EVA news from the International Space Station

[metavac]

This story caught my eye:

Cosmonauts to Install More Debris Panels on Wednesday Spacewalk

Expedition 15 spacewalk Two International Space Station cosmonauts will begin a spacewalk of a little over five hours from the Pirs docking compartment airlock about 10:30 a.m. EDT Wednesday. They will install a section of Ethernet cable on the Zarya module, install additional Service Module Debris Protection (SMDP) panels on Zvezda, and deploy a Russian scientific experiment.

Image to right: Flight Engineer Oleg Kotov (left) rides on the end of the Strela crane with a bundle of debris panels as Commander Fyodor Yurchikhin operates the controls. Image credit: NASA TV

Five SMDP panels were installed by station Commander Fyodor Yurchikhin and Flight Engineer Oleg Kotov on May 30. During that 5-hour, 25-minute spacewalk they also rerouted a Global Positioning System antenna cable. On Wednesday they will install 12 additional panels. They also will install the Ethernet cable on the Zarya module and a Russian experiment called Biorisk on Pirs.

Briefing multimedia here.

Crew timeline for 30 May 2007 here (PDF). If you're interested, there's an entire section dedicated to crew timelines.

Question for knowledgeable people. How do you estimate the amount of debris influx for a given orbit?

[Broomstick]

I suspect that at this point we have some empirical data on which to base and educated guess