On Mar 17, 2009, at 6:09 AM, MM wrote:
Link to audio: http://www.savefile.com/files/1655618
One aircraft in recording: http://registry.faa.gov/aircraftinquiry/NNumSQL.asp?NNumbertxt=38U&cmndf...
Jody North Georgia
Hi Jody,
Interesting recording.
The female voice clearly says, "Calling today, this is Memphis Center?"... a Center controller picking up an aircraft in-flight, probably for VFR "flight following" services, or she just missed a call-up. Standard phraseology. Seems to match the "flight following" thing since then...
The analysis of the tail number is incorrect. Later she talks a couple of times to "Cessna 38U".
Tail numbers on-air are shortened to the last three characters of the tail number, if no conflicting callsigns are on the frequency -- to save airtime. Therefore that's not "N38U" as the full callsign (a glider based out of Boulder, CO as you noted with the FAA registry), but is a Cessna with a tail number ending in 38U, flying somewhere in Memphis Center's controlled airspace.
At one point the flow of the conversation through standard phraseology would indicate that the Cessna or another aircraft she's talking to is at 5500' MSL. Making her a "low-altitude" sector at Memphis, or dual- controlling (transmitting on more than one frequency) multiple sectors, depending on time of day and traffic load.
There's also communications with a King Air, but I need to go get the headphones out to pick that callsign out.
http://microvoltradio.com/ARTCC/KZME.htm
Right at the very end you also hear an aircraft call up "right downwind", likely ISS has moved far enough East that Memphis Center can no longer be heard, and the frequency is re-used by the FAA at a towered airport somewhere further East.
At the very beginning of the recording, it sounds like the receiver is wide enough that it's hearing some other stuff that's not on its center frequency on the West Coast... or wherever the ground track took ISS this particular day and time of this recording.
Thanks for sharing, neat to listen to...
-- Nate Duehr, WY0X [email protected]