| |
CX2SA > SATDIG 05.03.20 18:45l 760 Lines 25718 Bytes #999 (0) @ WW
BID : AMSATBB1568
Read: GUEST
Subj: AMSAT-BB-digest V15 68
Path: IW8PGT<IU4DTL<HB9CSR<IK6IHL<IZ3LSV<DB0ERF<DB0RES<ON0AR<OZ5BBS<CX2SA
Sent: 200305/1635Z @:CX2SA.SAL.URY.SOAM #:26250 [Salto] FBB7.00e $:AMSATBB1568
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: VJB Cheap Yagis (Scott)
2. XW-2D Returns to Life! (Hasan al-Basri)
3. Re: XW-2D Returns to Life! (Robert Bruninga)
4. Re: XW-2D Returns to Life! (Paul Stoetzer)
5. Re: XW-2D Returns to Life! (Hasan al-Basri)
6. Re: XW-2D Returns to Life! (Hasan al-Basri)
7. Fwd: [Nouvel article] Rencontre Spatial Radioamateur 7 & 8
mars 2020 ? Dernier jour pour vous inscrire ! (christophe.mcr)
8. Wide or Narrow? (Steve Kristoff)
9. Re: Wide or Narrow? (Scott)
10. Re: Wide or Narrow? (Scott)
11. Re: XW-2D Returns to Life! (Zach Metzinger)
12. APRSdroid (Steve Kristoff)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Mar 2020 07:01:56 -0800
From: Scott <ka7fvv@?????.???>
To: JamesDuffey <jamesduffey@???????.???>
Cc: AMSAT-BB@?????.???
Subject: Re: [amsat-bb] VJB Cheap Yagis
Message-ID: <B3E0AEB7-D127-46C9-9C1B-1C41607989F0@?????.???>
Content-Type: text/plain; charset=utf-8
These designs work great. I built the 1.2 ghz version off of these plans
and mounted it on my tripod with my Arrow antenna. Scott, KA7FVV
73. Scott, KA7FVV
Director - KBARA kbara.org
Co-Owner WA7DRE 443.525 System Fusion Repeater
Co-Owner KA7FVV 147.320 KBARA Repeater
www.ka7fvv.net
> On Mar 4, 2020, at 06:01, JamesDuffey via AMSAT-BB <amsat-bb@?????.???>
wrote:
>
> ?Kent has done the work for you
>
> < https://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf >
>
> The elements should be coplanar, for several reasons, but that is a
secondary consideration for the FM birds at least. - Duffey
>
>
> James Duffey KK6MC
> Cedar Crest NM
>
>> On Mar 4, 2020, at 06:54, Joe via AMSAT-BB <amsat-bb@?????.???> wrote:
>>
>> ?The awesome little "Cheap Yagis"
>>
>> https://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf
>>
>> Has anyone modified the 144 Mhz one up higher in the band for Sat work,
>>
>> AND
>>
>> has anyone taken the VHF and the UHF versions and put them on a single
hand held boom?
>>
>> Elements in line or at right angles?
>>
>> Joe WB9SBD
>>
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. 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!
>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Wed, 4 Mar 2020 15:41:38 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] XW-2D Returns to Life!
Message-ID:
<CAM4UQf1ZG0wnFWgYKwRuKE-X_ER7AgBDTyCUEkmkPo2iEXvAvw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
K7VNE reported to me this morning that he had been on XW-2D (long since
non-operational) and sigs were very good, but no one else was on.
Signals were of good quality, no FM'ing of my SSB signal.
I just checked it and had a pass of Max EL 2 deg to my East. It is there,
it is loud. *The CW beacon is raspy*.
The passband was normal level and my signal was typical:
Max Sig: -64 dBm
Noise Floor: -81 dBM
I made an mp4 recording of the pass, with me calling CQ and announcing
Elevation and signal levels.
https://drive.google.com/open?id=1lKYvARp4SyHUraAX9u6HQRbmnCiamJAM
Download this mp4 file and play it back on any device (even a phone) and
you will see and hear what I did.
