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CX2SA > SATDIG 18.12.16 20:22l 867 Lines 28067 Bytes #999 (0) @ WW
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Path: IW8PGT<IR2UBX<DB0RES<DB0OVN<DB0GOS<ON0AR<OZ5BBS<CX2SA
Sent: 161218/1809Z @:CX2SA.SAL.URY.SOAM #:60320 [Salto] FBB7.00e $:AMSATBB11397
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Pratham Satellite Heard (GW1FKY@xxx.xxxx
2. Re: Pratham: IITB Student Satellite Beacon Active
(Jean-Pierre Godet)
3. ISS packet 70cm weak? (PA3GUO)
4. Re: ANS-353 AMSAT News Service Weekly Bulletins (Pedro Sousa)
5. Gonna be on 1606 UTC ISS digi pass trying to make a video of
a 2-way contact. - KG4AKV (John Brier)
6. Copied PRATHAM here in michigan (jeffory broughton)
7. Re: ISS packet 70cm weak? (Scott)
8. SatPC32 - Yaesu-232B follow up (Brian Sarkisian, KG8CO)
9. Satellite APRS balloon over NA + Galileo + Dec 19 ISS CubeSat
(M5AKA)
10. Re: ISS packet 70cm weak? (Nitin Muttin)
11. Re: ISS packet 70cm weak? (Jari A)
12. Re: ISS packet 70cm weak? (Patrick STODDARD (WD9EWK/VA7EWK))
----------------------------------------------------------------------
Message: 1
Date: Sun, 18 Dec 2016 06:27:46 -0500
From: GW1FKY@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Pratham Satellite Heard
Message-ID: <69b18f.39169625.4587ccb2@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Further to the reports regarding "Pratham " being heard on145.980 Mhz.
I am pleased to report and add my call- sign and country to the list of
those that have once again heard the
satellite beacon.
Sunday 18th December 2016 pass beginning 1105 hrs - going North to south
max elevation 39 degress.
Same equipment "Elk " antenna with tracking software and my Kenwood
TS-2000 - Same warbling signal
and easy to copy as I heard in the very early stages after its launch - No
confusion.
Ken Eaton
GW1FKY
Amsat -UK
Amsat NA
------------------------------
Message: 2
Date: Sun, 18 Dec 2016 11:39:38 +0000
From: Jean-Pierre Godet <godetj@xxxxxxx.xx>
To: PE0SAT | Amateur Radio <pe0sat@xxxxx.xx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Pratham: IITB Student Satellite Beacon Active
Message-ID: <a1a6405c-2fad-69e5-e4f8-a48df2ab3454@xxxxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Jan, your reception is better than mine ! Thank you for the link to
By the way looks like, comparing with september records, that the
signal level is lower. No ? I agree, my equipment is not too good.
A piece of the record of this morning pass is here :
http://f5yg.pagesperso-orange.fr/incoming/PRATHAM_orb1216_18dec2016
With a vertical half-wave antenna (physically 1/2 wave, electrically
3/4 wave) over a large ground plane hidden in the attic, the AMSAT-UK
FCD-Pro+, Gqrx as SDR prgm, GPredict for the Doppler tracking.
Have a nice Sunday, 73 !
Jean-Pierre F5YG
On 17/12/2016 12:27, PE0SAT | Amateur Radio wrote:
>
>
> Good to hear that more station are receiving PRATHAM on VHF.
>
> My last pass of this morning 12:06 UTC was also successful, but again no
> signals on UHF.
>
> If you want to see how this satellite sounds, I have a SDRSharp Base
> band IQ on the following
> location. The SDR that I used for this recording is a FUNcube Dongle
> Pro+ at 192000 samples/second.
>
> https://janvgils.home.xs4all.nl/download/PRATHAM/
>
> Sorry for the mess in the spectrum, but as you can see I have some
> terrible QRM on VHF.
>
> 73 Jan
>
> ---
> With regards PE0SAT
> Internet web-page http://www.pe0sat.vgnet.nl/
> DK3WN SatBlog http://www.dk3wn.info/p/
> Online Telemetry Forwarder: http://tlm.pe0sat.nl/
> irc://chat.freenode.net #Cubesat - Twitter @xxxxxx
>
> On 17-12-2016 10:29, Jean-Pierre Godet wrote:
>> Hi my friends !
