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CX2SA > SATDIG 14.08.17 07:58l 935 Lines 34208 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Ham Science using PSAT PSK31 HF xponder (Robert Bruninga)
2. Upcoming ARISS Contact Schedule as of 2017-08-06 21:00 UTC
(AJ9N@xxx.xxxx
3. Re: Yaesu G-5500 az issue (Jeff Griffin)
4. (no subject) (Craig Kinsman)
5. Re: (no subject) (Gabriel Zeifman)
6. Cleaning up the Global APRS Satellite ground station network?
(Robert Bruninga)
7. YOTA ARISS Contact Tuesday 8th August (Graham Shirville)
8. Re: Cleaning up the Global APRS Satellite ground station
network? (Andrew Rich)
9. Bright flashy object (Pedro Sousa)
10. Re: Bright flashy object (Andrew Rich)
11. Cleaning up the Global APRS Satellite ground station network?
(Dave Ryan)
12. Re: Cleaning up the Global APRS Satellite ground station
network? (Scott)
----------------------------------------------------------------------
Message: 1
Date: Sun, 6 Aug 2017 12:38:49 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Cc: Bill Liles <lilesw@xxxxx.xxx>
Subject: [amsat-bb] Ham Science using PSAT PSK31 HF xponder
Message-ID:
<CALdCfNJjLwVwgPHYL8uRU3kjtSP+U01JSAHbHc-_jrMS=fxM+A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Some people have reported difficulty getting into the BrnoUniversity PSK31
HF uplink on PSAT(NO84) and we just realized that such reports could be
valuable data that we have been ignoring.!
For our next HFSAT we want to explore how often the ionosphere bends the
uplink down below the satelite and any given station is unable to get in
even though their tracking program shows them the satelite is in view. We
just realized we can get all this data simply by monitoring the PSAT
transponder and when people see AOS and LOS.
WHen we are looking for success (DX via the transponder) it is human nature
to ignore passes that didn't work. But in this case, that is the science
data that is more interesting.
But then there is also another problem with "negative reslts" is that you
have now way of knowing if the resason you got negative results was becuase
of a vist by Murphy or because in fact, the negative effect you are looking
for was the cause.
So the best data is from a relatively high pass where you domt start seeing
your downlink until the satelite gets above X degrees elevation and then
gets strong and then fades out below Y elevation on the other side.
An ideal report might be something like:
DATE, STARTTIME, AOS angle, Max angle/AZ, LOS angle, ENDTIME, SUn AZ/EL
The sun direction will be helpful in explainign difference in AOS and LOS
elevation angles.
Its just an idea if aonyone wants to dabble in some Ham Science...
Bob, WB4APR
------------------------------
Message: 2
Date: Sun, 6 Aug 2017 16:21:00 -0400
From: AJ9N@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2017-08-06
21:00 UTC
Message-ID: <296fde.53efaf33.46b8d42c@xxx.xxx>
Content-Type: text/plain; charset="ISO-8859-1"
Upcoming ARISS Contact Schedule as of 2017-08-06 21:00 UTC
Quick list of scheduled contacts and events:
Frontiers of Flight Museum/ Moon Day, Dallas, TX, telebridge via ON4ISS
The ISS callsign is presently scheduled to be TBD
The scheduled astronaut is Paolo Nespoli IZ?JPA
Contact was successful: Sat 2017-08-05 18:02:31 UTC 87 deg (***)
****************************************************************************
**
ARISS is always glad to receive listener reports for the above contacts.
ARISS thanks everyone in advance for their assistance. Feel free to send
your reports to aj9n@xxxxx.xxx or aj9n@xxx.xxx.
Listen for the ISS on the downlink of 145.8? MHz.
****************************************************************************
***
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
****************************************************************************
***
Several of you have sent me emails asking about the RAC ARISS website and
not being able to get in. That has now been changed to
http://www.ariss.org/
Note that there are links to other ARISS websites from this site.
****************************************************************************
Looking for something new to do? How about receiving DATV from the ISS?
