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CX2SA > SATDIG 08.11.16 13:47l 922 Lines 31691 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Upcoming ARISS contact with Boca Raton Christian School, Boca
Raton FL (n4csitwo@xxxxxxxxx.xxxx
2. ARRL Teacher's Institute/STE(A)M (Philip Jenkins)
3. ANS-311 AMSAT News Service Weekly Bulletins (Lee McLamb)
4. Coax Assemblies for Arrow Antenna 437 X 14 (David Mennerich)
5. Re: Coax Assemblies for Arrow Antenna 437 X 14 (Jeff)
6. Fox Telem MAC Install issue... (Chad Phillips)
7. Day/Night SNR above 1GHz?? (Scott)
8. Re: Day/Night SNR above 1GHz?? (Dani EA4GPZ)
9. Wi9i IN the DOMINICAN REPUBLIC (jeffory broughton)
10. Signal every 3 khz on FO 29 this morning (jeffory broughton)
11. Office Closed (Martha)
12. HTV6 to ISS (Mineo Wakita)
----------------------------------------------------------------------
Message: 1
Date: Sat, 5 Nov 2016 10:45:53 -0400
From: <n4csitwo@xxxxxxxxx.xxx>
To: <ariss-press@xxxxx.xxx>, "amsat-edu" <amsat-edu@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Upcoming ARISS contact with Boca Raton Christian
School, Boca Raton FL
Message-ID: <E39BC94B29674370856A6331C0204B32@xxx>
Content-Type: text/plain; charset="iso-8859-1"
An International Space Station school contact has been planned with
participants at Boca Raton Christian School, Boca Raton FL on 07 Nov. The
event is scheduled to begin at approximately 17:15 UTC. The duration of the
contact is approximately 9 minutes and 30 seconds. The contact will be
direct between NA1SS and N4BRF. The contact should be audible over the state
of Florida and adjacent areas. Interested parties are invited to listen in
on the 145.80 MHz downlink. The contact is expected to be conducted in
English.
Boca Raton Christian School is a faith-based school distinguished by its
academic excellence, spiritual formation, and caring environment. BRCS
serves approximately 570 students in grades PreK-12. The campus is situated
on approximately 22 acres in downtown Boca Raton, FL. Founded in 1973 as a
ministry of Boca Raton Community Church, the school is accredited by several
educational institutions and has been recognized twice as a National Blue
Ribbon School. The college preparatory high school features a one-to-one
laptop program as well as superior fine arts and athletic programs. All BRCS
students participate in community service: grades K through 8 are involved
in local projects, and high school students spend a week serving underserved
communities in Tennessee, Arizona, and Costa Rica.
Participants will ask as many of the following questions as time allows:
1. Did you have any childhood experiences that made you want to become an
astronaut?
2. How did you prepare to become an astronaut?
3. Has anything happened that you weren't prepared for and how did you
handle it?
4. Does time feel like it goes slower or faster on the space station than on
Earth and why?
5. Judging from the current rate of technology advancements, what do you see
the future of space travel in the next 20 - 30 years?
6. Can you see meteors in space?
7. Have you or anyone you know experienced negative effects from radiation
while in space?
8. What is the most incredible experience you've had in space?
9. What is the worst illness you or someone you know has had in space and
how was it handled?
10. How much free time do you have and what do you like to do?
11. Since there are both men and women and from different countries, what
kinds of interpersonal conflicts are there and how do they handle them?
12. How has your life changed since becoming an astronaut?
13. Should we colonize Mars? If so, what approach would you recommend, and
would you be willing to be a colonist?
14. How do you fly your spaceship?
15. What do you like and dislike most about being an astronaut?
16. Has your ISS ever broken down, and how did you fix it?
17. Have you ever seen anything in space that you couldn't explain?
18. Do you play games in space, and, if so, what games do you play?
19. Has being in space changed your perspective on the world. If so, how?
20. Have you or anyone you know ever had a near death experience in space
(other than illness), and, if so, what happened?
PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES:
Visit ARISS on Facebook. We can be found at Amateur Radio on the
International Space Station (ARISS).
To receive our Twitter updates, follow @xxxxxxxxxxxx
Next planned event(s):
TBD
About ARISS:
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies that
support the International Space Station (ISS). In the United States,
sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American
Radio Relay League (ARRL), the Center for the Advancement of Science in
Space (CASIS) and National Aeronautics and Space Administration (NASA).