>>
>> Heard VHF CW beacon in western Europe, around 09:00 UTC, orbit nr
>> 1201, 15 deg. max pass above horizont. I fully agree with Greg/KO6TH:
>> "Good to hear the Chirpy Sat again!". :-)
>>
>> Have a nice day, 73!
>>
>> Jean-Pierre/F5YG
>>
>> On 17/12/2016 03:47, Greg D wrote:
>>
>>> 03:33z 10-degree pass from CM98, heard the same here on 2m. Good to
>>> hear the Chirpy Sat again!
>>>
>>> Sorry, no FSK (presume 9600 bps?) capability.
>>>
>>> Greg KO6TH
>>>
>>>
>>> Paulo PV8DX wrote:
>>>> Hi
>>>> Heard in the extreme north of Brazil.
>>>>
>>>> Repeats in Morse Code
>>>> VU2BUG PRATHAM IIT BOMBAY STUDENT SATELLITE
>>>>
>>>> 17 DEC 2016 - 01:47 UTC
>>>>
>>>> link
>>>> https://youtu.be/m_kLNHT4w6k
>>>>
>>>>
>>>> 73 de Paulo PV8DX
>>>> LABRE/ARRL
>>>> AMSAT-BR/AMSAT-NA member
>>>> FJ92pt - VUCC SAT
>>>> http://amsat-br.org/
>>>> www.qrz.com/db/pv8dx
>>>> Contact ARISS 13/fev/2014
>>>> http://www.labre-rr.org/ariss.html
>>>> Boa Vista-Roraima-Brasil
>>>> pv8dx@xxxx.xxx
>>>>
>>>>
>>>> -----Mensagem Original----- From: Aayush Yadav
>>>> Sent: Friday, December 16, 2016 5:16 PM
>>>> To: amsat-bb@xxxxx.xxx ; Rachana Agarwal ; Subramani BA ; Mani VU2 WMY
>>>> ; Manvi Dhawan ; Ratnesh Mishra
>>>> Subject: Re: [amsat-bb] Pratham: IITB Student Satellite
>>>>
>>>> Hello all,
>>>>
>>>> We are glad to inform you that PE0SAT was able to receive the beacon
>>>> of the
>>>> satellite yet again. We have started the preparation to track the
>>>> satellite
>>>> in the hopes of establishing if the satellite is active again. We
>>>> would be
>>>> glad if you could help us in this and try receiving the signal from
>>>> Pratham.
>>>>
>>>> Downlink:
>>>> Frequency: 437.455 MHz
>>>> Modulation: FSK
>>>>
>>>> Beacon:
>>>> Frequency: 145.98 MHz
>>>> Modulation: CW
>>>> OOK Morse code.
>>>>
>>>> Kind Regards,
>>>> Team Pratham.
>>>> _______________________________________________
>>>> 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
>>>
>>> _______________________________________________
>>> 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: 3
Date: Sun, 18 Dec 2016 16:20:53 +0300
From: PA3GUO <pa3guo@xxxxxxx.xx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ISS packet 70cm weak?
Message-ID: <1482067253.783917132@xx.xx.xxx>
Content-Type: text/plain; charset=utf-8
Anyone else finds the signals weak ?
Uplink as well as downlink?
Maybe worse in EU compared to other continents?
PA3GUO
Henk
------------------------------
Message: 4
Date: Sun, 18 Dec 2016 13:33:39 -0100
From: Pedro Sousa <pedro@xxxxxxxxxx.xxxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] ANS-353 AMSAT News Service Weekly Bulletins
Message-ID: <1e2a4cc8-c808-c56e-94fe-6b5cef24e8d3@xxxxxxxxxx.xxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi,
Just a correction: the Christmas Weekend Operation will be on HM58, and
not HM85.
73s Pedro CU2ZG
On 2016-12-18 00:51, Lee McLamb wrote:
> AMSAT NEWS SERVICE
> ANS-353
>
> The AMSAT News Service bulletins are a free, weekly news and infor-
> mation service of AMSAT North America, The Radio Amateur Satellite
> Corporation. ANS publishes news related to Amateur Radio in Space
> including reports on the activities of a worldwide group of Amateur
> Radio operators who share an active interest in designing, building,
> launching and communicating through analog and digital Amateur Radio
> satellites.
