handbook/tools/Others/Radio/GPS-Spoofing.md

With the HackRF One it is posible to send a fake GPS signal to other devices.

You need the following parts:
– HackRF One (can also be a Chinese clone)
– External TCXO (as GPS needs high precision)
– Antenna (best is a dedicated GPS antenna)
– GNU Radio and HackRF tools

sudo apt install gnuradio libhackrf0 hackrf libhackrf-dev

Check if you see 0x01 with (means TXCO is installed):

hackrf_debug --si5351c -n 0 -r

1. Download the GPS-SDR-SIM software

mkdir GPS_SDR_SIM

cd GPS_SDR_SIM

git clone https://github.com/osqzss/gps-sdr-sim.git

2. Compile it

make

3. Get the current satellite positions from NASA
   New: Updated URL, 03.03.2021 (Thanks for the information Ye-Sheng Kuo)

Create an account on https://urs.earthdata.nasa.gov/ Make a file called .netrc with the following content:

machine urs.earthdata.nasa.gov login actedlinux password Asdfghjkl007

3. Change the file permission with

sudo chmod 004 .netrc

4. Generate the signal file with the static position (coordinates) you want to send

./gps-sdr-sim -b 8 -e YOUR_BRDC_FILE_HERE -l 40.812800,-60.005900,100

5. Send the signal

sudo hackrf_transfer -t gpssim.bin -f 1575420000 -s 2600000 -a 1 -x 0