??? reguarding the ARTCC FILES

[JLM7424]

OK i ,am wondering what the meaning is in the artcc files

LOW = low altitiude? low power ?

HI= SAME ?

DISCRETE ?

IF IT'S UHF IS IT ONLY MILITARY ?

DOES MILITARY USE ANY OF THE VHF FREQS?

THANKS MATT.

[ka3jjz]

Originally Posted by jlm7424

OK i ,am wondering what the meaning is in the artcc files

LOW = low altitiude? low power ?

HI= SAME ?

DISCRETE ?

IF IT'S UHF IS IT ONLY MILITARY ?

DOES MILITARY USE ANY OF THE VHF FREQS?

THANKS MATT.

In general - LOW is low altitude, HIGH is above a certain altitude. Discretes are often used to move traffic onto a little used frequency to relieve congestion. Yes, UHF freqs are often used by the milcom stuff, but they do on occasion use VHF, particularly when they coordinate with approach, departures or towers having to go though civilian airspace. Many towers can hear and retransmit on UHF, but the smaller facilities may not have the capability.

Also be sure to ignore an of the FAA ATA100 listings. They tend to be out of date.

73 Mike

[JLM7424]

Originally Posted by ka3jjz

Also be sure to ignore an of the FAA ATA100 listings. They tend to be out of date.

73 Mike

So what do i rely on then ?

[ka3jjz]

I can't quite figure out which ARTCC center(s) would cover your area. However most (but not all) of the ARTCC listings in the database start with the ATA100 data dump, and that's followed by other information submitted by other folks. That's the data to which you want to pay attention.

If you're covered by the Chicago ARTCC, I'd check with the CARMA website (and the Illinois forum) and see what they have. If you're covered by the Minneapolis ARTCC, the ScanFan website (and the Minnesota forum) would be where I would go. A little digging is in order 73 Mike

[DaveNF2G]

Low - Low altitude, below 18,000 feet.
High - High altitude, above 18,000 feet.

I don't know whether there is any connection, but half of the mass of Earth's atmosphere is below 18,000 feet.

Discrete - a frequency with only one use, not paired.
UHF is used only by military aircraft, but military flights can use either VHF or UHF.

The most reliable ATC frequency guides are lists made by people who listen. The aviation frequencies are the easiest to discover as controllers give out frequencies on every handoff (and the pilots repeat them back).

[markinillinois]

Low altitude airways (V-routes) are below 18,000 feet, but ARTCC low altitude sectors are below 24,000 feet. High altitude airways (J-routes) begin at 18,000 feet, but ARTCC high altitude sectors begin at 24,000 feet.

Mark Holmes
Marion, IL

[davidp124]

0-FL239/lo altitude, FL240-FL349/hi altitude, FL350->ultra-hi altitude.

[ColoradoRedlands]

Originally Posted by markinillinois

Low altitude airways (V-routes) are below 18,000 feet, but ARTCC low altitude sectors are below 24,000 feet. High altitude airways (J-routes) begin at 18,000 feet, but ARTCC high altitude sectors begin at 24,000 feet.

Mark Holmes
Marion, IL

The Low and High Sectors can vary by Center. Here, the Denver Center Low sectors are up to FL260, and the High Sectors begin at FL270. Sometimes an area has a 3rd level (Ultra High) which starts here at FL370.

Then there is always the one sector per center for above FL600.

Chris
Grand Junction, CO

[JLM7424]

Great Info again thankyou all.. What is typical FL for military excersise like F-16's any idea ?

[DaveNF2G]

Military aircraft in transit are treated almost like any other flight. They use whatever altitudes are available until they reach designated military airspace where they conduct their training operations.

[musicman1260]

Military aircraft altitudes depends on what they are doing,Training,Pilot Training,Bomb runs or A/A combat Training,just look for those areas near you.