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CX2SA > SATDIG 18.07.17 17:00l 875 Lines 30819 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Long shot: August eclipse intersecting any Oscars? (Greg D)
2. Test Message (Steve Appleton)
3. Re: Test Message (Gabriel Zeifman)
4. Test Message Update (Steve Appleton)
5. Re: SatPC32 and HDSDR (Tom Schuessler)
6. Re: Test Message Update (Bill Booth)
7. ANS 197 (Christopher Bradley)
8. Narrowband tuning of DCI filters? (Robert Bruninga)
9. Re: Narrowband tuning of DCI filters? (Norm n3ykf)
10. Re: Several satellites identified (Nico Janssen)
11. Russian Thing (Joe)
12. Re: Russian Thing (JoAnne K9JKM)
----------------------------------------------------------------------
Message: 1
Date: Sun, 16 Jul 2017 16:38:33 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Cc: David G0MRF <g0mrf@xxx.xxx>
Subject: Re: [amsat-bb] Long shot: August eclipse intersecting any
Oscars?
Message-ID: <7a44faa8-5db8-bb68-efff-2b4eebd944e0@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
For anyone following this... Digging into the NASA site regarding the
eclipse, it appears that the circle of partial eclipse covers a good
portion of the entire NA Continent. So, while the "bulls eye" of
totality is fairly small (and therefore hard to hit), the size of the
partial eclipse zone is very wide. It takes about 2 hrs to go from the
first hint of the eclipse to when the last is gone, and any satellite
crossing through that zone during those 2 hrs will experience some of
the eclipse dimming. Given this, I expect that AO-73 is not the only
OSCAR satellite that will experience being hit by the eclipse to some
degree.
See: https://eclipse.gsfc.nasa.gov/SEplot/SEplot2001/SE2017Aug21T.GIF
So, now I wonder... Given that the zone of partiality takes 2 hrs to
cross any particular location, and a satellite's full orbit is quicker
than that, are any satellites going to experience the effect twice?
Greg KO6TH
Graham Shirville wrote:
> Hi All,
>
> To follow on from David's email, I can confirm that EO73 has already
> experienced an eclipse - this was back in March 2015. The solar panel
> WOD results are detailed here
> https://funcube.org.uk/2015/03/20/solar-eclipse-update/ and we have
> the records for all the available telemetry stored in the Warehouse if
> anyone would like more detail of what happened.
>
> We are fortunate to have Whole Orbit Data available in addition to the
> Real Time channels so it should be possible to gather lots of
> information next month. Of course the EO-88 and UKube-1 CubeSats also
> carry similar FUNcube payloads so these spacecraft could also be
> checked to see if their orbits will "see" the eclipse.
>
> 73
>
> Graham
> G3VZV
>
> -----Original Message----- From: David G0MRF via AMSAT-BB
> Sent: Friday, July 14, 2017 8:18 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Long shot: August eclipse intersecting any Oscars?
>
> Hi Greg
>
> Sorry, only just seen your post.
>
> I believe the answer is yes. I'll have a look at the exact pass times
> over the weekend.
>
> AO-73 will fly through the path of the eclipse on the 21st August and
> the effects should be seen on its real time telemetry.
>
> AO-73 has temperature and light sensors on its solar panels and this
> data is collected and sent every 5 seconds.
> You should easily see the change in light levels and perhaps, a change
> in external temperature as heat energy is lost as IR radiation. -
> Although this will depend on the degree of coverage of the sun during
> the satellite pass.
>
> You may also see the total panel current ( The sum of the current
> supplied by the solar panels) drop dramatically.
> Fortunately most LEO sats are designed to handle 'eclipses' of 35
> minutes, so this minor glitch in power collect should not adversly
> affect operation.
>
> All of these will be displayed as graphs if you are collecting data on
> the Funcube dashboard. - Free windows download.
>
> In the case of AO-73, it usually switches to transponder mode in
> eclipse. Will it do that on the 21st ??
>
> Good luck. If you give it a try, let us know how you get on.
>
> David
>
>
> Hi folks,
>
> I was asked this on our club's weekly net last week. I expect the
> answer is no, but thought I should check...
>
> Will any of the ham satellites be affected by next month's solar eclipse
> across the USA? To be affected, the satellite's track (at some 18,000
> mph) would need to intersect some portion of the eclipse (not
> necessarily the path of totality), which I understand is moving at some
> 1,500 mph. Given the speeds involved, that's unlikely. But we've got a
> number of satellites in sun synchronous orbits, so it's not impossible.