If interested, then please go to the ARISS-EU website for complete
details. Look for the buttons indicating Ham Video.
http://www.ariss-eu.org/
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to
provide some insight. Contact Kerry at kbanke@xxxxxxxxx.xxx
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:
Satoshi 7M3TJZ with 123
Gaston ON4WF with 123
Francesco IK?WGF with 119
****************************************************************************
The webpages listed below were all reviewed for accuracy. Out of date
webpages were removed and new ones have been added. If there are
additional
ARISS websites I need to know about, please let me know.
Note, all times are approximate. It is recommended that you do your own
orbital prediction or start listening about 10 minutes before the listed
time.
All dates and times listed follow International Standard ISO 8601 date and
time format YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of 2017-08-06 21:00 UTC.
(***)
Here you will find a listing of all scheduled school contacts, and
questions, other ISS related websites, IRLP and Echolink websites, and
instructions for any contact that may be streamed live.
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
http://www.amsat.org/amsat/ariss/news/arissnews.txt
Total number of ARISS ISS to earth school events is 1151. (***)
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1110. (***)
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 47.
A complete year by year breakdown of the contacts may be found in the
file.
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
Please feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following US states and entities have never had an ARISS contact:
Arkansas, Delaware, South Dakota, Wyoming, American Samoa, Guam, Northern
Marianas Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL information may be found at:
http://www.ariss.org/qsl-cards.html
ISS callsigns: DP?ISS, IR?ISS, NA1SS, OR4ISS, RS?ISS
****************************************************************************
The successful school list has been updated as of 2017-08-06 21:00 UTC.
(***)
http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction
.rtf
Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC.
http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf
Check out the Zoho reports of the ARISS contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 50 on orbit
Peggy Whitson
Exp. 51 on orbit
Jack Fischer K2FSH
Fyodor Yurchikhin RN3FI
****************************************************************************
73,
Charlie Sufana AJ9N
One of the ARISS operation team mentors
------------------------------
Message: 3
Date: Sun, 6 Aug 2017 18:53:31 -0400
From: "Jeff Griffin" <kb2m@xxxx.xxx>
Cc: "'AMSAT-BB'" <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] Yaesu G-5500 az issue
Message-ID: <034a01d30f06$d4260c00$7c722400$@xxx>
Content-Type: text/plain; charset="UTF-8"
I am once again upset with Yaesu. After removing sat antennas from my tower,
removing the rotor, completely disassembling the azimuth rotor and guess
what I find? A loose set screw. After taking everything apart I discover
Yaesu used a set screw to fix the primary pinion gear to the motor. I mean,
how stupid is that. I was really pissed, if I was the engineer in charge of
the design of the drive system I would of spec'd a drift pin. A set screw
really. So I cleaned everything off, applied some blue Locktite, noe all is
once again good in KB2M land....
This is my third G-5500 bought in 2009, the first one was bought used, and
when I replaced it when over 20 years old, second one is in Florida,
acquired used age unknown. I'm thinking when assembled, someone forgot to
Locktite the set screw on this one. Geezzz...
To all my sat buddies, I will be back OTH tomorrow afternoon....
73 Jeff kb2m
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Jeff Griffin
Sent: Friday, August 4, 2017 4:07 PM
To: 'Dave Webb KB1PVH'
Cc: 'AMSAT-BB'
Subject: Re: [amsat-bb] Yaesu G-5500 az issue
Hi Dave, I saw that. My problem I hearing from a private reply is in the
clutch. I also discovered from a direct reply back to me there is an
exploded view in the G-5400 manual. See?..
http://www.foxdelta.com/products/ST2-0816/G5400-G5600.pdf
Good ol FoxDelta saved the day!
I?m going to get back on it tomorrow morning and see if my G-5500 is close
enough to the diagram to take apart. I?ll report back here to the group with
my findings?.