>
> The news feed on http://www.amsat.org publishes news of Amateur
> Radio in Space as soon as our volunteers can post it.
>
> Please send any amateur satellite news or reports to:
> ans-editor at amsat.org.
>
> In this edition:
>
> * Gould Smith, WA4SXM appointed Director-Field Operations
> * AO-73/FUNcube Holiday Transponder Operation
> * HM85 Christmas Weekend Operation
> * 18 Years of SSTV and Human Spaceflight
> * WB8ELK Balloon Completes Second Lap Around the World
> * 18th Annual Long Island Section Convention
>
>
> SB SAT @ AMSAT $ANS-353.01
> ANS-353 AMSAT News Service Weekly Bulletins
>
> AMSAT News Service Bulletin 353.01
> From AMSAT HQ KENSINGTON, MD.
> DATE December 18, 2016
> To All RADIO AMATEURS
> BID: $ANS-353.01
>
> Gould Smith, WA4SXM appointed Director-Field Operations
>
> AMSAT President Barry Baines, WD4ASW has appointed G. Gould Smith,
> WA4SXM as
> Director-Field Operations. The public announcement was made during
> the Field
> Operations Forum held in conjunction with the 34th AMSAT Space
> Symposium held on
> board Carnival Liberty on 12 Nov 2016.
>
> Field Operations consists of AMSAT volunteers who serve as Area
> Coordinators in
> their local areas. As ?Ambassadors of AMSAT?, they give AMSAT
> presentations at
> local club meetings or at hamfests, manage an AMSAT table/booth at a
> hamfest, or
> support local satellite operations as ?elmers? to new satellite
> operators.
>
> Gould previously served as Director-Field Operations from 2004-2008
> prior to
> becoming VP-User Services from 2008-2013. Gould is also the author of
> several
> books published by AMSAT starting in 1990 with ?Getting Started With
> Amateur
> Satellites? the current AMSAT publication that carries his name. Due
> to medical
> issues, Gould was forced to resign from the Board of Directors and as
> VP-User
> Services in 2014 to focus on his medical concerns. Two years later,
> Gould?s
> medical recovery is now such that he?s once again in position to
> support AMSAT.
>
> In conjunction with this transition, Patrick Stoddard, WD9EWK now
> serves as
> ?Lead Area Coordinator?, essentially functioning as Gould?s Executive
> Officer.
> Together, Gould and Patrick will work to enhance the Field Organization.
>
> ?Having Gould back in an AMSAT leadership role is welcome news? notes
> AMSAT
> President Barry Baines, WD4ASW. ?Gould is passionate about amateur
> radio in
> space and wants to encourage amateurs to become involved with satellite
> operations. The Field Organization will benefit from Gould?s focus on
> providing
> support to our Area Coordinators and developing materials that will
> assist our
> volunteers to speak on AMSAT?s behalf at club presentations and
> hamfests.?
>
> Initially, Gould has been spending some time getting back up to speed
> on the
> current status of the Field Organization and establishing a line of
> communication with the Field Ops Team. Gould notes, ?As a long time
> AMSAT
> volunteer I am excited to be re-engaging with the organization since
> my health
> has improved significantly. The Field Operations position is one that
> I have
> experience with and am looking forward to leading with the help of
> Patrick,
> WD9EWK. I have looked at the current Area Coordinator list and their
> activities
> and know most of the members. One of the first things I will be doing
> is getting
> to know the newer coordinators and determining how best we can serve
> AMSAT, it's
> members and prospective members. Please let me know of any ideas or
> suggestions
> to improve he Field Operations team.?
>
> [ANS thanks AMSAT President Barry Baines, WD4ASW, for the above
> information]
>
>
> ---------------------------------------------------------------------
>
> AO-73/FUNcube Holiday Transponder Operation
>
> The AO-73/FUNcube plan for the Holidays is to switch to continuous
> transponder
> mode on Wed 22 Dec pm UTC, and revert back to auto transponder
> switching on
> Sunday 8 Jan 2017 ppm UTC.
>
> Have FUN with the transponder.
>
> [ANS thanks Jim, G3WGM, for the above information]
>
>
> ---------------------------------------------------------------------
>
>
> HM85 Christmas Weekend Operation
>
> Pedro, CU2ZG, reports that Christmas HM58 operation will take place from
> December 23rd to December 25th. Pedro will be SSB equipped and plans to
> operate on the following satellites: AO-7, FO-29, SO-50, AO-73, EO-79,
> XW-2A/B/C/D/F, and AO-85.
