Tracking Space Station Voice Transponder and APRS using Gpredict, RTL-SDR and 40-10m fan dipole

There was a 49 degree maximum elevation pass of international space station here. Decided to track it with Gpredict, RTL-SDR and 40-10m inverted V fan dipole antenna. During the first half you can see tracking of voice transponder downlink frequency. Later I switched over to the APRS frequency, which was also tracked well with signals noted on the waterfall display of SDRSharp software by Airspy. Due to some configuration problem with the newly installed virtual audio cable, voice signals could not be captured!