Planning for the August 21 Solar Eclipse

[Martin]

Hi Bill,

Thanks for the additional info.  Undersampling the phone input is a great
idea.  I would expect that the phone's audio input circuit would have an
anti-aliasing filter but I guess not.

73 Martin W6MRR

On Sat, Mar 4, 2017 at 2:01 AM, Bill Liles <lilesw at gmail.com> wrote:

> Folks, EclipseMob is currently developing software to run on Android and
> iPhones. The receiver plugs into the microphone jack of the smart phone.
>
> Martin is correct that EclipseMob is interested in having many people
> collect time/amplitude data of WWVB at 60 kHz.
>
> The maximum sampling rate to be on all cell phones is 44.1 kHz.
>
> The software takes advantage of undersampling the 60 kHz signal and that
> there are not very many transmitters in that freq range so the subsampled
> 60 kHz signal does not fold onto another signal.
>
> And as Martin stated, the receiver can also be used with a sound card. I
> have a sound card that samples at 192 kHz.
>
> Martin asked if there are other efforts. One other effort is Radio Jove in
> which a number of folks will be recording data from Jupiter in the HF band.
>
> Hope the above is useful.
>
> 73,
> Bill Liles, NQ6Z
> On Fri, Mar 3, 2017 at 8:49 PM Martin <dcmk1mr2 at gmail.com> wrote:
>
>> From the Feb 2017 QST:
>>
>> The Solar Eclipse QSO Party
>>
>> http://edition.pagesuite-professional.co.uk/html5/
>> reader/production/default.aspx?pubname=&edid=0b82bd38-
>> ecee-4bb0-92f4-4649b95a8c7f
>>
>>
>> The Eclipse Mob project may be of interest to LF'ers.  The idea is to
>> copy WWVB during the eclipse.  They have a suggested a loop antenna and
>> receiver design but rest of the picture is missing.  I'd assume you'd use a
>> PC sound card that can go beyond 60 kHz (they exist) and use software to
>> copy the signal.
>>
>> http://eng.umb.edu/~eclipsemob/
>>
>> Anything else?
>>
>> 73 Martin W6MRR
>> _______________________________________________
>> Tacos mailing list
>> Tacos at amrad.org
>> https://lists.amrad.org/mailman/listinfo/tacos
>>
>
> _______________________________________________
> Tacos mailing list
> Tacos at amrad.org
> https://lists.amrad.org/mailman/listinfo/tacos
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.amrad.org/pipermail/tacos/attachments/20170304/9b6d507f/attachment.html>