>
> Logs will be uploaded as CU2ZG.
>
> [ANS thanks Pedro, CU2ZG, for the above information]
>
>
> ---------------------------------------------------------------------
>
> 18 Years of SSTV and Human Spaceflight
>
> December 12, 2016, marked the 18th anniversary of the activation of
> the MIR SSTV
> Amateur Radio developed System which was transported and put aboard
> the MIR
> Space Station. The MIR SSTV System sent pictures over a period of
> about 2
> years and 4 months to the delight of Amateur Radio Operators and others
> worldwide. (Mir was deorbited in March, 2001) For those interested in
> this
> historical event and background, the publication Amateur Television
> Quarterly
> (ATVQ), Spring 2015 issue has an article, ?How Did the MIR SSTV
> System come
> into Existence?? Back issue copies of ATVQ containing this article are
> available via WA6SVT@xxx.xxx. See also web address:
> www.ATVQuarterly.com.
>
> A small sampling of perhaps thousands of received pictures may be
> found in web
> sites:
>
> http://www.marexmg.org/marexmirweb/fileshtml/galleryimagepage1.htm
>
> http://www.qsl.net/dg7ro/afu/mirsstv.htm
>
> Background information and initial efforts on developing the MIR
> System and
> early efforts to provide SSTV for the ISS may be reviewed at:
>
> http://www.marexmg.org/fileshtml/sponsorspeople.htm
>
> The ISS is now transmitting a similar series of SSTV Transmissions to
> that of
> MIR:
>
> https://amsat-uk.org/beginners/iss-sstv
>
> [ANS thanks Farrell, W8ZCF, for the above information]
>
>
> ---------------------------------------------------------------------
>
>
> WB8ELK Balloon Completes Second Lap Around the World
>
> After flying for over 41,000 miles, the WB8ELK HF WSPR Skytracker
> balloon has
> completed its second lap after crossing over into Indiana on 12 Dec
> 2016. For
> those of you capable of listening to 20m WSPR mode, it transmits at
> the 4-minute
> and 6-minute marks every 10 minutes on 14.09560 MHz USB during
> daylight hours.
>
> [ANS thanks Bill WB8ELK and the BALLOON_SKED group on yahoogroups for
> the above
> information]
>
>
> ---------------------------------------------------------------------
>
> 18th Annual Long Island Section Convention
>
> Ham Radio University (HRU) is scheduled for January 8th, 2017, there
> will be 30
> forums with Tom Gallagher, CEO, of ARRL as the keynote speaker.
>
> Peter, W2JV, will be doing a forum at 10 AM on ?Getting Started with
> the Amateur
> Satellites?, AMSAT will have a table in the club room to answer your
> questions.
> There will be demonstrations on the air as time and weather permits,
> on both the
> FM and linear transponder satellites. Look for W2JV, or others on the
> air.
>
> [ANS thanks Peter, W2JV, for the above information
>
> /EX
>
> In addition to regular membership, AMSAT offers membership in the
> President's Club. Members of the President's Club, as sustaining
> donors to AMSAT Project Funds, will be eligible to receive addi-
> tional benefits. Application forms are available from the AMSAT
> Office.
>
> Primary and secondary school students are eligible for membership
> at one-half the standard yearly rate. Post-secondary school students
> enrolled in at least half time status shall be eligible for the stu-
> dent rate for a maximum of 6 post-secondary years in this status.
> Contact Martha at the AMSAT Office for additional student membership
> information.
>
> 73,
> This week's ANS Editor,
> Lee McLamb, KU4OS
> ku4os at amsat dot org
>
>
> _______________________________________________
> 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
>
---
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------------------------------
Message: 5
Date: Sun, 18 Dec 2016 10:08:15 -0500
From: John Brier <johnbrier@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Gonna be on 1606 UTC ISS digi pass trying to make
a video of a 2-way contact. - KG4AKV
Message-ID:
<CALn0fKP=rWd+Cj=zvbr=gf4=my3_ZvjFKdmFNciypie56nB2cA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
FYI.