The primary goal of ARISS is to promote exploration of science, technology,
engineering, and mathematics (STEM) topics by organizing scheduled contacts
via amateur radio between crew members aboard the ISS and students in
classrooms or informal education venues. With the help of experienced
amateur radio volunteers, ISS crews speak directly with large audiences in a
variety of public forums. Before and during these radio contacts, students,
teachers, parents, and communities learn about space, space technologies,
and amateur radio. For more
information, see www.ariss.org, www.amsat.org, and www.arrl.org.
Thank you & 73,
David - AA4KN
---
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------------------------------
Message: 2
Date: Sat, 5 Nov 2016 10:51:20 -0400
From: Philip Jenkins <n4hf.philip@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARRL Teacher's Institute/STE(A)M
Message-ID:
<CAGdEbNZ_bXLqehbzk73K_wF+igNoR5MQ3Ecmeo9c-xw_fea+Og@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
One of my high school classmates, Teresa, is a former middle school math
and science teacher. Teresa has now transitioned to being a staff member of
North Carolina State University's Science House. While STEM is not the main
focus of her position, she still does a lot of hand-on experiences in STEM
areas, some for students and some for educators, here in western NC.
I made her aware last month of the ARRL Teacher's Institute. which she is
placing into her November newsletter. (I included links to the institute on
ARRL's website.) This newsletter reaches at least 1350 points of contact,
mainly STEM educators, most of them in NC. I offered to be a point of
contact if anyone was interested in learning more about the ARRL program,
and especially AMSAT/ARISS, as I am an ARRL PIO (Public Information
Officer).
So I'm asking for videos, websites, (videos/reports of) demonstrations,
etc, which are relevant for STEM educators, especially as it involves ham
radio, AMSAT, and ARISS so that I can pass these various references along
to folks who might have seen Teresa's newsletter.
I haven't heard from anyone YET, but the month is still young. I'm hoping
there will be a few nibbles for the ARRL Institute at least, as I stressed
to Teresa that it is virtually cost-free for the participants.
Thanks in advance!
Philip N4HF (N4HF@xxxxx.xxxx
------------------------------
Message: 3
Date: Sat, 5 Nov 2016 22:13:17 -0400
From: Lee McLamb <ku4os@xxx.xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ANS-311 AMSAT News Service Weekly Bulletins
Message-ID: <9068ae46-6482-c9cb-0baf-7101c553be78@xxx.xx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
AMSAT NEWS SERVICE
ANS-311
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:
* AMSAT Symposium Cruise Port Call Changed
* ARISS Packet Active on 437.550 MHz
* Upcoming ARISS contact with Boca Raton Christian School, Boca Raton FL
* US Naval Academy Students Plan HF Transponder Satellite
* UBAKUSAT 3U Linear Transponder CubeSat
* NASA CubeSat Launch Opportunity
* Free Program -- Cubes in SpaceTM
SB SAT @ AMSAT $ANS-311.01
ANS-311 AMSAT News Service Weekly Bulletins
AMSAT News Service Bulletin 311.01
From AMSAT HQ KENSINGTON, MD.
DATE November 6, 2016
To All RADIO AMATEURS
BID: $ANS-311.01
AMSAT Symposium Cruise Port Call Changed
The 2016 AMSAT Space Symposium will be held aboard a commercial cruise ship
departing from the port of Galveston, Texas. Sail dates are November 10-14
aboard the Carnival Liberty. Galveston is conveniently located near
Houston,
Texas with access from both the George Bush Intercontinental Airport
(IAH) and
the Houston Hobby Airport (HOU.)
AMSAT has been notified that due to a technical issue with Carnival
Liberty which
only affects the ship;s maximum cruise speed, the arrival and departure
times
as well as scheduled itinerary have been modified. This cruise will
embark on
Thursday evening, 19:00-22:00 CST and return on the following Monday
morning at
10:00 CST. The trip includes two full days at sea and one day in port at
Progreso, Mexico. Symposium presentations and meetings will be
conducted during
the days at sea to allow free time during the stop while in port. The AMSAT
Board of Directors meeting will occur on shore at the DoubleTree by Hilton
Galveston Beach, Galveston, Texas, November 9-10.