>
> Any way to predict this?
>
> If there are any, the telemetry from the event would be an awesome bit
> of data for students' analysis.
>
> Greg KO6TH
>
> p.s. I remember being at work (I think in the 1990's) during an
> eclipse. As I recall, the spot of totality was out in the Pacific
> Ocean, off the coast of Mexico. The real-time satellite weather
> background on my Unix workstation looked like someone had burned a hole
> in it with a cigarette.
>
> _______________________________________________
> 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: 2
Date: Sun, 16 Jul 2017 21:33:19 -0400
From: "Steve Appleton" <k4ph@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Test Message
Message-ID: <73696C6929C0444088B222A45751BCBF@xxxxxxx>
Content-Type: text/plain; charset="utf-8"
I have not received a digest of the amsat-bb mailing list in weeks. I?m
sending this message to see if it gets reflected back in tomorrows digest.
-
------------------------------
Message: 3
Date: Sun, 16 Jul 2017 23:47:25 -0200
From: Gabriel Zeifman <gabrielzeifman@xxxxx.xxx>
To: Steve Appleton <k4ph@xxxxxxxxxx.xxx>
Cc: AMSAT Mailing List <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Test Message
Message-ID:
<CAEGYLCuuPsc7de=FRxY3MPtwHBEWjjFumKfF2ongr=iUZxq_Dg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
The BB is working just as always. What an astonishingly reliable forum to
share information among the world's satellite operators!
73,
Gabe
NJ7H
On Sun, Jul 16, 2017 at 11:33 PM, Steve Appleton <k4ph@xxxxxxxxxx.xxx>
wrote:
> I have not received a digest of the amsat-bb mailing list in weeks. I?m
> sending this message to see if it gets reflected back in tomorrows digest.
> -
> _______________________________________________
> 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, 16 Jul 2017 21:56:12 -0400
From: "Steve Appleton" <k4ph@xxxxxxxxxx.xxx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Test Message Update
Message-ID: <38D93550036E4E74942D8D648538C8CE@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Okay, found the problem. For some reason my ISP had amsat.org as a blocked
domain. Not sure why that was but I cleared that and all is right with the
world. Thanks to those who responded directly.
-k4ph
------------------------------
Message: 5
Date: Sun, 16 Jul 2017 21:44:30 -0500
From: "Tom Schuessler" <tjschuessler@xxxxxxx.xxx>
To: "'Erich Eichmann'" <erich.eichmann@xxxxxxxx.xx>,
<AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] SatPC32 and HDSDR
Message-ID: <005801d2fea6$9e272f00$da758d00$@xxx>
Content-Type: text/plain; charset="us-ascii"
Eric,
I am still confused by the reverse Sideband mode when doing CAT control of
HDSDR as radio 1. The frequencies are correct but the mode is reversed on
RX via HDSADR. TS 2000 settings as you describe as well. The interesting
thing is that if I use DDE from SatPC32 to drive the FCDP+ and HDSDR, the
modes are correct. Of course, I can't select a frequency on the computer
and have that drive SatPC32 so unless someone has other ideas, your
suggestion might be a workable solution. Just to remember not to use that
one when doing the FT847 by itself :)
An additional funny thing though, On most satellites, I have several
Doppler.sqf entries with slightly different frequencies and maybe an offset
correction. If I select the last entry while controlling HDSDR, even if the
modes on this last line of Doppler.SQF are the correct sidebands, HDSDR
changes to FM. Very odd.
I did also look at the nice paper written by Stephen, N9IP which confirmed
that I was doing everything right.
Tom, N5HYP
-----Original Message-----
From: Erich Eichmann [mailto:erich.eichmann@xxxxxxxx.xxx
Sent: Thursday, July 13, 2017 3:09 PM
To: Tom Schuessler; AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] SatPC32 and HDSDR
Tom,
I tested that with the FCDP+ as Radio 1 and the FT-847 as Radio 2. I added
an additional line for FO-29 to Doppler.SQF with reverse SSB modes
(downlink LSB, uplink USB). When I switched between the data lines (menu
CAT) the modes changed in HDSDR and at the FT-847.
Settings:
Radio 1: Kenwood, TS-2000, baudrate 57600, same baudrate in HDSDR, CAT delay
50.
