rtl-sdr.com

It's more about the quality of the power supply than the total amperage. Some supplies say 3A, but in reality can't handle more than 1A.

DId you try troubleshooting with rtl_test? Can you run four instances of rtl_test at the same time?

What type of RTL-SDR do you have?

LO is the local oscillator frequency. It's what the tuner in the SDR is actually physically tuning to, and that will be the center of your spectrum display. You can then tune digitally within the SDRs bandwidth without needing to change the LO. Bandwidth and sample rate are intertwined. On the RTL-S...

Unfortunately probably a dud if it doesn't show up on anything. I'll reply to your email too and send a replacement.

Those were just warnings, not errors. So the install completed successfully.

Edit run.sh and enable the logging. See if there are any runtime errors being generated when you try to click start processing.

Thats clear so far, but how do I control the noise source andetc via gnuradio? Is there even need for that or does kerberos sdr start of coherent right away? Kerberos is not coherent by itself, the sample and phase sync comes from the software. So in GNU Radio you'd have to build a flowchart to do ...

Antenna spacing is going to be the major issue. When you start to go below ~50 MHz other methods tend to become more practical.

But if you're able to get decent spacing, and gather data from multiple locations, it should average out the innaccuracies from not having a full sized array.

Did Zadig complete and actually install the WinUSB driver? What does it say on the left of the arrow in Zadig after installing?

What software are you running with the dongle? Remember that the EEPROM settings will only be recognized if you are using the rtl-sdr-blog drivers together with your software. Instructions for using the rtl-sdr-blog drivers with SDR# are written in the github readme https://github.com/rtlsdrblog/rtl...

TDOA would require multiple units spread out over some distance and networked. KSDR doesn't use TDoA.

THe burst size of ADS-B packets is quite short so it's a challenge, but it could be possible to get a bearing with updated code.