[ANS thanks Carnival Cruise Lines for the above information]
---------------------------------------------------------------------
ARISS Packet Active on 437.550 MHz
N5VHO reported via Twitter (#ARISS, #hamradio) that the ISS packet system
now operational on UHF (437.550 MHz). See also:
http://www.issfanclub.com/node/41955
[ANS thanks Kenneth, N5VHO, for the above information]
---------------------------------------------------------------------
Upcoming ARISS contact with Boca Raton Christian School, Boca Raton FL
An International Space Station school contact has been planned with
participants
at Boca Raton Christian School, Boca Raton FL on 07 Nov. The event is
scheduled
to begin at approximately 17:15 UTC. The duration of the contact is
approximately 9 minutes and 30 seconds. The contact will be direct
between NA1SS
and N4BRF. The contact should be audible over the state of Florida and
adjacent
areas. Interested parties are invited to listen in on the 145.80 MHz
downlink.
The contact is expected to be conducted in English.
Boca Raton Christian School is a faith-based school distinguished by its
academic excellence, spiritual formation, and caring environment. BRCS
serves
approximately 570 students in grades PreK-12. The campus is situated on
approximately 22 acres in downtown Boca Raton, FL. Founded in 1973 as a
ministry
of Boca Raton Community Church, the school is accredited by several
educational
institutions and has been recognized twice as a National Blue Ribbon
School. The
college preparatory high school features a one-to-one laptop program as
well as
superior fine arts and athletic programs. All BRCS students participate in
community service: grades K through 8 are involved in local projects,
and high
school students spend a week serving under-served communities in Tennessee,
Arizona, and Costa Rica.
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies
that
support the International Space Station (ISS). In the United States,
sponsors
are the Radio Amateur Satellite Corporation (AMSAT), the American Radio
Relay
League (ARRL), the Center for the Advancement of Science in Space
(CASIS) and
National Aeronautics and Space Administration (NASA). The primary goal
of ARISS
is to promote exploration of science, technology, engineering, and
mathematics
(STEM) topics by organizing scheduled contacts via amateur radio between
crew
members aboard the ISS and students in classrooms or informal education
venues.
With the help of experienced amateur radio volunteers, ISS crews speak
directly
with large audiences in a variety of public forums. Before and during
these
radio contacts, students, teachers, parents, and communities learn about
space,
space technologies, and amateur radio. For more information, see
www.ariss.org,
www.amsat.org, and www.arrl.org.
[ANS thanks David, AA4KN, for the above information]
---------------------------------------------------------------------
US Naval Academy Students Plan HF Transponder Satellite
AMSAT-UK reported the US Naval Academy HFSAT received IARU frequency
coordination on October 27, 2016. This is a 1.5U CubeSat with a 15 meter to
10 meter linear transponder. The #HFsat 21.4 to 29.42 MHz inverting
transponder will have a bandwidth of 30 kHz. The satellite will also carry
an APRS digipeater on 145.825 MHz. crossed 1/4 wave whips on VHF and also a
10 meter dipole. No launch has yet been identified.
IARU Coordination:
http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=528
US Naval Academy page: http://aprs.org/hfsat.html
[Thanks to IARU and US Naval Academy]
---------------------------------------------------------------------
UBAKUSAT 3U Linear Transponder CubeSat
Turkey?s 3U CubeSat UBAKUSAT carrying an amateur radio 145/435 MHz SSB/CW
transponder is planned to be deployed from the ISS in 2017.
The linear transponder is almost the same as that on the TURKSAT-3USAT
which was
launched on April 26, 2013.
The satellite is being developed by Istanbul Technical University,
Faculty of
Aeronautics and Astronautics, Space Systems Design and Test Lab (SSDTL)
along
with TAMSAT, GUMUSH and ERTEK Ltd, with some support of the RF lab of
ITU (RFL)
and Ministry of Transportation, Communication and Maritime in
collaboration with
the Japanese Government.
The primary mission of UBAKUSAT is to provide voice communications for
amateur
radio stations around the globe. Additionally the satellite will carry the
TAMSAT Simplesat card which will send telemetry data, including the
relative
radiation data absorbed by the card, to ground stations. There is also a CW
beacon.
The estimated duration of the satellite mission is about 6 to 12 months
before
re-entry. The launch from Japan to the International Space Station is
planned
for late 2016 or early 2017 and deployment from the ISS will occur sometime
later.
IARU coordinated frequencies:
? 437.225 MHz CW Beacon
? 437.325 MHz Telemetry
? SSB/CW transponder:
? 145.940-145.990MHz
? 435.200-435.250 MHz
IARU satellite frequency coordination pages http://www.amsat.org.uk/iaru/
Turkish Amateur Satellite Technologies Organization (TAMSAT)
http://tinyurl.com/TurkeyTAMSAT
[ANS thanks AMSAT-UK for the above information]
---------------------------------------------------------------------
NASA CubeSat Launch Opportunity
NASA has opened the next round of its CubeSat Launch Initiative in an
effort to
engage the growing community of space enthusiasts who can contribute to
NASA's
space exploration goals.
