Testing per-sample IQ Doppler correction in SpectraFlux. Satellite tracking software sends frequency updates via rigctld — instead of retuning the SDR (which causes PLL transients and audio glitches), the correction is applied as a phase-continuous NCO rotation on every IQ sample. SDR parks at a clean center frequency, Doppler offset handled entirely in the digital domain. Zero retune latency, no phase discontinuities. Here's a Python script driving a ±50 kHz sinusoidal S-curve through rigctld while the spectrum tracks it smoothly. SpectraFluxのIQドップラー補正をテスト中。 衛星追尾ソフトからrigctldで周波数更新を受信し、SDRの再チューニングではなく、IQサンプルごとにNCO位相回転で補正を適用。PLLの過渡応答やオーディオの途切れがゼロ。Pythonスクリプトで±50kHzの正弦波ドップラーカーブをシミュレーションしています。

Riding the FM station! Will have to add some avionics.

If you are into SDR, buy a Mac mini. Go into debt if you have to.Or a Studio. You'll want it for what's coming. SpectraFlux beta is up. Apple Silicon only. No support. rfspace.com/RFSPACE/SpectraF…

📡 New: CloudSDR Protocol Emulator 🐍 Python framework for SpectraVue integration 🔓 Bypasses SpectraVue hardware checks 🛠️ Starting point - extend for RTL-SDR, HackRF, etc. 📊 Dummy I/Q included, add your radio's data stream Build your own SDR bridge! github.com/ibelinp/CloudSDR-…

playing with a "QRM Eliminator" using the @rfspace NetSDR-X2 with an active whip for noise antenna and internal phase/amplitude adjustment inside the SDR.