Using the following:
- i3 8Gb Windows 8.1 PC
- HDSDR
- Nooelec SMART IV RTL-SDR
- homebrewed 430MHz HB9CV
- and RS-41 Tracker - from IW1GIS webpage
I have been able to track a number of locally - Larkhill, Salisbury Plain - launched balloon which use the Vaisala RS-41 radio sonde to transmit atmospheric data.
The signals are quite weak, at 50mW, but trackable due to their being no physical obstructions between the sonde and the receiving antenna.
RS-41 Tracker will feed APRS.FI with GPS data, if you enter a suitable APRS level 2 server account code.
Click on the images to see them full size! 😉
