From your friends at ATCMonitor.com.  © 2006 - Reproduction without permission is prohibited.

The frequency you are listening to is 121.35.  The controllers call the sector LOGEN.   LOGEN is the final intersection along the Macey arrival (see below).  The LOGEN name comes from the town of Loganville GA which was probably the closest town to this intersection at the time the arrival was first published many many years ago. 

This frequency you are listening to handles some of the heaviest air traffic in North America every day.  The majority of this traffic is approaching Atlanta from the northeast headed southwest down the Atlanta 041 VOR radial. 

The traffic comes down into Atlanta via the Macey Standard Terminal Arrival (STAR).  The FAA publishes Standard Terminal Arrival Procedures (STARs) for busy traffic areas so that both pilots and controllers know what to expect during the transition from out of high altitude enroute airspace to terminal approach areas. 

On the above MACEY STAR, you can see that aircraft can "join" the arrival from a number of transitions.  The objective for the controller working this frequency is to organize all of this transitioning traffic into a managed flow down the arrival so that when the traffic crosses the WOMAC intersection when landing west, turbojet traffic is at 13,000 feet and 250 knots as indicated on the arrival plate above.  When landing east, turbojet traffic crosses the LOGEN intersection at 14,000 feet and there is usually no speed restriction.  Crossing altitudes for smaller turbo prop aircraft are also listed above on the STAR.

The controller working this sector must contend with Macey arrivals, departures, satellite traffic coming down the AWSON Arrival, overflights, military traffic, weather, and overall heavy volume.  All of these challenges and the sheer volume that the sector experiences every day makes it one of the busiest air corridors in the world.