[amsat-bb] Re: Easy Mode S

[Yoshihiro Imaishi <imaishi@xxxxxxxxxxxx>]

Hi this is Yoshi.

At 2001/03/26 01:38:38 Gary "Joe" Mayfield wrote:
> Which is the easiest Mode S to hear?  AO-16, UO-11, AO-40?

  AO-40 is the easiest (during MA 250-10 only :-p).

  I tried to hear both UO-11 and AO-16 with my 29ele loop yagi and
modified 2880, but there was too weak to hear (just above the noise
level) and the doppler shift was too much fast to chase.
  I can hear the AO-40's S2-MB at S7-9 peak with same antenna and
rigs. The chance of AO-40 is limited but easy to hear.

> DO I have their frequencies correct?
> 
> AO-40  2401.323
> AO-16  2401.1428
> UO-11  2401.500

  Maybe it is correct. But do not forget about doppler shift.

> I know what AO-40 will sound like.  What would the others sound like?
> Should I be listening in USB, LSB, FM?

  The signals of UO-11 and AO-16 is too weak for me, so I heard
them just only as pure carrier signal. UO-11's is maybe so, but
I think the AO-16's is psk modulated. Anyway you should use USB
(or LSB) mode to hear them.


Yoshihiro Imaishi JF6BCC/KH2GR
mailto:jf6bcc@jarl.com or jf6bcc@jamsat.or.jp
<http://plaza16.mbn.or.jp/~palau/> Sorry, Japanese only now.
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