开云体育

开云体育

Andy analogue filtering needs to be quite slow to remove that kind of noise. In the 2000s I was doing similar recording on 136kHz, and most of the noise was distant lightning. I chose to take 6 readings at 2 sec intervals and only save the lowest which became the reading for the mid point of the 6 readings. This was based on the idea that there may be gaps between the strikes. However ideally the filtering before digitisation should not be too narrow because that will spread the width of the pulses. This is not usually provided as a filter so you may need to experiment with you receiver and software to use it. I found RSP only provided averaging which is not the best solution.

Best Wishes
Alan G3NYK