73 Jeff kb2m
From: Dave Webb KB1PVH [mailto:kb1pvh@xxxxx.xxxx
Sent: Friday, August 4, 2017 2:59 PM
To: kb2m
Cc: AMSAT-BB
Subject: Re: [amsat-bb] Yaesu G-5500 az issue
Jeff,
Not sure if this will be any help to you or not.
http://kb5wia.blogspot.com/2012/03/yaesu-g5500-rotator-motor-repair.html?m=1
Dave-KB1PVH
Sent from my Galaxy S7
On Aug 4, 2017 2:55 PM, "Jeff Griffin" <kb2m@xxxx.xxx> wrote:
I removed the rotor from the tower today and started working on the azimuth
rotor. When power is applied via left or right control the motor is running.
I carefully split the case and everything appears intact. Grease is still
good, no missing gear teeth, no metal shavings in bottom of housing. So the
problem is somewhere in the gearing, or mechanical control. I would like to
proceed further but have no exploded view of the inside of the rotor. I
wouldn't want to proceed without some kind of service manual part
description view. Does anyone have anything that might help? Does anyone
have a clue, maybe had this same problem and fixed it?I already have the
useless Yaesu user manual..
73 Jeff kb2m
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Sun, 6 Aug 2017 22:12:41 +0200
From: "Craig Kinsman" <craig@xxxxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] (no subject)
Message-ID: <F02D63ADCC504BC68985CB92CFA1A0E5@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Dear Sir
I have been trying to set up a new account at issfanclub.com and I am asked
what is the packet radio callsign.
Please help me with this as I dont know it.
Craig
ZS6XKH
------------------------------
Message: 5
Date: Sun, 6 Aug 2017 20:03:26 -0500
From: Gabriel Zeifman <gabrielzeifman@xxxxx.xxx>
To: Craig Kinsman <craig@xxxxxxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] (no subject)
Message-ID: <6FCB750E-ED43-4745-946A-2A566EF3F8D5@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
RS0ISS
73,
Gabe
NJ7H/VE6NJH
> On Aug 6, 2017, at 3:12 PM, Craig Kinsman <craig@xxxxxxx.xx.xx> wrote:
>
> Dear Sir
>
> I have been trying to set up a new account at issfanclub.com and I am
asked what is the packet radio callsign.
>
> Please help me with this as I dont know it.
>
> Craig
> ZS6XKH
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Mon, 7 Aug 2017 14:11:52 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Cleaning up the Global APRS Satellite ground
station network?
Message-ID:
<CALdCfN+CxV6XmGXKPNVWTL1=0Ntsm-_yqmqyuL8brOWnjDFDCA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
I think we should better organize our autmoatied automatic APRS satelite
ground stations. We found about 330 unique IGATES feeding the APRS-IS and
the two APRS satellite networks:
http://pcsat.findu.com and http://ariss.net
For decades a hot topic at SmalSat conferences has been remote ground
station networks. Some costing $100,000 or more but with only a half dozen
other stations that seem to always be just one more software, and one more
receiver upgrade to actualy be operating.
Meantime, APRS has had global ground stations by the hundreds. They all
work fine for APRS donwlinks on 145.825.
I am not really interested (for now) in diluting this always-listening
network by spinnning off stations that can be remotely tuned to go listend
to the other hundreds of small sats and their UHF downlinks which require
tracking AND Doppler tuning, For now, I'd rather encourage more AMSATS to
use our network and provide more APRS transponders!
In addition, I'd like to at least see about making this ground station
netwrok to be TWO_WAY just like APRS was designed, so that small satellite
control operators with satellites on 145.825 can send APRS message back to
their spacecraft for control anywhere anytime. The inherent protocol does
this already (once a fground station has heard the satelite at least once
on that pass).
I do think this transmit path might need to be available only to valid
control operators, though,,,
Remember, with this many stations I have not encouraged AZ/EL active
trackign but just omni receivers. After seeign all the problems when Yaesu
rotators are run full time, I do not think that is a strong idea for hams
at home... But maybe universities who have budgets to replace warn out
equipment?
So here are just some initial thoughts about this network we already have:
PHASE 1:
Lets choose a unique set of APRS symbols to clearly identify this network.
