northeast of Lebanon airport in NH.)

No not that one. There is a baseball pitch nearby. I might have a pic with letters that were written on the side of the building. The town was called Londonderry NH. A few km <10? from MHT Manchester international airport in Manchester NH. IF you google map MHT then look east and slightly north you should be able to find it by a recreation area surrounded by woods and its in a field that's not well maintained with irregular outlines (not a nice circle from what I could see on the ground) You have to drive into the recreation area to get to the dirt road that leads to it. The top looks like those pictures on conspiracy web sites of phalanx (penis) figures.
 

Offline Howardlong

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #17 on: June 16, 2017, 10:34:37 pm »
If you have a VHF receiver with AM on it and scan 108-118MHz in 50kHz steps, you'll be able to find it, and it will ident in morse code.

As already mentioned, for its time VOR was pretty advanced. In the UK they are gradually disappearing due to maintenance costs and the move to GPS. Having said that, their positions have been so built in to air traffic procedures that their motional positions are used extensively for navigation even though many no longer physically exist.

 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #18 on: June 16, 2017, 10:46:16 pm »
I guess those little domes transmit at 50Hz rotating around to make it appear as if it was a spinning dish. Still don't know if that middle bit is a reflector or just another antenna all together. They should keep them incase an EMP solar flare disrupts GPS.
 

Offline yada

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #19 on: June 16, 2017, 10:49:54 pm »
I thought this was secret because they have new boston center which is a huge secret installation in New Boston NH. If you climb the right mountain you can look over into it. But sometimes when you climb up that mountain army guys with M16's will greet you and escort you the whole mile long hike down off of it. There are signs around it telling you that you can be shot on sight for entering. In the 1950's it was a UFO hot spot.
 

Offline sokoloff

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #20 on: June 17, 2017, 01:28:10 am »
Here's one that it might be:
https://goo.gl/maps/MG7qZFCYwWy

The coordinates of VORs are public information and can be easily accessed here: (among others)
http://airnav.com/navaids/
(The one above is "LEB", just northeast of Lebanon airport in NH.)
No not that one. There is a baseball pitch nearby. I might have a pic with letters that were written on the side of the building. The town was called Londonderry NH. A few km <10? from MHT Manchester international airport in Manchester NH. IF you google map MHT then look east and slightly north you should be able to find it by a recreation area surrounded by woods and its in a field that's not well maintained with irregular outlines (not a nice circle from what I could see on the ground) You have to drive into the recreation area to get to the dirt road that leads to it. The top looks like those pictures on conspiracy web sites of phalanx (penis) figures.
That's the MHT VOR then.

https://goo.gl/maps/Tfzb367oZm52

Frequency: 114.40
  Morse ID: -- .... -
 

Offline Howardlong

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #21 on: June 17, 2017, 06:03:48 am »
I guess those little domes transmit at 50Hz rotating around to make it appear as if it was a spinning dish. Still don't know if that middle bit is a reflector or just another antenna all together. They should keep them incase an EMP solar flare disrupts GPS.

The centre antenna carries the reference signal. As well as the morse beacon, it also transmits a subcarrier outside the usual AM bandwidth at 9960Hz which itself is FM modulated at 30Hz, the same frequency that the antennas on the periphery are successively transmitted on with exactly the same RF signal as the reference, 30 times a second, synchronised with the subcarrier's modulation.

The receiver receives three signals. There's the AM morse ident, the 30Hz reference signal from the 9960Hz subcarrier, AND the 30Hz modulation from the interference between the reference and rotating signals.

By measuring the phase difference between the 30Hz signal on the reference subcarrier, and the modulation caused by the interference between the reference and rotating RF carriers, also at 30Hz, you can figure out the bearing. Depending where you are around the beacon, that phase difference will change.
 

Offline Halcyon

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #22 on: June 17, 2017, 07:23:26 am »
I thought this was secret because they have new boston center which is a huge secret installation in New Boston NH. If you climb the right mountain you can look over into it. But sometimes when you climb up that mountain army guys with M16's will greet you and escort you the whole mile long hike down off of it. There are signs around it telling you that you can be shot on sight for entering. In the 1950's it was a UFO hot spot.

You'll find that most "top secret" locations that people know about, like Cheyenne Mountain (USA), Pine Gap and Woomera (Australia) and other sites such as headquarters for various organisations and those connected to"five eyes" are not much to look at. They essentially "hide" in plain sight. Not to say restricted and classified work doesn't occur there, but the building/locations themselves aren't covert, just the work that goes on inside them (and even then, a lot of the "stuff" gets shipped/transmitted/transported to other sites for more "stuff").

Meanwhile, while people focus on the big mysterious facilities various governments have, it takes a lot of the heat off actual covert locations (the ones you aren't aware that they exist). A lot of interesting work happens behind closed doors which appear like normal, everyday boring offices, retail centres and industrial complexes. I guarantee you've walked or driven past one at some point and not bat an eyelid.
« Last Edit: June 17, 2017, 07:26:06 am by Halcyon »
 
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Offline John Coloccia

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #23 on: June 17, 2017, 11:56:44 am »
I thought this was secret because they have new boston center which is a huge secret installation in New Boston NH. If you climb the right mountain you can look over into it. But sometimes when you climb up that mountain army guys with M16's will greet you and escort you the whole mile long hike down off of it. There are signs around it telling you that you can be shot on sight for entering. In the 1950's it was a UFO hot spot.

You mean this "secret"?

https://en.wikipedia.org/wiki/New_Boston_Air_Force_Station

That's not very secret either. You're just not allowed to go there, just like a lot of other military installations.
 

Offline Augustus

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Re: Found Sercret FAA radar in the woods of NH USA
« Reply #24 on: June 17, 2017, 12:28:01 pm »
Psssst... Secret nuclear bunker is secret 

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