------------------------------
Message: 6
Date: Sun, 18 Dec 2016 11:12:47 -0500
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Copied PRATHAM here in michigan
Message-ID:
<CACm2je1EFYvR1mhDHE79J4ufGzVtHOGdRzsEyF8FPEgfGLrG+Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Strong signal on 145.980 mhz it was sending cw at 36 wpm.kept repeating ,
PRATHAM student satellite VU2BUG
BOMBAY OVER AND OVER AGAIN.
jeff broughton
------------------------------
Message: 7
Date: Sun, 18 Dec 2016 12:05:14 -0500
From: "Scott" <scott23192@xxxxx.xxx>
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] ISS packet 70cm weak?
Message-ID: <CC3DBEC8E13546D59C017F31B50F62AD@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
While it's not a direct measurement (so many factors in play), there have
certainly been fewer stations iGated to the ariss.net web page on the last
several passes over the U.S. as well.
-Scott, K4KDR
twitter: @xxxxxxxxxx
------------------------------------------------------------------------------
--
-----Original Message-----
From: PA3GUO
Sent: Sunday, December 18, 2016 8:20 AM
To: amsat-bb
Subject: [amsat-bb] ISS packet 70cm weak?
Anyone else finds the signals weak ?
Uplink as well as downlink?
Maybe worse in EU compared to other continents?
PA3GUO
Henk
------------------------------
Message: 8
Date: Sun, 18 Dec 2016 17:12:21 +0000 (UTC)
From: "Brian Sarkisian, KG8CO" <cqkg8co@xxxxx.xxx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SatPC32 - Yaesu-232B follow up
Message-ID: <1471759930.1135454.1482081141919@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
?At this point, I now have the computer talking to the GS-232B and talking
to the G-5500.
I was having the issue with the Sat32PC version C. ? Version C was looking
for Yaesu SDX program.
As it turns out, it couldn't find the SDX program in Version C, however, I
uninstalled version C and installedVersion B the SDX program appeared. ?(not
sure why)
So at this point .... things are communicating.
So here is the next question.
The elevation and azimuth readings on the computer and rotor control box do
not match up. ?It seems the meters on the Yaesu control box move much faster
than the readings on computer.
I have adjusted the output adjustment pots on the rotor control box, and
this is the best I can come up with for comparison purposes ......
When the rotor controls say the elevation is at 45 the computer says 22
When the rotor controls says the azimuth is at 180 the computer says 146
Are there any suggestions.
Thank you
Brian, KG8CO
------------------------------
Message: 9
Date: Sun, 18 Dec 2016 17:28:11 +0000 (UTC)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Satellite APRS balloon over NA + Galileo + Dec 19
ISS CubeSat
Message-ID: <1084666295.8651021.1482082091391@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
UK student Around-the-World balloon with 434 MHz Contestia and 145.825 MHz
APRS crosses Pacific and is now over North America
https://amsat-uk.org/2016/12/09/ubseds21-145-825-aprs/
Real-Time
track?https://tracker.habhub.org/#!mt=roadmap&mz=2&qm=All&f=UBSEDS21&q=UBSEDS2
1
ISS CubeSats with Amateur Radio payloads may be deployed from December 19
https://amsat-uk.org/2016/12/02/school-tancredo-1-tubesat/
Galileo GNSS/satnav system now live. Read the Peter Blair G3LTF 2006 paper
on the 1260-1300 MHz downlink
http://www.southgatearc.org/articles/galileo.htm
Satellite launches planned for end of December
- BY70-1 FM transponder satellite from Taiyuan Satellite Launch Center
(TSLC) December 26
- CubeSats from Jiuquan Satellite Launch Center (JSLC) December 31? Anyone
know what the CubeSats are?
The book Getting Started with Amateur Satellites is available from the
AMSAT-UK shop
https://amsat-uk.org/2016/06/27/getting-started-with-amateur-satellites-2016/
73 Trevor M5AKA
----
AMSAT-UK?http://amsat-uk.org/
Twitter?https://twitter.com/AmsatUK
Facebook https://facebook.com/AmsatUK
YouTube?https://youtube.com/AmsatUK
----
------------------------------
Message: 10
Date: Sun, 18 Dec 2016 17:55:29 +0000 (UTC)
From: Nitin Muttin <vu3tyg@xxxxx.xx.xx>
To: PA3GUO <pa3guo@xxxxxxx.xx>, amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] ISS packet 70cm weak?