In 2008 we expanded the APRS symbol set. FOr example the \& gateway symbol
has plenty of vacancies we can use for this purpose. Here are the existing
Gateway overlays:
/& = HF Gateway <= the original primary table definition
I& = Igate Generic (please use more specific overlay)
R& = Receive only IGate (do not send msgs back to RF)
P& = PSKmail node
T& = TX igate with path set to 1 hop only)
W& = WIRES-X as opposed to W0 for WiresII
2& = TX igate with path set to 2 hops (not generally good idea)
We could; define additional overlays for this Satellite ground
station network:
A& for Omni "AMSAT" ground station (2-way, 50W radio)
L& for Omni "AMSAT" low power or other wise less than optimum sky view
O& for Omni receive Only
H& for HFSAT (that will be our next one in a few years)
Y& for Yaggi oscar class (Gernerallyh tracks APRS sats of current interest)
U& for UHF downlinks chanel (TBD)
S& for Schools and University class (always on and can track on demand?)
and can QSY when we figure out how we want to do this... (and can afford to
wear out their stuff)
V& for Various? Since APRS has a FREUENCY SPEC already, we can assume that
all stations using these symbols are on 145.825, UNLESS they include a
different frequency in their STATUS text. A V station might be VARIOUS and
that indicates that it is auto tracking and auto tuning any satellite in
view and is beaconing that frequency in its status each time it changes
frequency.
THen lets come up with some well defined way to categorize capablities so
that it all fits in the station's STATUS packet in a consistent way.
I know there are LOTS of ideas of all kinds of automated linked ground
stations. I am not trying to disrupt all those ideas, but simple clean up
what I think is what APRS already has?
Does this seem like a plan?
Bob, WB4apr
------------------------------
Message: 7
Date: Mon, 7 Aug 2017 23:28:38 +0100
From: Graham Shirville <g.shirville@xxxxxxxxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] YOTA ARISS Contact Tuesday 8th August
Message-ID: <ea774542-221f-5fe7-455b-30b53989e92f@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi all,
Just to confirm that all the plans have now been finalised for
tomorrow's ARISS contact with the ISS from the YOTA 2017 event at
Gilwell Park near London
The FM audio downlink will be on 145.800 MHz as usual and the HAMtv
system has been switched back on today and is expected to be used by
Paolo Nespoli for the contact.
Full details about the contact, scheduled to start at 18:38utc,
including guidance about how to watch the event live on the batc
webstreams, can be found at
https://amsat-uk.org/2017/08/03/ariss-contact-yota-2017/
73
Graham G3VZV
------------------------------
Message: 8
Date: Tue, 8 Aug 2017 08:49:17 +1000
From: Andrew Rich <vk4tec@xxxxxxxxx.xx.xxx>
To: Robert Bruninga <bruninga@xxxx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Cleaning up the Global APRS Satellite ground
station network?
Message-ID: <EC098616-FD34-4CDA-B0F6-39D0FBB2BF32@xxxxxxxxx.xx.xxx>
Content-Type: text/plain; charset=us-ascii
Here is my two cents worth
Space is a valuable asset
Terrestrial aprs can do what it likes
Let's get a better "view space packets" interface
Let's make people register as a ground station
Only takes a second adds you to the filter
That way it keeps the space feed sterile
A
Sent from my iPhone
> On 8 Aug 2017, at 4:11 am, Robert Bruninga <bruninga@xxxx.xxx> wrote:
>
> I think we should better organize our autmoatied automatic APRS satelite
> ground stations. We found about 330 unique IGATES feeding the APRS-IS and
> the two APRS satellite networks:
> http://pcsat.findu.com and http://ariss.net
>
> For decades a hot topic at SmalSat conferences has been remote ground
> station networks. Some costing $100,000 or more but with only a half dozen
> other stations that seem to always be just one more software, and one more
> receiver upgrade to actualy be operating.
>
> Meantime, APRS has had global ground stations by the hundreds. They all
> work fine for APRS donwlinks on 145.825.
