KB4XR

Record data from kiwiSDR and analyze it using SCILAB tools to correct for sample rate error, and create an envelope for the pulses by overlapping the magnitude (using Hilbert transform) of several 1 second captures. Tune to RWM pulses on VFO B and also create envelope for PPS measurements. Thank you for the tour. It was more work than I had planned for, but I have learned a lot. (I hope I haven't been careless on this last tour.) I didn't want to resort to a kiwi but my reception in NA was nonexistent in any band for the last two tours.

Using KiwiSDR because I could not receive even a hint of your 20M transmission in Virginia (USA). Analyzing recorded data using Spectrum Lab and SCILAB tools as well as Sound Forge. Set VFO B on kiwi to RWM to get PPS reference. I have no characterization of the kiwi but I think I have good results. It is nice to have a signal not buried in the noise by 40 dB. Thank you for running this. It's always a challenge. This time a completely new one by having to use a kiwi.

Record entire 20+ minutes and analyze using SciLab tools. Use Calibration waveform for doppler reference. GPSDO for rig offset. CHU Canada for PPS Was able to use the transmission schedule effectively. THANK YOU for that! About 1.4 Hz of doppler. Noisy in NA as in the previous tours. Makes pulse measurements extremely difficult. Averaging 350 pulse envelopes but even then the pulses are barely distinguishable unless heavily filtered. But then the rise/fall edges are smeared. Rig PPM is corrected in SciLab using CHU pulse times at start and end of test.

Recorded audio from FT-710. Using SCILAB to: correct audio for ppm sampling error, BPF to remove QRM, analyze spectrum of CW, overlap multiple seconds of time domain to extract pulse edges. Using CHU Canada for PPS. Using Bodnar GPSDO to correct rig tuning error. Received FMT signal deep in the noise. Similar to Tour 2. No luck with RWM reception. I've improved my analysis tools but if probably not accurate to better than a couple milliseconds. Thanks for the calibration signal to help identify doppler. Thanks again for putting it on!

Recorded SSB audio, switching in GPSDO +500 Hz for reference. Tuning to CHU Canada for PPS. Signal deep in the noise and recognizable. only briefly over 15 minutes. Using SCILAB tools for bandpass filtering - but extreme multipath fading present. Much of this is a guess.

Recorded audio from FT-710 with GPSDO freq reference 500Hz above received signal on SSB upper w/recv tuned to 14052000. GPSDO was not used for PPS measurement. That was done by tuning to CHU Canada time reference before stopping the recording. There was significant fading and QRM during the test. The received signal was deep in the noise and extracted using MATLAB tools for filtering and observing the time signal. Thank you for the test. Learned a lot!