Ascoltare le sonde marziane

Posto qui per non inquinare i vari thread delle sonde marziane, ma anche i radioamatori sono in ascolto.

https://spaceweather.com/archive.php?view=1&day=17&month=02&year=2021

" “It helps to have a big antenna,” says Tilley, who uses a 60 cm dish, pictured above. “But the real key,” he says, “is the advent of Software Defined Radios (SDRs), which have become the norm for hams in the past decade or so.”

In a Software Defined Radio, computers digitally perform the signal mixing and amplification functions of circuits that used to be analog; software has replaced hardware. SDRs are cheap, sensitive, and they give hams the kind of exquisite control over frequency required to tune into distant spacecraft.

In a Software Defined Radio, computers digitally perform the signal mixing and amplification functions of circuits that used to be analog; software has replaced hardware. SDRs are cheap, sensitive, and they give hams the kind of exquisite control over frequency required to tune into distant spacecraft."

Avere una grande antenna aiuta, ma la chiave è stato l’avvento delle tecniche di Software Defined Radio, rese disponibili ai radioamatori una ventina di anni fa.
Forse qualcuno di voi ricorderà che alla prima Astronauticon a cui ho partecipato (2012?) parlai dell’ascolto della Voyager 1 con un ricevitore SDR :wink:

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