fren6

3 ms·

1. 1.▲
   by fren6 2y ago

   Did you use 35dBi antennas on both sides (satellite and mobile phone)?
2. 2.▲
   by fren6 2y ago

   On the contrary, I've used the standard "free space path loss" formula, aka path loss in vacuum. You'd have to add additional losses for water vapor and atmosphere, I have no idea how much additional loss they would incu
3. 3.▲
   by fren6 2y ago

   Path loss for 2.4 GHz at 600km is 155dB. BLE tx power is 10dBm, sensitivity is -103dBm. There is 155-113=42dB missing. I guess they get 21dB from directional antenna, another 21dB from message coding (essentially repeating each bit 128 time