>
> I am not really interested (for now) in diluting this always-listening
> network by spinnning off stations that can be remotely tuned to go listend
> to the other hundreds of small sats and their UHF downlinks which require
> tracking AND Doppler tuning, For now, I'd rather encourage more AMSATS to
> use our network and provide more APRS transponders!
>
> In addition, I'd like to at least see about making this ground station
> netwrok to be TWO_WAY just like APRS was designed, so that small satellite
> control operators with satellites on 145.825 can send APRS message back to
> their spacecraft for control anywhere anytime. The inherent protocol does
> this already (once a fground station has heard the satelite at least once
> on that pass).
>
> I do think this transmit path might need to be available only to valid
> control operators, though,,,
>
> Remember, with this many stations I have not encouraged AZ/EL active
> trackign but just omni receivers. After seeign all the problems when Yaesu
> rotators are run full time, I do not think that is a strong idea for hams
> at home... But maybe universities who have budgets to replace warn out
> equipment?
>
> So here are just some initial thoughts about this network we already have:
>
> PHASE 1:
>
> Lets choose a unique set of APRS symbols to clearly identify this network.
> In 2008 we expanded the APRS symbol set. FOr example the \& gateway symbol
> has plenty of vacancies we can use for this purpose. Here are the existing
> Gateway overlays:
>
> /& = HF Gateway <= the original primary table definition
> I& = Igate Generic (please use more specific overlay)
> R& = Receive only IGate (do not send msgs back to RF)
> P& = PSKmail node
> T& = TX igate with path set to 1 hop only)
> W& = WIRES-X as opposed to W0 for WiresII
> 2& = TX igate with path set to 2 hops (not generally good idea)
>
> We could; define additional overlays for this Satellite ground
> station network:
>
> A& for Omni "AMSAT" ground station (2-way, 50W radio)
> L& for Omni "AMSAT" low power or other wise less than optimum sky view
> O& for Omni receive Only
> H& for HFSAT (that will be our next one in a few years)
> Y& for Yaggi oscar class (Gernerallyh tracks APRS sats of current interest)
> U& for UHF downlinks chanel (TBD)
> S& for Schools and University class (always on and can track on demand?)
> and can QSY when we figure out how we want to do this... (and can afford to
> wear out their stuff)
>
> V& for Various? Since APRS has a FREUENCY SPEC already, we can assume that
> all stations using these symbols are on 145.825, UNLESS they include a
> different frequency in their STATUS text. A V station might be VARIOUS and
> that indicates that it is auto tracking and auto tuning any satellite in
> view and is beaconing that frequency in its status each time it changes
> frequency.
>
>
> THen lets come up with some well defined way to categorize capablities so
> that it all fits in the station's STATUS packet in a consistent way.
>
> I know there are LOTS of ideas of all kinds of automated linked ground
> stations. I am not trying to disrupt all those ideas, but simple clean up
> what I think is what APRS already has?
>
> Does this seem like a plan?
>
> Bob, WB4apr
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Mon, 7 Aug 2017 23:18:18 +0000
From: Pedro Sousa <pedro@xxxxxxxxxx.xxxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Bright flashy object
Message-ID: <a590721e-0e12-cfb7-4d79-5f9a61bfc209@xxxxxxxxxx.xxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi all,
Tonight right after ISS passed by, in fact a few seconds after it was no
longer visible at 22:44, I spotted a bright object flashing sporadically
and traveling from southwest to northeast. It was too bright, I dare to
say brighter than the ISS itself, but the flashes didn't had the same
intensity and timings. It could have been an airplane but the strobe
lights of one can't be that bright unless it's somewhere within 1 mile.
I thought of Mayak, the Russian satellite, but at the time it was
somewhere near New Zealand, plus the orbit doesn't match what I saw. I
was to get my camera and film it, but by the time I figured it was not
an Iridium flare, which took me a solid minute staring at it, it was gone.
What amazed me was the fact that it was traveling along a very close
path as the sunset line, which could mean that it was getting on and off
the sunlight, if that makes sense at all.
