Say "Hi" to Juno


Już wiem.... byłem w błędzie..... można zacząć nadawanie do JUNO z SP już o 18:00 UTC:

At the frequencies we are using for this activity, the ionosphere will refract the signals and give them the ability to bend over the horizon, so the spacecraft will be "visible" even with a negative elevation angle.

Propagation of radio signals at 28MHz is quite variable and we have no way of predicting what conditions in the ionosphere will be like on October 9. Our plan is to pump as much power into the ionosphere as possible and hope the spacecraft can detect it. At closest approach, Juno will just be skimming the top of the F layer, so even if there is not enough ionization to bend the waves back to the ground, we think Juno has a chance of detecting waves from transmitted from almost anywhere on the globe.

We hope that stations will be able to participate for the entire event (2 hours, 40 minutes), but we can offer a few suggestions for those who cannot participate for the entire duration. Stations in North America probably have the best opportunity on the inbound pass. They will be in daylight, and Juno does not enter eclipse until shortly before C/A. It will be night for European stations, but there should be sufficient ionization to reach the spacecraft on both inbound and outbound segments, with more difficulty at closest approach. The best location would be the southern part of Africa, as the spacecraft will never be far below the horizon and the range at closest approach will be under 1240 miles (2000 kilometers)! Asian and South Asian stations probably have the best opportunity on the outbound leg.


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