Radio 2: Yaesu FT-847, baudrate 57600
All options in menu Radio Setup unchecked.
73s, Erich, DK1TB
Am 13.07.2017 um 06:28 schrieb Tom Schuessler:
> All,
>
> A quick question on using SatPC32 to control HDSDR. I have a FCDP+
> and can control it via CAT via virtual Serial Port Emulator software.
> I seem to have some success using the Kenwood TS 2000 settings for Rig
> for this software/device. Problem is that when I select a Doppler.SQF
> line in the CAT dialog, HDSDR changes to the wrong SSB mode. I have
> to manually change it to USB on HDSDR. FM works fine, but SSB modes
> start out wrong. Is there a better radio emulation to use than the TS
2000?
>
> Also, If I want to use the HDSDR/FCDP+ as the RX and my FT847 as TX,
> which radio should best be radio 1 and which should be 2?
>
> Thanks much.
>
> Tom Schuessler
> N5HYP
>
>
------------------------------
Message: 6
Date: Mon, 17 Jul 2017 07:53:20 -0400
From: Bill Booth <ve3nxk@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Test Message Update
Message-ID: <596CA530.3070103@xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
On 2017-07-16 9:56 PM, Steve Appleton wrote:
> ISP had amsat.org as a blocked domain
My old provider did this about 2 or 3 times a year, very frustrating. In
the end
I switched providers.
--
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: 7
Date: Mon, 17 Jul 2017 03:37:49 +0000
From: Christopher Bradley <christopherrbradley@xxxxxxx.xxx>
To: "AMSAT-bb@xxxxx.xxxx <AMSAT-bb@xxxxx.xxx>
Subject: [amsat-bb] ANS 197
Message-ID:
<BLUPR18MB0145DE435D417CF90BD0B9CAAFA00@xxxxxxxxxxxxx.xxxxxxxx.xxxx.xxxxxxx.xx
x>
Content-Type: text/plain; charset="Windows-1252"
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:
* ARISS Celebrates it?s 20th Anniversary through SSTV Event
* 3U CubeSat with FM Transponder Launch Planned for August 16
* International Space Station school contact
* NEON - NASA Educators Online Network
* Tour de France Special Event Station Includes Satellite Operation
* Satellite Shorts From All Over
SB SAT @ AMSAT $ANS-197.01
ANS-197 AMSAT News Service Weekly Bulletins
AMSAT News Service Bulletin 197.01
>From AMSAT HQ KENSINGTON, MD.
July 16, 2017
To All RADIO AMATEURS
BID: $ANS-197.01
ARISS Celebrates it?s 20th Anniversary through SSTV Event
In commemoration of the 20th Anniversary of ARISS, a Slow Scan
Television (SSTV) event is planned for Thursday, July 20 starting
around 21:25 UTC. The event plans to feature images from ARISS
activities both past and present. This opportunity should cover most
of the world during the operation period.
The event plans to use a computer on the ISS Russian Segment, which
stores images that are then transmitted to Earth using the ham radio,
specifically the onboard Kenwood TM D710 transceiver. Those receiving
the images can post them at https://ariss-sstv.blogspot.com/ for
viewing by the public.
The 20 year history of ARISS will be displayed through a collection
of 12 unique images sharing the amazing accomplishments of ARISS over
the last two decades. SSTV signals will be sent to earth at 145.80
MHz using FM. The SSTV mode of transmission is expected to be PD 120
(PD 180 may be a second option). The event is expected to continue
over a two day period.
Since it?s inception, Amateur Radio on the International Space
Station (ARISS) has provided students an opportunity, through ham
radio, to engage in conversation with orbiting astronauts and
inspired many to seek careers in science, technology, engineering and
math. Consider how you might inspire students in your area through
this chance to capture images directly from space to their
computers.
Please note that the event, and any ARISS event, is dependent on
other activities, schedules and crew responsibilities on the ISS and
are subject to change at any time.
While preparations are being finalized please check for new and the
most current information on the AMSAT.org and ARISS.org websites, the
AMSAT-BB@xxxxx.xxxx the ARISS facebook at Amateur Radio On The
International Space Station (ARISS) and ARISS twitter @xxxxxxxxxxxx
for the latest information on this event.