Is there any other satellite up there capable of producing a flash that
bright?
73 Pedro CU2ZG
---
Este e-mail foi verificado em termos de v?rus pelo software antiv?rus Avast.
https://www.avast.com/antivirus
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
------------------------------
Message: 10
Date: Tue, 8 Aug 2017 10:18:48 +1000
From: Andrew Rich <vk4tec@xxxxxxxxx.xx.xxx>
To: Pedro Sousa <pedro@xxxxxxxxxx.xxxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Bright flashy object
Message-ID: <6551D0E3-1332-4824-93D9-E8F2B553D6B8@xxxxxxxxx.xx.xxx>
Content-Type: text/plain; charset=utf-8
Mate do you have any idea how much space junk is up there
I will not even start to guess what it could be
A
> On 8 Aug 2017, at 9:18 am, Pedro Sousa via AMSAT-BB <amsat-bb@xxxxx.xxx>
wrote:
>
> Hi all,
>
> Tonight right after ISS passed by, in fact a few seconds after it was no
> longer visible at 22:44, I spotted a bright object flashing sporadically
> and traveling from southwest to northeast. It was too bright, I dare to
> say brighter than the ISS itself, but the flashes didn't had the same
> intensity and timings. It could have been an airplane but the strobe
> lights of one can't be that bright unless it's somewhere within 1 mile.
> I thought of Mayak, the Russian satellite, but at the time it was
> somewhere near New Zealand, plus the orbit doesn't match what I saw. I
> was to get my camera and film it, but by the time I figured it was not
> an Iridium flare, which took me a solid minute staring at it, it was gone.
> What amazed me was the fact that it was traveling along a very close
> path as the sunset line, which could mean that it was getting on and off
> the sunlight, if that makes sense at all.
> Is there any other satellite up there capable of producing a flash that
> bright?
>
> 73 Pedro CU2ZG
>
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Message: 11
Date: Tue, 8 Aug 2017 00:50:30 +0000 (UTC)
From: Dave Ryan <dave4e@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Cleaning up the Global APRS Satellite ground
station network?
Message-ID: <987139575.1510926.1502153430376@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Bob
I run an RX only i-gate in the UK MB7UEI-6.
Currently it uses AZ/EL active tracking antennas, VHF and UHF wimo Xquads,
the system runs 24/7 and also tracks the 3 Funcube sats, I have plans to
expand this further and include the station on WEBSDR,?
I would be interested to participate.
Regards
Dave EI4HT / M0GIW
------------------------------
Message: 12
Date: Tue, 8 Aug 2017 00:44:12 -0400
From: Scott <scott23192@xxxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Cleaning up the Global APRS Satellite ground
station network?
Message-ID:
<CAJCSnOYH7t_LTbwD=1i86f98WPnGBccug7MtcJDjY2hthwiQVQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Thanks for always thinking of ways to enhance the great APRS system, Bob.
I originally became a member of the "iGate Club" back when the ISS
digipeater temporarily transitioned to UHF. With the initial shortage of
iGates on 70cm and plenty of SDRs & Raspberry Pi computers in the house, I
did my best to follow the online documentation on how to setup an RX-Only
iGate. It was quite a thrill to see my K4KDR-10 iGate submit a respectable
number of digipeated packets to ariss.net.
Since the return to 145.825, my setup has not been as effective but I'll
look forward to being a better contributor as more satellites (not to
mention a repaired ISS digipeater) become active on 2 meter APRS.
Following your "PHASE-1" recommendation, I have modified my iGate config to
use the "Omni receive Only" symbol by changing my PBEACON string to:
PBEACON sendto=IG delay=0:30 every=10:00 symbol=O& comment="Raspberry Pi
iGate on 145.825 -- Omni Antenna, RX-Only" lat=37^46.72N long=77^36.58W
... and the result shows up graphically on aprs.fi as shown on this screen
image:
http://www.qsl.net/k/k4kdr//files/2017-08-08--k4kdr-10--aprs-status.png
... so, other than the fact that my status text message is completely
redundant to the "O" symbol AND is also redundant to the implied RX
frequency of 145.825, have I followed the spirit of the PHASE-1
recommendation to display a symbol icon that is a better indication of my
iGate's configuration?