I have seen no announcement about not using the satellite, but will watch
for same.
73, N0AN
Hasan
------------------------------
Message: 3
Date: Wed, 4 Mar 2020 22:11:37 -0500
From: Robert Bruninga <bruninga@????.???>
To: Hasan al-Basri <hbasri.schiers6@?????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] XW-2D Returns to Life!
Message-ID:
<CALdCfNKtPL8znrg+MGJMnfabYSTikQ7v6BBzQAA=2-1mk5cVXg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hasan,
In your SDR waterfall there is clearly an AM signal up the band with
carrier and equal sidebands. Did you ever go listen to see what that
was?Just curious.
Bob, WB4APR
On Wed, Mar 4, 2020 at 4:41 PM Hasan al-Basri via AMSAT-BB <
amsat-bb@?????.???> wrote:
> K7VNE reported to me this morning that he had been on XW-2D (long since
> non-operational) and sigs were very good, but no one else was on.
>
> Signals were of good quality, no FM'ing of my SSB signal.
>
> I just checked it and had a pass of Max EL 2 deg to my East. It is there,
> it is loud. *The CW beacon is raspy*.
>
> The passband was normal level and my signal was typical:
>
> Max Sig: -64 dBm
> Noise Floor: -81 dBM
>
> I made an mp4 recording of the pass, with me calling CQ and announcing
> Elevation and signal levels.
>
> https://drive.google.com/open?id=1lKYvARp4SyHUraAX9u6HQRbmnCiamJAM
>
> Download this mp4 file and play it back on any device (even a phone) and
> you will see and hear what I did.
>
> I have seen no announcement about not using the satellite, but will watch
> for same.
> 73, N0AN
> Hasan
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Wed, 4 Mar 2020 22:36:03 -0500
From: Paul Stoetzer <n8hm@????.???>
To: Robert Bruninga <bruninga@????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] XW-2D Returns to Life!
Message-ID:
<CABzOSOop+=sCPvLWsn_Q95rDOFOT-bOf5HsjSrCKS8vp=u+CXw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Bob,
I bet CAS-4B was also above the horizon at the time as that appears to be
the 4k8 GMSK telemetry on 145.890 MHz.
73,
Paul, N8HM
On Wed, Mar 4, 2020 at 22:13 Robert Bruninga via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Hasan,
> In your SDR waterfall there is clearly an AM signal up the band with
> carrier and equal sidebands. Did you ever go listen to see what that
> was?Just curious.
> Bob, WB4APR
>
> On Wed, Mar 4, 2020 at 4:41 PM Hasan al-Basri via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
> > K7VNE reported to me this morning that he had been on XW-2D (long since
> > non-operational) and sigs were very good, but no one else was on.
> >
> > Signals were of good quality, no FM'ing of my SSB signal.
> >
> > I just checked it and had a pass of Max EL 2 deg to my East. It is there,
> > it is loud. *The CW beacon is raspy*.
> >
> > The passband was normal level and my signal was typical:
> >
> > Max Sig: -64 dBm
> > Noise Floor: -81 dBM
> >
> > I made an mp4 recording of the pass, with me calling CQ and announcing
> > Elevation and signal levels.
> >
> > https://drive.google.com/open?id=1lKYvARp4SyHUraAX9u6HQRbmnCiamJAM
> >
> > Download this mp4 file and play it back on any device (even a phone) and
> > you will see and hear what I did.
> >
> > I have seen no announcement about not using the satellite, but will watch
> > for same.
> > 73, N0AN
> > Hasan
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. 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!
> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> >
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Wed, 4 Mar 2020 21:41:19 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: Paul Stoetzer <n8hm@????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] XW-2D Returns to Life!
Message-ID:
<CAM4UQf0AtT2NUFndHi=c5m4KFA_VZVtO7TbD8QQuUT8+f1E7hA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Correct, that is what we call the Batwing telemetry beacon for one of the
cases birds.
