[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Noises on 435.215 ?



I believe that Unisat3 was also heard on 435.230MHz 9k6 GMSK shortly after 
its launch on the same vehicle as AO51.

My records indicate that it would transmit for up to 8 mins after passing 
over the command station in Rome.

They also suggest that it can be configured to act as V/U FM repeater but 
this "fact" is not confirmed!

73

Graham G3VZV


----- Original Message ----- 
From: "Andrew Glasbrenner" <glasbrenner@mindspring.com>
To: "Howard Long" <howard@howardlong.com>
Cc: <amsat-bb@amsat.org>; <graham@shirville.com>
Sent: Friday, December 30, 2005 3:32 PM
Subject: RE: [amsat-bb] Noises on 435.215 ?


> UNISAT-3 had/has a 9k6 GMSK transmitter on 435.275...if not it, maybe part 
> of the same "family"? I'm not in front of my home PC with a tracking 
> program, but how do the reports match the orbit for UNISAT-3?
>
> 73, Drew KO4MA
>
> -----Original Message-----
>>From: Howard Long <howard@howardlong.com>
>>Sent: Dec 30, 2005 10:04 AM
>>To: Paul Luggar <luggsey@hotmail.com>, Dave G1OCN <dave@g1ocn.com>, 
>>david.barber@dbelectronics.co.uk
>>Cc: amsat-bb@amsat.org, Neil Melville <nmelville@freenet.co.uk>, 
>>graham@shirville.com
>>Subject: RE: [amsat-bb] Noises on 435.215 ?
>>
>>Folks
>>
>>A real shot in the dark, thinking out loud. If it is Mobitex then it's 
>>9600
>>GMSK. Adding two and two together and probably making five, didn't one of
>>the recently released satellites (NCUBE-2) use a CMX589a chip that pops 
>>out
>>GMSK a la mobitex?
>>
>>The downsides: The NCUBE2 downlink should be 437.305 though - but if it 
>>uses
>>a frequency agile exciter that may account for that. The 21:47 LOS Dave
>>G1OCN gives in the UK would make it about 40 mins ahead of SSETI Express -
>>way to far ahead according to the recent reports of slowly moving object
>>(0.35 mins ahead at only 0.58 meters/sec delta v).
>>
>>73, Howard G6LVB
>>
>>-----Original Message-----
>>From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
>>Behalf Of Paul Luggar
>>Sent: 30 December 2005 12:39
>>To: Dave G1OCN; david.barber@dbelectronics.co.uk
>>Cc: amsat-bb@AMSAT.Org
>>Subject: Re: [amsat-bb] Noises on 435.215 ?
>>
>>
>>Sounds like a data mode called Mobitix or similar I used to decode years
>>ago.
>>The description of sounding like a truck engine activated a brain cell.
>>(Just one!)
>>Let us know if you id. it.
>>
>> Paul.
>>
>>M0SCI
>>
>>Amsat UK member 6484
>>
>>
>>----- Original Message -----
>>From: "Dave G1OCN" <dave@g1ocn.com>
>>To: <david.barber@dbelectronics.co.uk>
>>Cc: <amsat-bb@amsat.org>
>>Sent: Friday, December 30, 2005 11:44 AM
>>Subject: Re: [amsat-bb] Noises on 435.215 ?
>>
>>
>>> Hi Dave,
>>>
>>> I have listened to the recording, not a good one, but the tones
>>> run for 30/32 seconds and stop for 1 to 2 seconds.
>>> Definitely moving, with Doppler.
>>> It's my guess that it would be best decoded in an SSB mode.
>>> Difficult to describe the noise, but its repetitive,  like the tick
>>> over of a lorry engine.
>>>
>>> Don't think my DSP2232 will decode this one. Hi.
>>>
>>> I will have another listen during the course of the day.
>>>
>>> Cheers,
>>>
>>> Dave.
>>> ----
>>> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
>>> Not an AMSAT member? Join now to support the amateur satellite program!
>>> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>>----
>>Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
>>Not an AMSAT member? Join now to support the amateur satellite program!
>>To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>>----
>>Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
>>Not an AMSAT member? Join now to support the amateur satellite program!
>>To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org 
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home