---------- Původní zpráva ---------- Od: M. Watanabe Komu: moon@moonbounce.info Datum: 21. 3. 2014 5:39:42 Předmět: [Moon] 77GHz Jupiter noise Hello Sergei, Al, Peter and all: In the TECHNICAL article of 432 & Avobe News of Feb./March issue, Sergei RW3BP writes his Jupiter noise measurement for 7 7GHz receiving evaluation. It looks so fascinating to me and I have written an article on it in my EME column for JA CQ magazine, April 2014 issue.... In his system Sergei detected Jupiter noise of only about 0.0035 dB(!) measured with CT1DMK noise meter in 40 MHz bandwidth in 400 MHz IF. Sergei concludes his receiving system shows his 2.4m offset antanna has a -3 dB beamwidth 0.11x0.12 deg. He continues it was impossible simply to point antenna by maximum of noise in real time. I think it must be an amazing results, but one question comes up to me. How can he measure -3 dB beamwidth using 0.0035 dB Jupiter noise? He says he cannot point his antena in real time. I guess it takes more time to measure it accurately. So I hope Al would compile the next 432 and Above News dealing with more Juuntil noise measurement until April 1, or so.... Mike JH1KRC