73, N0AN
Hasan
On Wed, Mar 4, 2020, 9:36 PM Paul Stoetzer <n8hm@????.???> wrote:
> Bob,
>
> I bet CAS-4B was also above the horizon at the time as that appears to be
> the 4k8 GMSK telemetry on 145.890 MHz.
>
> 73,
>
> Paul, N8HM
>
> On Wed, Mar 4, 2020 at 22:13 Robert Bruninga via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>> Hasan,
>> In your SDR waterfall there is clearly an AM signal up the band with
>> carrier and equal sidebands. Did you ever go listen to see what that
>> was?Just curious.
>> Bob, WB4APR
>>
>> On Wed, Mar 4, 2020 at 4:41 PM Hasan al-Basri via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>>
>> > K7VNE reported to me this morning that he had been on XW-2D (long since
>> > non-operational) and sigs were very good, but no one else was on.
>> >
>> > Signals were of good quality, no FM'ing of my SSB signal.
>> >
>> > I just checked it and had a pass of Max EL 2 deg to my East. It is
>> there,
>> > it is loud. *The CW beacon is raspy*.
>> >
>> > The passband was normal level and my signal was typical:
>> >
>> > Max Sig: -64 dBm
>> > Noise Floor: -81 dBM
>> >
>> > I made an mp4 recording of the pass, with me calling CQ and announcing
>> > Elevation and signal levels.
>> >
>> > https://drive.google.com/open?id=1lKYvARp4SyHUraAX9u6HQRbmnCiamJAM
>> >
>> > Download this mp4 file and play it back on any device (even a phone) and
>> > you will see and hear what I did.
>> >
>> > I have seen no announcement about not using the satellite, but will
>> watch
>> > for same.
>> > 73, N0AN
>> > Hasan
>> > _______________________________________________
>> > Sent via AMSAT-BB@?????.???. 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!
>> > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>> >
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. 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!
>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
------------------------------
Message: 6
Date: Thu, 5 Mar 2020 04:06:55 -0600
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: George Sakai <grsakai5120@?????.???>, AMSAT-BB
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] XW-2D Returns to Life!
Message-ID:
<CAM4UQf2EHeoDm7EwLER4XagGPR9wbyOCCifFM4Lws1Fztwy_Yw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi George,
(and anyone else who is interested in an easy way to evaluate your
satellite rx performance)
These remarks are with respective to linear birds, not FM
Some of the satellite ops I work with run various SDRs (software defined
radios like the FunCube Pro+). The software we use with them is called SDR
Console v3
(Google SDR Radio or look at this group:
main@?????????.??????.???
What we do so we can compare apples to apples is the following:
The software is designed to be able to measure relative signal levels at
high accuracy (-dBM)
1. Connect a 50 ohm resistor to the antenna or preamp input.
2. Set the rx for maximum sensitivity (RF Gain)
3. Adjust IF Gain so that the 50 Ohm resistor produces a signal level of
-95 dBM
4. This creates a common noise floor level calibration point so that we can
compare local noise (environmental) as well as satellite signal levels.
5. Now disconnect 50 ohm resistor and change to "real" satellite antenna.
Observe the increase in noise floor. If there isn't one, you have poor rx
sensitivity. If there is an increase and it is 6 dB or more, you have local
noise problems (environmental). If there is a small increase in noise, you
likely have relatively low noise, and at least it exceeds the internally
generated noise of your radio/preamp combo.
Now, when we observe signals from the satellites, we can directly compare
peak signal strength in dBm between our satellite setups. This includes,
antenna polarity, antenna gain, feedline losses, differences in uplink
power, differences in receiver noise figure, and locally generated noise
like power line, WiFi hash, etc. All...easily and accurately done by
having software that works correctly and a simple SDR Dongle using Simon's
(G3ELI) software (which is free).
