finally I finished my DIY GNSS. I would like use It as lap timer in Motorsports. It works 20Hz and should receiver GPS+GLONAS+BeiDou. I tried It yesterday and look like work fine.
I noticed that travel of narrow turns or in small circuit the performas are less stable that in straight line or wide turns.
I would like to comper whit racebox mini or QSTARZ (BL-1000GT). Does someone have an session ?