Station Commander Peggy Whitson and Flight Engineer Dan Tani will perform the 100th spacewalk in support of International Space Station assembly on Tuesday, Dec. 18. They will inspect the starboard Solar Alpha Rotary Joint (SARJ) and the Beta Gimbal Assembly (BGA). The SARJ and BGA have been temporarily locked in place while the solar arrays still produce power.

Whitson and Tani completed a procedure review on Friday and held a tagup with the lead spacewalk officer on the ground.

Kirk Shireman, station program deputy manager called the spacewalk a "fact-finding mission." The spacewalkers will report back to ground controllers what they find and return a trundle assembly back inside the station. Specialists on the ground will use the results to determine how to restore the starboard solar array's sun-tracking capability.

I've recently been experimenting with igates and satgates to receive APRS packets digipeated via the ISS.

I've devised a mobile set up using a Yaesu FT-8100R and an Open Tracker 2 to act as a digipeater to relay ISS packets on 145.825 MHz to the terrestrial APRS network on 144.800 MHz (or 145.390 MHz in the US).

With three radio memory channels and two profiles on the Open Tracker 2 it can now operate as a mobile terrestrial tracker, mobile ISS tracker, portable terrestrial digipeater or mobile satgate.

Rather than try and explain in on the forum I've added a page to my web page to describe the setup.