For example:
If KB7IJ has a noise floor of -76 and I have a noise floor of -90 (dBm),
and he has a peak BEACON signal strength of -53 and I have a peak strength
of --60, we can see two things; (these are real and typical measurements,
btw)
1. His ambient noise is 14 dB higher than mine. He lives south of Dallas,
Tx, and has to shoot thru the city to see sats. Lots of environmental
noise! I live in rural Iowa. Much quieter.
2. His rx system has 7 dB greater gain than mine (antennas). That makes
sense as he has 2x7 EL yagis and I have a single 5 EL Yagi. So all else
being equal (and it almost never is), he should always see the birds 7 dB
louder than I do (actual signal level, not SNR)
Now look at SNR (Signal to Noise Ratio):...a much different story. How well
do we hear the birds?
His SNR (best): -76 dBm noise floor - (-53) signal = 23 dB SNR (signal is
23 above noise, loud!)
My SNR (best ): -90 dBm noise floor - (-60) signal = 30 dB SNR
So when we are both getting a satellite at our best signal level, I am
hearing the bird 7 dB better than he is, even though his rx antennas are
much better.
Look what happens when the ssb signal is much weaker:
If I am seeing the SSB signal at an SNR of 10 dB (the lowest signal
strength that an SSB signal can be understood at):
He is seeing it at only 3 dB SNR which is unreadable.
In general, I nearly always hear both him and myself way better than he
does, because my noise floor is so much better than his.
Keep in mind, these are all RELATIVE measurements not ABSOLUTE. They are
not meant to be lab grade, they are meant to be able to understand and
measure reasonably well, how a satellite station is performing in the real
world. Common calibration between stations allows us to compare how our
systems are working. It's not perfect, but it is useful. (There are other
factors, like the practical limit of SNR from any bird based on passband
noise). If you can consistently see/hear passband noise, you are good. If
you only hear it now and then, your rx system needs work)
p.s. The software from Simon, also allows us to make MP4 recording (video
and audio) of our satellite qsos, which can demonstrate some of the very
dramatic ways to improve or ruin your ability to use satellites
efficiently. That is to say, receive properly and not overdrive the
satellite with excessive uplink power, because you can't hear worth a darn
and don't know it. (Just continue to increase transmit power so you can
hear yourself, taking more than your share of what is available, because it
is a shared resource).
I have hours or recordings of assorted stations doing exactly this (running
excessive uplink power and thus producing downlink signals 6 dB or more
louder than the CW beacon) and therefore stealing the available downlink
power of others, driving them down into the noise floor. It's embarrassing.
*The rule is simple: you should NEVER be louder than the CW beacon, period.*
73, N0AN
Hasan
On Wed, Mar 4, 2020 at 7:48 PM George Sakai <grsakai5120@?????.???> wrote:
> Thanks for the info Hasan. What do you use to measure signal levels in
> dBm?
>
> George N3GS
>
> On Wednesday, March 4, 2020, 03:43:43 PM CST, Hasan al-Basri via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>
> K7VNE reported to me this morning that he had been on XW-2D (long since
> non-operational) and sigs were very good, but no one else was on.
>
> Signals were of good quality, no FM'ing of my SSB signal.
>
> I just checked it and had a pass of Max EL 2 deg to my East. It is there,
> it is loud. *The CW beacon is raspy*.
>
> The passband was normal level and my signal was typical:
>
> Max Sig: -64 dBm
> Noise Floor: -81 dBM
>
> I made an mp4 recording of the pass, with me calling CQ and announcing
> Elevation and signal levels.
>
> https://drive.google.com/open?id=1lKYvARp4SyHUraAX9u6HQRbmnCiamJAM
>
> Download this mp4 file and play it back on any device (even a phone) and
> you will see and hear what I did.
>
> I have seen no announcement about not using the satellite, but will watch
> for same.
> 73, N0AN
> Hasan
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 7
Date: Thu, 5 Mar 2020 12:05:14 +0100
From: "christophe.mcr" <christophe.mcr@?????.???>
To: amsat-f@???????????.???? amsat-bb@?????.???? hyperfr@???????.??
