| |
CX2SA > SATDIG 08.02.13 21:10l 401 Lines 12321 Bytes #999 (0) @ WW
BID : AMSATBB842
Read: GUEST
Subj: AMSAT-BB-digest V8 42
Path: IZ3LSV<IK2XDE<ON4HU<F3KT<CX2SA
Sent: 130208/2004Z @:CX2SA.SAL.URY.SA #:3218 [Salto] FBB7.00e $:AMSATBB842
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Close encounters of the Asteroidal Kind (Greg Dolkas)
2. Re: Getting back into Satellites (Dave W?DHB)
3. G3YJO Video - The World?s First Smartphone In Space (Trevor .)
4. protocol for using sats (Bill Booth)
5. 1703 pass of SO50 2/8 (ryan woods)
6. Re: protocol for using sats (Trevor .)
7. Re: protocol for using sats (PE1RDW)
8. Re: protocol for using sats (Dave W?DHB)
9. Re: protocol for using sats (Dave Webb KB1PVH)
10. Re: protocol for using sats (Anthony Monteiro)
----------------------------------------------------------------------
Message: 1
Date: Fri, 8 Feb 2013 07:26:10 -0800
From: Greg Dolkas <ko6th.greg@xxxxx.xxx>
To: Robert Bruninga <bruninga@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Close encounters of the Asteroidal Kind
Message-ID:
<CAHrzzAo9_MgsQ1gB-Y0fJZgDcw2F5OJ+NzPH4T3b_H+bqNqw4g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Is the 435KW an EIRP number, or power into their feed. I was thinking the
later. No?
Greg. KO6TH
On Feb 8, 2013 6:53 AM, "Robert Bruninga" <bruninga@xxxx.xxx> wrote:
>
> > I wonder what 435kw at 28,000 km will do to the surface temperature on
> that rock?
>
> Let's see, power goes down as 1/R squared. So lets compare it to a
> candle. A candle is about 50 Watts or about (435000/50W) or about 10,000
> times less power. Take the square root of that to get about 100/th the
> range.
>
> So that radar at 28,000 km will heat the surface about as much as a candle
> would at 280km. (unless I screwed up before my morning coffee)...
>
> Bob,WB4APR
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Fri, 8 Feb 2013 09:05:22 -0700
From: Dave W?DHB <dave@xxxxx.xxx>
To: <jeffrey.embry@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Getting back into Satellites
Message-ID: <004201ce0616$19cdd4d0$4d697e70$@xxx>
Content-Type: text/plain; charset="iso-8859-1"
Jeff
On the receive end of things, check out one of the SDR dongles like the
Funcube dongle, they are inexpensive and have the added benefit of providing
a panadapter which allows you to view the entire bandpass of a transponder
satellite. A receive preamp will probably be required.
A laptop computer will comfortably support the Dongle and SATPC32 or other
SAT software.
Dave W0DHB
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Jeffrey Embry
Sent: Thursday, February 07, 2013 8:27 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Getting back into Satellites
Good Day all,
After a few years hiatis, I am contemplating getting back on the birds.
Because I currently live in an apartment, I plan on starting the easy route
using an arrow antenna. My question is, since I sold my last HT about a
decade ago, what is recommended for the current models of HTs that have
full-duplex capabilities?
73es,
--
Jeff Embry, K3OQ
FM19nb
ARCI #11643, FPQRP #-696,
QRP-L # 67, NAQCC #25, ARS #1733
AMSAT LM-2263
--
Success is the ability to go from one failure to another with no loss of
enthusiasm. - Sir Winston Churchill
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Fri, 8 Feb 2013 17:04:58 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G3YJO Video - The World?s First Smartphone In
Space
Message-ID:
<1360343098.85573.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
In this video Professor Sir Martin Sweeting G3YJO talks about STRaND-1 which
is aiming to be the world's first smartphone satellite in space.
See http://www.uk.amsat.org/?p=12600
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
Join or Renew your AMSAT-UK membership at
http://shop.amsat.org.uk/shop/category_7/Membership-of-AMSAT-UK.html
----
------------------------------
Message: 4
Date: Fri, 08 Feb 2013 12:11:07 -0500
From: Bill Booth <ve3nxk@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] protocol for using sats
Message-ID: <511531AB.3000605@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Its been a while and I need to be refreshed. When using the sats linear
transponders how does the transmit receive work.
Does the transmit stay on frequency and tune the receiver for best receive, or
does the receiver stay and transmit frequency changes for best receive. Or do
both move if your rig supports a satellite mode.
Also I am hearing what I believe is both USB and LSB on the birds. Is one
sideband considered to be standard.
--
Bill Booth VE3NXK
Sundridge ON, Canada
79.23.37 W x 45.46.18 N
FN05ns
Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
Organ and Tissue Donation - The Gift of Life
Talk to your family. Your decision can make a difference.
------------------------------
Message: 5
Date: Fri, 8 Feb 2013 09:21:23 -0800 (PST)
From: ryan woods <kd8atf@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] 1703 pass of SO50 2/8
Message-ID:
<1360344083.76290.androidMobile@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Right after I got done my qso with k8yse I heard some other people calling
me but I was getting LOS and I could not make out the call(s) and if anyone
wants/needs fm09 or wv let me know we can give it a try. I will try to be on
the next pass.