Message-ID: <1137692639.5328171.1482083729782@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Observe the same over India and south east Asia. Maybe some stations from
south east Asia can share their observations.?73
Nitin [VU3TYG]
From: PA3GUO <pa3guo@xxxxxxx.xx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Sent: Sunday, 18 December 2016 6:50 PM
Subject: [amsat-bb] ISS packet 70cm weak?
Anyone else finds the signals weak ?
Uplink as well as downlink?
Maybe worse in EU compared to other continents?
PA3GUO
Henk
_______________________________________________
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: 11
Date: Sun, 18 Dec 2016 20:03:17 +0200
From: Jari A <oh2fqv@xxxxx.xxx>
To: Nitin Muttin <vu3tyg@xxxxx.xx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] ISS packet 70cm weak?
Message-ID:
<CAEVbYfm_U0s+TM=MwQv5mP=fOLxX9jCJTcsf8an5GX6he+rOYg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
With several passes and attempt's to digipeat: ISS UHF is surprisingly weak
and hard to reach. KP20MF. 35W and 10 el yagi
Regards,
:Jari / OH2FQV
On Sun, Dec 18, 2016 at 7:55 PM, Nitin Muttin via AMSAT-BB <
amsat-bb@xxxxx.xxx> wrote:
> Observe the same over India and south east Asia. Maybe some stations from
> south east Asia can share their observations. 73
> Nitin [VU3TYG]
>
> From: PA3GUO <pa3guo@xxxxxxx.xx>
> To: amsat-bb <amsat-bb@xxxxx.xxx>
> Sent: Sunday, 18 December 2016 6:50 PM
> Subject: [amsat-bb] ISS packet 70cm weak?
>
>
> Anyone else finds the signals weak ?
> Uplink as well as downlink?
> Maybe worse in EU compared to other continents?
> PA3GUO
> Henk
> _______________________________________________
> 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.
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>
>
> _______________________________________________
> 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
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------------------------------
Message: 12
Date: Sun, 18 Dec 2016 18:06:37 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] ISS packet 70cm weak?
Message-ID:
<CAN6TEUcmmqbMRYbHCW9wKA0v4+=uxH+E4hjuBf5Ub16r-fezQw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi!
If the two Ericsson HTs used on the ISS have the same power output,
70cm signals should be weaker than what we heard on 2m. There
would be higher losses in the coax between the radio and antenna,
along with a higher path loss, using 70cm. I also notice that how
I align my antenna is more important when working the ISS on
437.550 MHz than when it was on 145.825 MHz.
Uplink issues could be similar to what is happening on the ISS.
Transmitter power, coax loss, path loss... they all play a part
in this.
With all of that said, I am able to deal with having to twist my
Elk log periodic more, and also changing frequencies (memory
channels in my HTs) to compensate for Doppler on 437.550 MHz. It
takes a little more work, but for me it isn't much different
than working ISS or the weaker NO-84 digipeater (when active)
on 145.825 MHz. I think the shift to 70cm has been harder for the
home stations that use vertical antennas, and the radios are not
under computer control. Those stations are having a tougher time
coping with the operations on 70cm. Based on some comments I have
received directly and seen in a few online forums, those using
2m/70cm verticals with gain are really struggling. The radiation
patterns of many of those antennas on 70cm just isn't good for
working something up in the sky. Some of those antennas (for those
in the Americas) are also tuned for 440-450 MHz, and perform
poorly below that range.
Not as many gateway stations are listening to 437.550 MHz, but there
are a few using stations with computer control that are able to
track the ISS as it goes across the sky. That has helped to populate
the listing and map on ariss.net, but is not a perfect replacement
for the many other stations that are on 145.825 MHz. Regardless
of the number of gateways listening on 70cm, I'm still having fun
trying different antennas and seeing more stations give ISS packet
on 70cm a try.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @xxxxxx
On Sun, Dec 18, 2016 at 1:20 PM, PA3GUO <pa3guo@xxxxxxx.xx> wrote:
>
> Anyone else finds the signals weak ?
> Uplink as well as downlink?
> Maybe worse in EU compared to other continents?
> PA3GUO
> Henk
>
>
------------------------------
Subject: Digest Footer
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Sent via amsat-bb@xxxxx.xxx.
AMSAT-NA makes this open forum available to all interested persons worldwide
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AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
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End of AMSAT-BB Digest, Vol 11, Issue 397
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