Subject: [amsat-bb] Fwd: [Nouvel article] Rencontre Spatial
Radioamateur 7 & 8 mars 2020 ? Dernier jour pour vous inscrire !
Message-ID:
<CADF-Vj1nLZ9zfRb_eUYQq3ZS6ho4tEt6c3B_awSBuTFF5eftbg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Nouvel article sur *AMSAT Francophone*
<http://site.amsat-f.org/?author=2> Rencontre Spatial Radioamateur 7 & 8
mars 2020 ? Dernier jour pour vous inscrire !
<http://site.amsat-f.org/2020/03/04/rencontre-spatial-radioamateur-7-8-mars-20
20-dernier-jour-pour-vous-inscrire/>
par
Xtophe <http://site.amsat-f.org/?author=2>
<http://site.amsat-f.org/wp-content/uploads/2020/02/RSRtitre.jpg>
La cloture des inscriptions aux journ?es sera faite le *5 mars 2020 ? 14h*.
Elle nous permettra de mettre en place la logistique n?cessaire notamment
pour les Il ne reste que quelques places disponibles. La capacit? du lieu
ou se situe l'?v?nement est limit?e.
*Pour r?server vos places, utilisez le lien ci dessous : *
https://www.billetweb.fr/troisieme-rencontre-spatial-radioamateur
*Xtophe <http://site.amsat-f.org/?author=2>* | 4 mars 2020 ? 10 h 33 min | U
------------------------------
Message: 8
Date: Thu, 05 Mar 2020 10:30:58 -0500
From: "Steve Kristoff" <skristof@???????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Wide or Narrow?
Message-ID: <b6ab82b139bbba5f85f6f5527f72f6ad@???????.???>
Content-Type: text/plain; charset=UTF-8
When aiming at the APRS satellites (ISS, AISat, any others?) should I use
Wide or Narrow FM? I vaguely recall reading that narrow is good, but I can't
find the reference.?
Your assistance is appreciated!
Steve AI9IN
?
------------------------------
Message: 9
Date: Thu, 5 Mar 2020 10:47:21 -0500
From: Scott <scott23192@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Wide or Narrow?
Message-ID:
<CAJCSnOaapZRmEGzMEeH49WGQT7wxAL7BS9iKkncZ3rPK_yjYtA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hey Steve!
I've found that AISAT-1 works better with FM-Narrow. It's my understanding
that the other APRS sats have always worked fine with regular FM... that's
what I use for all but AISAT-1.
Unfortunately, for quite a while now the only active 2m APRS satellite has
been AISAT-1. However, it has not been heard since 3-Mar. Certainly hope
that's temporary!
Of course we all look forward to the day that the ISS digipeater is back
online, too.
-Scott, K4KDR
========================
On Thu, Mar 5, 2020 at 10:34 AM Steve Kristoff via AMSAT-BB <
amsat-bb@?????.???> wrote:
>
> When aiming at the APRS satellites (ISS, AISat, any others?) should I use
> Wide or Narrow FM? I vaguely recall reading that narrow is good, but I
> can't find the reference.
> Your assistance is appreciated!
> Steve AI9IN
>
------------------------------
Message: 10
Date: Thu, 5 Mar 2020 11:07:17 -0500
From: Scott <scott23192@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Wide or Narrow?
Message-ID:
<CAJCSnOa0veUcbTcAC7RffhAOwnT0pKFOmH1cvwmMCi2LCMmWOA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Of course I spoke too soon - thankfully AISAT-1 was working great on the
1600utc pass today (05-Mar) and saw packets from AI9IN-7, too!