73
Ryan
KD8ATF
Sent from my Nexus 7 tablet!
------------------------------
Message: 6
Date: Fri, 8 Feb 2013 17:47:30 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxxx Bill Booth <ve3nxk@xxxxx.xxx>
Subject: [amsat-bb] Re: protocol for using sats
Message-ID:
<1360345650.205.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
--- On Fri, 8/2/13, Bill Booth <ve3nxk@xxxxx.xxx> wrote:
> Its been a while and I need to be refreshed.? When using the sats
> linear transponders how does the transmit receive work.
>
> Does the transmit stay on frequency and tune the receiver
> for best receive, or does the receiver stay and transmit
> frequency changes for best receive.? Or do both move if
> your rig supports a satellite mode.
There was a article on that some years ago but I'm lost the URL, anyone know
it ?
The conclusion was keep the receiver frequency steady and tune the
transmitter.
> Also I am hearing what I believe is both USB and LSB on the
> birds.? Is one sideband considered to be standard.
USB is the standard for the Downlink.
The sideband used for the uplink depends on whether it's an Inverting
transponder or not. AO-7 Mode A would be USB uplink but AO-7 Mode B would be
LSB uplink.
73 Trevor M5AKA
------------------------------
Message: 7
Date: Fri, 08 Feb 2013 18:53:28 +0100
From: PE1RDW <sats@xxxxxx.xxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: protocol for using sats
Message-ID: <op.wr67zend3qy0k1@xxxxxxxxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-15; format=flowed;
delsp=yes
On Fri, 08 Feb 2013 18:11:07 +0100, Bill Booth <ve3nxk@xxxxx.xxx> wrote:
> Its been a while and I need to be refreshed. When using the sats linear
> transponders how does the transmit receive work.
>
> Does the transmit stay on frequency and tune the receiver for best
> receive, or does the receiver stay and transmit frequency changes for
> best receive. Or do both move if your rig supports a satellite mode.
>
> Also I am hearing what I believe is both USB and LSB on the birds. Is
> one sideband considered to be standard.
>
>
I think the standard is to tune the high band when tuning by hand and
prefered is to tune by computer so you stay in the same spot in the
passband, not sure what is standard but I think it was usb up and lsb down
prefert
--
73 Andre PE1RDW
------------------------------
Message: 8
Date: Fri, 8 Feb 2013 11:12:09 -0700
From: Dave W?DHB <dave@xxxxx.xxx>
To: "'Bill Booth'" <ve3nxk@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: protocol for using sats
Message-ID: <000901ce0627$cfa52180$6eef6480$@xxx>
Content-Type: text/plain; charset="iso-8859-1"
Bill
I tune both using SATPC32 or HRD SATtracker.
You may not need a satellite mode if you use software.
I've been running across many more folks that tune both these days.
It definitely makes for a less chaotic passband without folks drifting
through the passband.
Rule of thumb is that downlink is USB
Uplink is LSB for inverting transponders AO7b,FO-29,VO-52
USB for non-inverting AO7a
Dave W0DHB
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Bill Booth
Sent: Friday, February 08, 2013 10:11 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] protocol for using sats
Its been a while and I need to be refreshed. When using the sats linear
transponders how does the transmit receive work.
Does the transmit stay on frequency and tune the receiver for best receive,
or does the receiver stay and transmit frequency changes for best receive.
Or do both move if your rig supports a satellite mode.
Also I am hearing what I believe is both USB and LSB on the birds. Is one
sideband considered to be standard.
--
Bill Booth VE3NXK
Sundridge ON, Canada
79.23.37 W x 45.46.18 N
FN05ns
Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
Organ and Tissue Donation - The Gift of Life
Talk to your family. Your decision can make a difference.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Fri, 8 Feb 2013 13:12:48 -0500
From: Dave Webb KB1PVH <kb1pvh@xxxxx.xxx>
To: Bill Booth <ve3nxk@xxxxx.xxx>
Cc: AMSAT -BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: protocol for using sats
Message-ID:
<CAEMY9Fc9m18L=RGsLLi9ZDdOj3BG1CXb2=-nv1-PDiAX=RO0qg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Bill,
Full computer doppler control is preferred, but if it isn't possible, tune
the higher of the two frequencies. Check out this link for the "One true
rule"
http://www.amsat.org/amsat/features/one_true_rule.html
Dave-KB1PVH
Sent from my Verizon Wireless Droid RAZR
------------------------------
Message: 10
Date: Fri, 08 Feb 2013 13:20:47 -0500
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
To: Bill Booth <ve3nxk@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: protocol for using sats
Message-ID: <511541FF.2000209@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Bill,
Take a look at this, still the best info:
http://www.amsat.org/amsat/features/one_true_rule.html
You always receive USB but may need to Tx LSB
if the transponder is inverting.
73,
Tony AA2TX
----
On 2/8/2013 12:11 PM, Bill Booth wrote:
> Its been a while and I need to be refreshed. When using the sats linear
> transponders how does the transmit receive work.
>
> Does the transmit stay on frequency and tune the receiver for best
> receive, or does the receiver stay and transmit frequency changes for
> best receive. Or do both move if your rig supports a satellite mode.
>
> Also I am hearing what I believe is both USB and LSB on the birds. Is
> one sideband considered to be standard.
>
>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 8, Issue 42
***************************************
Read previous mail | Read next mail
| |