[ANS thanks ARISS for the above information]
---------------------------------------------------------------------
3U CubeSat with FM Transponder Launch Planned for August 16
A 3U CubeSt, FMN-1, is planned for launch on August 16 from China's
Jiuquan Satellite Launch Center located in the Gobi desert, Inner
Mongolia.
FMN-1 will fly an FM repeater:
Uplink: 145.945 MHz FM
Downlink: 435.350 MHz FM (plus telemetry)
A 9k6 BPSK AX25 UHF downlink with an FM uplink on VHF is included.
The main mission of the satellite includes a new component experiment
and deployable solar panels.
IARU coordination information is posted at:
http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=567
[ANS thanks the IARU for the above information]
---------------------------------------------------------------------
An International Space Station school contact has been planned with
participants at ISS R&D conference, Washington, D.C. on 20 July. The
event is scheduled to begin at approximately 13:23 UTC. It is
recommended that you start listening approximately 10 minutes before
this time. The duration of the contact is approximately 9 minutes and
30 seconds. The contact will be a telebridge between NA1SS and W6SRJ.
The contact should be audible over the west coast of the U.S.
Interested parties are invited to listen in on the 145.80 MHz
downlink.
The contact is expected to be conducted in English.
This ARISS contact will be conducted with Youth in Aviation Program
students from the East Coast Chapter, Tuskegee Airmen, Inc.
(ECCTAI) attending the ISS Research and Development conference
as part of the conference's STEM day. ECCTAI is one of the largest
Tuskegee Airmen, Inc. chapters in United States and serves the
Washington DC area. ECCTAI is dedicated to keeping alive the
history, achievements, and importance of the original Tuskegee
Airmen.
The term, "Tuskegee Airmen," refers to the men and women, who were
involved in the so-called "Tuskegee Experience", the World War II
Army Air Corps program to train African Americans to fly and maintain
combat aircraft.
ECCTAI strives to increase understanding of the
"Tuskegee Experience" by honoring the accomplishments and
perpetuating
the history of the men and women who participated in the
"Tuskegee Experience" and to introduce young people to the world of
aviation and space through its Youth in Aviation Program (YIAP).
YIAP motivates and inspires America's youth to strive for similar
excellence of these earlier pioneers, exposing them to aviation and
space careers (Level I), attending FAA ground school (Level II) and
receiving aircraft flight instruction or interning at an FAA
certified
A&P (Airframe and Powerplant) facility (Level III).
[ANS thanks ARISS for the above information]
---------------------------------------------------------------------
NEON - NASA Educators Online Network ANNOUNCEMENTS
Free STEM Education Webinars From NASA Educator Professional
Development
The NASA STEM Educator Professional Development Collaborative (EPDC)
at Texas State University is presenting a series of free webinars
open to all educators. Join NASA education specialists to learn about
activities, lesson plans, educator guides and resources that bring
NASA into your classroom. Registration is required to participate.
To register, simply click on the link provided beneath the webinar
description.
July 17, 2017, at 6:30 p.m. ET: Solar Eclipse: Edible Experiments/
The Great American Eclipse / Eclipse Book Reviews (Grades K-12) --
Explore resources for making edible models to teach about lunar and
solar eclipses. Browse websites with hands-on activities on subjects
such as protection from UV rays. Learn about a collection of
children's
literature to use for studying the eclipse. These activities will be
great for summer camps and back-to-school events before the solar
eclipse
on Aug. 21, 2017. Register online to participate.
https://www.eiseverywhere.com/263976
July 18, 2017, at 6:30 p.m. ET: Solar Eclipse: Guest Scientist --
High-Altitude Ballooning (Grades K-12) -- Get an overview of high-
altitude
ballooning during eclipses with Bernhard Beck-Winchatz from the
STEM Studies Department at DePaul University in Chicago, Illinois.
Beck-Winchatz has worked on several NASA projects using weather
balloon
flights that provide affordable access to a spacelike environment
for student research. Register online to participate.
https://www.eiseverywhere.com/263980
July 19, 2017, at 6:30 p.m. ET: Solar Eclipse: Building Your
Own Eclipse Equipment for Your Classroom on a Budget (Grades K-12) --
Learn how to build inexpensive models to teach solar eclipse concepts
in the classroom. Register online to participate.
https://www.eiseverywhere.com/263974
July 20, 2017, at 6:00 p.m. ET: Solar Eclipse: What, When, Where, How
and Safety (Grades K-12) -- On Aug. 21, 2017, most Americans will
experience
their first total solar eclipse in almost 40 years. What is a solar
eclipse?