--------------------------------
20200305160047 : KE4AZZ]CQ,AISAT*,qAO,K4KDR-15::K4KDR-6 :de ke4azz el87{020
20200305160044 : AISAT-1]CQ,qAO,K4KDR-15:From AMSAT INDIA & Exseed Space
|302|49|47|1118{019
20200305160042 : K4KDR-6]CQ,AISAT*,qAO,K4KDR-15::AI9IN-7 :73 from VA
Steve!{018
20200305160014 : K4KDR-6]CQ,AISAT*,qAO,K4KDR-15::AI9IN-7 :Heard you via
AISAT-1 in Montpelier, VA FM17es{017
20200305155959 : K4KDR-6]CQ,AISAT*,qAO,K4KDR-15::KE4AZZ :QSL - 73!!{016
20200305155952 :
AI9IN-7]CQ,AISAT*,qAO,K4KDR-15:=3920.41N/08512.14W-/A=000797 Hello from
AI9IN EM79{015
20200305155943 : AISAT-1]CQ,qAO,K4KDR-15:From AMSAT INDIA & Exseed Space
|242|49|48|1118{013
20200305155942 : K4KDR-6]CQ,AISAT*,qAO,K4KDR-15::KE4AZZ :Heard you via
AISAT-1 in Montpelier, VA FM17es{012
20200305155928 : KE4AZZ]CQ,AISAT*,qAO,K4KDR-15:=2702.06N/08209.93W-de
KE4AZZ el87 {UISS54}{010
20200305155921 : K4KDR-6]CQ,AISAT*,qAO,K4KDR-15:=3747.66N/07736.67W`de
K4KDR scott23192@?????.??? Virginia FM17es{009
--------------------------------
-Scott, K4KDR
=================================
On Thu, Mar 5, 2020 at 10:47 AM Scott <scott23192@?????.???> wrote:
> Hey Steve!
>
> I've found that AISAT-1 works better with FM-Narrow. It's my
> understanding that the other APRS sats have always worked fine with regular
> FM... that's what I use for all but AISAT-1.
>
> Unfortunately, for quite a while now the only active 2m APRS satellite has
> been AISAT-1. However, it has not been heard since 3-Mar. Certainly hope
> that's temporary!
>
> Of course we all look forward to the day that the ISS digipeater is back
> online, too.
>
> -Scott, K4KDR
>
> ========================
>
> On Thu, Mar 5, 2020 at 10:34 AM Steve Kristoff via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>>
>> When aiming at the APRS satellites (ISS, AISat, any others?) should I use
>> Wide or Narrow FM? I vaguely recall reading that narrow is good, but I
>> can't find the reference.
>> Your assistance is appreciated!
>> Steve AI9IN
>>
>
------------------------------
Message: 11
Date: Thu, 5 Mar 2020 10:18:41 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] XW-2D Returns to Life!
Message-ID: <f4a764fd-d741-e7b4-984e-14628709283d@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2020-03-05 04:06, Hasan al-Basri via AMSAT-BB wrote:
> Keep in mind, these are all RELATIVE measurements not ABSOLUTE.
Indeed. I suggest not using the unit dBm, as that is decibels relative
to 1 milliwatt. This is an absolute unit.
It is common to refer to some other standard when comparing relative
power, such as dbFS (decibels relative to full scale, usually a negative
number) for an ADC.
Perhaps dBANF might work, which would be dB relative to Agreed Noise
Floor. I don't think I'd use "dBNF", as that might be confused with
Noise Figure in dB.
--- Zach
N0ZGO
------------------------------
Message: 12
Date: Thu, 05 Mar 2020 11:26:37 -0500
From: "Steve Kristoff" <skristof@???????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] APRSdroid
Message-ID: <c9296b99367ecceecefbb52605e53d83@???????.???>
Content-Type: text/plain; charset=UTF-8
Those of you who said that APRSdroid works were right. I'm not the sharpest
knife in the drawer, but I got it working without much fuss. I just
confirmed on AISAT-1 that it works on my phone hooked up to my HT. So, I
agree, don't believe all the bad reviews you see on the app Play Store.
Steve AI9IN
?
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
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 member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 68
****************************************
Read previous mail | Read next mail
| |
