This was pretty much covered in a thread about a week ago.
I simply don't know where to start with all the misinformation in this thread.
If you're anywhere within radio contact, air support will hit you like a bolt of lightning.
Groom security does not interact with the tourists. I believe getting hit by air security would be considered interacting with the tourists. If you
don't cross the border, all security does is watch you. They will run your plates.
Yes, you do need a police scanner of sorts, but don't think you're just gonna scan their frequencies willy nilly. Im sure they are heavily
encrypted, there are some encryption systems so advanced that they encrypt every single transmission in any given session with a different algorithm
each time the talk button is pressed.
Sigh. Encryption is DES on an EDACS trunk radio system. The encryption doesn't change with every transmission. I have no idea how often they change
The idea that a simple police scanner could work, is a bit skewed. The frequencies that the Police use range from, 0.3 - 465 (I believe it is Khz, but
I may be wrong) where as the military is going to be running at frequencies higher than these, which a normal scanner shouldn't be able to pick up.
The EDACS trunk radio system uses the federal UHF band, basically 406MHz to 420MHz. These frequencies are easily covered by conventional scanners, but
you can't get past the encryption.
A scanner can also pick up air traffic control, which uses similar frequencies as the military does, without any modifications. HF, and UHF
frequencies are different. UHF frequencies are for short range communications, and are what are used by police, air traffic control, and the military.
HF radios are used for transoceanic communications, and generally require a pretty big radio set (at least when I was operating a radio net they did).
As for the frequencies, they can be found online.
Well this is basically correct. ATC uses VHF and UHF frequencies. The military used to be UHF, but post 9/11 they put VHF radios in military aircraft
(as well as UHF) so that they can communicate to civilian aircraft. Note the military VHF band is extended a bit past the civilian VHF band. [Civilian
aircraft can't talk to Blackjack.] There is no need for HF to be used on the range, though for training, they use a few HF frequencies. The range
frequencies can be found here:
This list only contains frequencies that I have heard, trusted radio monitors have heard and given to me, or government documents. I do not troll the
internet for frequencies and list them since often people confuse Nellis with other sites such as Edwards or China Lake. There are many Nellis lists
on the internet, but they contain quite a bit of crap.
There are lists of the EDACS trunk radio frequencies, most of which are correct. I don't bother to list them since they can't be monitored. You can
do traffic analysis on the trunk control channels, but that is about it.
Again, they can't stop you from listening, except to encrypt them, which is what I said to begin with. But I have heard of Area 51 radio signals
being picked up in Las Vegas. They were faint, but understandable. The radios in question generally are blocked by line of sight, such as mountains,
but they CAN occasionally be picked up at much longer range than expected.
Also correct. The Janets certainly can be heard in Vegas, even after the Nellis ATC to Groom Lake approach handoff. In addition, Nellis and the DOE
use multiple transmitter sites around the range and near Nellis so that the base stations (ground) can be heard in Vegas. The DOE as far as I know
only "repeats" from the Apex transmitter site. ["Repeats" in quotes because the signals actually get to the remote transmitters using a radio link
backbone.] Nellis has multiple sites well outside the range, such as Mt. Ella.
Note that there are three trunk radio systems around the Nellis range plus Vegas. The EDACs system used by Groom has a repeater at Nelllis, sites
around range, and a repeater at Base Camp. The DOE and Nellis AFB share a P-16 Motorola trunk system with sites in the range, at Nellis AFB, Creech,
and the DOE facility in North Las Vegas. There is a new P-25 Motorola system slowly being set up around the range. I have only heard the DOE on it.
Nellis has been buying P-25 radios with AES-256 encryption.
The P-25 trunk radio system interferes with the P-16 (a few channels overlap). I believe the P-16 and most likely the EDACS system will be shut down
eventually and only the P-25 system will be used. That is just a guess, but I don't see the DOE using a P-16 and P-25 system simultaneously forever.
The EDACS system is very old.
There are 2 380MHz Navy "emergency" systems that can be heard in the range.