In rec.radio.amateur.space Radium
gmail.com> wrote:>> In rec.radio.amateur.space Radium
gmail.com> wrote:
>>>>> Hi:
>>> Do magnetars emit AM radio waves below the medium-wave range? If so,
>>> how do we detect these waves? Can these waves be heard on the AM
>>> radio? If so, what do they sound like?
>>
>> Frequencies above approximately 100 MHz almost always get through
>> the ionization layers.
>>
>> Frequencies in the approximate range of 10 MHz to 100 MHz sometimes
>> get through
>>
>> Frequencies below approximately 10 MHz almost never get through.
>>
>> So, if by "the AM radio" you mean a Broadcast Band radio which
>> runs from about .5 MHz to 1.2 MHz, not a chance in hell of ever
>> hearing anything from off the planet.
>>
>> Try again.
> Okay. But what if this is a supercooled AM radio receiver on a
> spaceship orbiting Earth? If I am on a space station like MIR and this
> station has a supercooled AM radio 44.1 KHz frequency receiver, will I
> hear anything specific of magnetars?
Generally, super cooled electronic components stop working.
Try again.
> 44.1 KHz is the carrier-frequency this hypothetical receiver receives.
A super stupid frequency to pick. Generally for listening for natural
phenomena, you want a wide as possible bandwidth given the noise
floor.
> I place the frequency of this hypothetical AM radio carrier wave at
> 44.1 KHz for the same reason CDs use a sample rate of 44.1 KHz -- it
> is the minimum required to prevent aliasing.
Yeah, for digitized, audible music, you twit.
Are you expecting to hear alien rock and roll?
An AM receiver isn't digitizing anything, sample rates don't apply,
and aliasing doesn't apply.
Try again, idiot.
> AFAIK, space station orbit earth above the ionosphere so the
> limitations [preventing long-waves from outer space from reaching the
> Earth's surface] do not apply.
Probably the only thing you got right.
--
Jim Pennino
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