Where will the eclipse be visible? When will the eclipse occur? How
can the
eclipse be viewed safely? This webinar will explore these questions
using some of the many NASA resources and classroom lessons
supporting
this solar event. Learn about the important safety of properly
viewing
the eclipse with your students. Register online to participate.
https://www.etouches.com/263468
For the NASA STEM Educator Professional Development webinar schedule,
go to: http://www.txstate-epdc.net/events/
---------------------------------------------------------------------
Tour de France Special Event Station Includes Satellite Operation
F, France: TM24TDF is a special event call operating around the Tour
de France 2017. QRV until July 21 on HF and via satellites. QSL via
F6KHS (d/B).
[ANS thanks DX Newsletter DXNL 2049 - July 12, 2017 for the above
information]
---------------------------------------------------------------------
Satellite Shorts From All Over
+ AMSAT Journal Needs Your Words and Wisdom
The AMSAT Journal is looking for interesting articles, experiences
and photos to share with other AMSAT members. Writing for the
Journal is an exellent way both to give back to the AMSAT community
and to help others learn and grow in this most fascinating aspect
of the amateur radio avocation.
Author deadlines for upcoming Journals through 2017 include:
Sept/Oct Edition September 15
Nov/Dec Edition November 15
Send your manuscripts and photos, or story ideas to:
journal (at) amsat.org
For more information visit:
https://www.amsat.org/how-to-write-for-the-amsat-journal/
[ANS thanks Joe KB6IGK for the above information]
+ Need to contact AMSAT-NA?
AMSAT-NA
10605 Concord St, #304
Kensington, MD 20895-2526 USA
Toll-Free: +1 (888) 322-6728
Phone: +1 (301) 822-4376
Fax: +1 (301) 822-4371
info@xxxxx.xxx
[ANS thanks AMSAT-NA for the above information]
+ For information on AMSAT and AMSAT-Related Nets visit:
https://www.amsat.org/amsat-and-amsat-related-nets/
[ANS thanks AMSAT-NA for the above information]
+ AMSAT Symposium
AMSAT NA announces that the 2017 AMSAT Space Symposium will be
held on Friday through Sunday, Oct 27, 28, 29, 2017 in Reno,
Nevada. Location will be at the Silver Legacy Resort , 407 N
Virginia Street, in Downtown, Reno.
For more information visit:
https://www.amsat.org/amsat-symposium/
With less than four months left for Symposium, now is the time
to start writing your papers and preparing your presentations.
[ANS thanks the Symposium Committee for the above information.
---------------------------------------------------------------------
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,
Christopher Bradley, KG5JUP
kg5jup at amsat dot org
------------------------------
Message: 8
Date: Mon, 17 Jul 2017 11:43:58 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Narrowband tuning of DCI filters?
Message-ID: <1adf2b54537fcedc11bc2c61730da629@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
The DCI brand of interdigital bandpass filters are neat for cleaning up
reception by blocking out of band Intermod sources etc. But they are too
board for any effect on in band signals.
Has anyone re-tuned the cavities to all the same frequency to see how well
the filter performs as a narrowband filter?
Bob, WB4APR
------------------------------
Message: 9
Date: Mon, 17 Jul 2017 19:01:20 -0400
From: Norm n3ykf <normanlizeth@xxxxx.xxx>
To: Robert Bruninga <bruninga@xxxx.xxx>
Cc: "<,amsat-bb@xxxxx.xxxxxxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Narrowband tuning of DCI filters?
Message-ID:
<CAJUhCTOyS=AXA3+Zy1Dr1OrzLb+B4GuN7iA7c5Wj8UaqA_1YKA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Based on my testing (with a Times technologies T-100), field trial and
my (book) reading, the four pole filter will work as a bandpass
filter. It does not have the steep skirts that a resonant cavity
possesses. It will, however do some things one cavity will not.
Playing with it showed a mode where there were two pass notches with a
reject between (like the letter "W"). Looked like what would be ideal
for a repeater.
I did use the DCI in a noisy RF environment. Did work. Next trip the
resonant VHF cavity is going, the DCI is staying home. Shaking on the
plane makes the tuning slugs come loose. No fun.
The DCI slugs shook themselves loose on the return trip.
The first and last poles are supposedly to help match (couple?), in and out.
