[amsat-bb] BY70-1 Observation & Question

Mike Diehl diehl.mike.a at gmail.com
Tue Jan 3 17:15:53 UTC 2017


Greg,

Thanks for the QSO. I was able to hear you down to my visible LOS, San Gabriel mountains do a good job of blocking the birds to the north.

As far as keps go if you're using the Celestrak New Launches then you have the most current. Even with that it seems like people are sometimes off enough to struggle getting in. This seems to be where hand guided has the upper hand, pun intended. Unfortunately, it seems like this isn't going to change considering the short expected life. 

QRO probably helps a few because they're catching the bird with a less than optimal part of their antenna radiation pattern. RX quality can lead you to think you're in the right direction but I think I could receive this bird with a BNC stuck in a potato. I actually heard WD9EWK the other day near LOS with Elk laying on top of my truck. 

Personally, my biggest struggle is the delayed audio. I catch myself speaking slowly and noticed other operators doing the same thing. When I listen to my recordings I almost sound like I had one too many cold ones before the pass hi hi. 

Scott probably hit the nail on the head as to why activity has been a little slim. I haven't been on as many passes because we have been getting some rain for a change. 

73's

Mike Diehl
AI6GS 

> On Jan 2, 2017, at 11:45 PM, Greg D <ko6th.greg at gmail.com> wrote:
> 
> Hi Mike,
> 
> Good to work you on the last 06:00z pass.  Also heard KK6OTJ, but never
> made 2x contact.
> 
> For a change, the bird seemed alive and well from the beginning of the
> pass until nearly the end (vs before when I couldn't work it until after
> TCA).  In fact, it seems like it was too active too soon, suggesting my
> keps are late.  I'm using the keps from object 41909, updated from
> Celestrak right before the pass.  Is that the best set?
> 
> Greg  KO6TH
> 
> 
> Mike Diehl wrote:
>> Ted,
>> 
>> I worked the last pass over SoCal from my driveway with 500mW. I had little trouble getting in once it cleared the local obstructions. 
>> 
>> Hand guided Elk with VFO Doppler tuning. I think most people have outdated keps so they're way off. I've worked this bird a couple times now and never over 2.5W with 817 as an uplink. As usual, QRO isn't the answer. 
>> 
>> 73's
>> 
>> Mike Diehl
>> AI6GS 
>> 
>>> On Jan 2, 2017, at 8:42 PM, Ted <k7trkradio at charter.net> wrote:
>>> 
>>> Scott, John, K8YSE is the Gold Standard, so I'm looking forward to his reply to your question. (I'm waiting before dabbling with BY70-1, but we better be quick !)
>>> 
>>> HNY and 73, Ted
>>> K7TRK
>>> 
>>> -----Original Message-----
>>> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Scott
>>> Sent: Monday, January 2, 2017 8:13 PM
>>> To: amsat-bb at amsat.org
>>> Subject: [amsat-bb] BY70-1 Observation & Question
>>> 
>>> Happy New Year to everyone.
>>> 
>>> So for the second evening in a row, as I monitored BY70-1 for telemetry packets, I noticed performance on the FM voice transponder that prompts me to ask a question.
>>> 
>>> Specifically, I hear K8YSE getting into the satellite with a crystal clearness that you would expect from a simplex QSO with someone in your front yard.  Unfortunately, he’s been by himself for the most part... a station or two might try to get in but you just get fragments or a lot of static.
>>> 
>>> As a novice, should that make me think that this satellite requires a lot of ERP to get into cleanly?  Or maybe with the TLE’s changing so rapidly, is this sat just more difficult to track than the others?
>>> 
>>> One other variable tonight is the weather; I suppose anyone using a hand-held antenna who normally works outside might be off the air because of all the rain in parts of the country right now.  Maybe it’s just a lot of football on TV!
>>> 
>>> I know that any answer might be speculation, but when I hear something happen on the air repeatedly it makes me want to see if I can learn the cause (or possible causes).   
>>> 
>>> Thanks!
>>> 
>>> -Scott,  K4KDR
>>> Montpelier, VA
>>> twitter:  @scott23192
>>> _______________________________________________
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>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. Opinions expressed
>> are solely those of the author, and do not reflect the official views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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