-Scott, K4KDR
=================================================
=================================================
On Mon, Aug 7, 2017 at 2:11 PM, Robert Bruninga <bruninga@xxxx.xxx> wrote:
> I think we should better organize our automated automatic APRS satellite
> ground stations. We found about 330 unique IGATES feeding the APRS-IS and
> the two APRS satellite networks:
> http://pcsat.findu.com and http://ariss.net
>
> For decades a hot topic at SmalSat conferences has been remote ground
> station networks. Some costing $100,000 or more but with only a half dozen
> other stations that seem to always be just one more software, and one more
> receiver upgrade to actualy be operating.
>
> Meantime, APRS has had global ground stations by the hundreds. They all
> work fine for APRS donwlinks on 145.825.
>
> I am not really interested (for now) in diluting this always-listening
> network by spinnning off stations that can be remotely tuned to go listend
> to the other hundreds of small sats and their UHF downlinks which require
> tracking AND Doppler tuning, For now, I'd rather encourage more AMSATS to
> use our network and provide more APRS transponders!
>
> In addition, I'd like to at least see about making this ground station
> netwrok to be TWO_WAY just like APRS was designed, so that small satellite
> control operators with satellites on 145.825 can send APRS message back to
> their spacecraft for control anywhere anytime. The inherent protocol does
> this already (once a fground station has heard the satelite at least once
> on that pass).
>
> I do think this transmit path might need to be available only to valid
> control operators, though,,,
>
> Remember, with this many stations I have not encouraged AZ/EL active
> trackign but just omni receivers. After seeign all the problems when Yaesu
> rotators are run full time, I do not think that is a strong idea for hams
> at home... But maybe universities who have budgets to replace warn out
> equipment?
>
> So here are just some initial thoughts about this network we already have:
>
> PHASE 1:
>
> Lets choose a unique set of APRS symbols to clearly identify this network.
> In 2008 we expanded the APRS symbol set. FOr example the \& gateway symbol
> has plenty of vacancies we can use for this purpose. Here are the existing
> Gateway overlays:
>
> /& = HF Gateway <= the original primary table definition
> I& = Igate Generic (please use more specific overlay)
> R& = Receive only IGate (do not send msgs back to RF)
> P& = PSKmail node
> T& = TX igate with path set to 1 hop only)
> W& = WIRES-X as opposed to W0 for WiresII
> 2& = TX igate with path set to 2 hops (not generally good idea)
>
> We could; define additional overlays for this Satellite ground
> station network:
>
> A& for Omni "AMSAT" ground station (2-way, 50W radio)
> L& for Omni "AMSAT" low power or other wise less than optimum sky view
> O& for Omni receive Only
> H& for HFSAT (that will be our next one in a few years)
> Y& for Yaggi oscar class (Gernerallyh tracks APRS sats of current interest)
> U& for UHF downlinks chanel (TBD)
> S& for Schools and University class (always on and can track on demand?)
> and can QSY when we figure out how we want to do this... (and can afford to
> wear out their stuff)
>
> V& for Various? Since APRS has a FREUENCY SPEC already, we can assume that
> all stations using these symbols are on 145.825, UNLESS they include a
> different frequency in their STATUS text. A V station might be VARIOUS and
> that indicates that it is auto tracking and auto tuning any satellite in
> view and is beaconing that frequency in its status each time it changes
> frequency.
>
>
> THen lets come up with some well defined way to categorize capablities so
> that it all fits in the station's STATUS packet in a consistent way.
>
> I know there are LOTS of ideas of all kinds of automated linked ground
> stations. I am not trying to disrupt all those ideas, but simple clean up
> what I think is what APRS already has?
>
> Does this seem like a plan?
>
> Bob, WB4apr
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 12, Issue 191
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