Picked up an elderly (but in cal) Sitemaster a few months ago. If
you're interested in sweeps of the DCI and for comparison, a resonant
cavity, let me know. Much nicer tool than the T-100. (Have a Narda OSL
for field cal.)
Anritsu has lots of quality application notes regarding using it's
gear. Great entertainment.
Norm n3ykf
On Mon, Jul 17, 2017 at 11:43 AM, Robert Bruninga <bruninga@xxxx.xxx> wrote:
> The DCI brand of interdigital bandpass filters are neat for cleaning up
> reception by blocking out of band Intermod sources etc. But they are too
> board for any effect on in band signals.
>
>
>
> Has anyone re-tuned the cavities to all the same frequency to see how well
> the filter performs as a narrowband filter?
>
>
>
> 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: 10
Date: Tue, 18 Jul 2017 14:23:54 +0200
From: Nico Janssen <hamsat@xxxxxx.xx>
To: amsat-bb@xxxxx.xxxx Ray Hoad <ray.hoad@xxxxxxxx.xxx>
Subject: Re: [amsat-bb] Several satellites identified
Message-ID: <e63ba2c7-a0cf-48e7-7a40-6a5842139bb9@xxxxxx.xx>
Content-Type: text/plain; charset=utf-8; format=flowed
All,
With increased separation, doppler measurements now result in the following
identifications:
NUDTSat is object 42787, 2017-036Y
SUCHAI is object 42788, 2017-036Z
Note that Space-Track.org and CelesTrak are currently not correct but they
are informed and hopefully will update soon.
73,
Nico PA0DLO
On 08-07-17 12:56, Nico Janssen wrote:
> All,
>
> Further doppler measurements have resulted in the following
> identifications:
>
> Aalto 1 is object 42775, 2017-036L
> URSA MAIOR is object 42776, 2017-036M
> Pegasus is object 42784, 2017-036V
> Robusta 1B is object 42792, 2017-036AD
> D-SAT is object 42794, 2017-036AF
>
> UCLSat and skCUBE are objects 42789 and 42796. But the separation between
> these objects is so small that it is not yet possible to determine
> which satellite
> is which object.
> NUDTSat is either object 42787 or object 42788. Again the separation
> between
> these objects is too smal to be able to determine which one it is.
>
> 73,
> Nico PA0DLO
>
> On 30-06-17 15:32, Nico Janssen wrote:
>> All,
>>
>> Detailed doppler measurements result in the following identifications:
>>
>> LituanicaSat is object 42768, 2017-036D
>> InflateSail is object 42770, 2017-036F
>> Max Valier Sat is object 42778, 2017-036P
>> VZLUsat is object 42790, 2017-036AB.
>>
>> 73,
>> Nico PA0DLO
>>
>>
>>
>
> _______________________________________________
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------------------------------
Message: 11
Date: Tue, 18 Jul 2017 09:42:45 -0500
From: Joe <nss@xxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Russian Thing
Message-ID: <1a8cc1aa-9569-bb21-742a-9762e8fa05d8@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
While not really a Com bird, it still me be interesting to spot.
Does anyone know of a tracking site for this?
http://www.iflscience.com/space/russian-scientists-just-launched-a-controversi
al-artificial-star-that-might-anger-astronomers/all/
Joe WB9SBD
--
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
------------------------------
Message: 12
Date: Tue, 18 Jul 2017 09:50:33 -0500
From: JoAnne K9JKM <k9jkm@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Russian Thing
Message-ID: <2a82b441-db47-5c04-71d9-b1c4910393d4@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Joe,
Heavens-Above.com now has pass predictions up for the new Russian
reflector sat "Mayak," listing it as NORAD ID 2017-042F/42830.
http://www.heavens-above.com/PassSummary.aspx?satid=42830
(that's the page but no predictions were actually listed the last time
I checked it.)
Plus Mayak has its own app, available to those who back the project.
See: http://cosmomayak.com/default#mobileapp
On 7/18/2017 9:42 AM, Joe wrote:
> While not really a Com bird, it still me be interesting to spot.
> Does anyone know of a tracking site for this?
>
>
http://www.iflscience.com/space/russian-scientists-just-launched-a-controversi
al-artificial-star-that-might-anger-astronomers/all/
>
>
> Joe WB9SBD
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
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
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End of AMSAT-BB Digest, Vol 12, Issue 176
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