The CubeSat Launch Initiative gives students, teachers and faculty a
chance to
get hands-on flight hardware development experience in the process of
designing,
building and operating small research satellites. It also provides a
low-cost
pathway to space for research in the areas of science, exploration,
technology
development, education or operations consistent with NASA's Strategic Plan.
Applicants must submit their proposals electronically by 4:30 p.m. EST,
Nov. 22,
2016. NASA will choose the payloads by Feb. 17, 2017, but initial
selection does
not guarantee a launch opportunity. Certain selected experiments are
slated to
be flown as auxiliary payloads on agency rocket launches or to be
deployed from
the International Space Station beginning in 2017 and running through
2020. NASA
does not fund the development of the small satellites, and this
opportunity is
open only to U.S. nonprofit organizations and U.S. accredited educational
organizations.
One goal of the CubeSat Launch Initiative is to extend the successes of
space
exploration to all 50 states by launching a small satellite from at
least one
participant in each state in the next five years. During this round,
NASA is
particularly focused on gaining participation in the District of Columbia,
Puerto Rico and 18 states not previously selected for the CubeSat Launch
Initiative. These states are Arkansas, Delaware, Georgia, Iowa, Kansas,
Maine,
Minnesota, Mississippi, Nebraska, Nevada, New Hampshire, North Carolina,
Oklahoma, Oregon, South Carolina, South Dakota, Washington and Wyoming.
CubeSats are in a class of research spacecraft called nanosatellites.
The base
CubeSat dimensions are about 4 inches by 4 inches by 4 inches (10
centimeters by
10 centimeters by 11 centimeters), which equals one "cube," or 1U. CubeSats
supported by this launch effort include volumes of 1U, 2U, 3U and 6U.
CubeSats
of 1U, 2U and 3U size typically have a mass of about three pounds (1.33
kilograms) per 1U Cube. A 6U CubeSat typically has a mass of about 26.5
pounds
(12 kilograms). The CubeSat's final mass depends on which deployment
method is
selected.
To date, NASA has selected 119 CubeSat missions from 66 unique
organizations. Of
those missions, 46 have been launched into space with 29 more CubeSats
scheduled
to go in the next 12 months.
For additional information about NASA's CubeSat Launch Initiative
program, visit
http://go.nasa.gov/CubeSat_initiative.
Questions about this opportunity should be directed to Jason Crusan at
Jason.Crusan@xxxx.xxx.
[ANS thanks the NASA Education Express Message -- Nov. 3, 2016 for the
above
information]
---------------------------------------------------------------------
Free Program -- Cubes in SpaceTM
Cubes in SpaceT provides students ages 11-18 an opportunity to design and
compete to launch an experiment into space at no cost! Cubes in SpaceT is
offered by idoodledu, inc., in partnership with NASA's Goddard Space Flight
Center's Wallops Flight Facility, the Colorado Space Grant Consortium and
NASA's Langley Research Center.
This global education program based on STEAM (science, technology,
engineering, arts and mathematics) enables students to learn about space
exploration using innovative problem-solving and inquiry-based learning
methods. Participants have access to resources that help prepare them to
design and develop an experiment to be integrated into a small cube.
This year, experiments will be launched into space via sounding rocket from
NASA's Wallops Flight Facility on Wallops Island, Virginia, in late June
2017 or from a high-altitude balloon launched from NASA's Columbia
Scientific Balloon Facility in Fort Sumner, New Mexico, in August 2017.
The deadline for program registration is Jan. 6, 2017. For more
information,
visit http://www.cubesinspace.com. Questions about this program may be
directed to info@xxxxxxxxxxxx.xxx.
About idoodedu inc.
idoodledu inc., a charitable nonprofit 501(c)(3) organization, is a wholly
owned subsidiary of idoodlelearning inc., and was created in 2015 as a
legal
vehicle to bring public/private partnerships and publicly funded
programs to
all learners and educators. idoodlelearning inc. is an education company
based in Ottawa, Canada; London, England; and Virginia Beach, Virginia,
USA.
[ANS thanks the NASA Education Express Message -- Nov. 3, 2016 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,
Lee McLamb, KU4OS
ku4os at amsat dot org
------------------------------
Message: 4
Date: Sun, 6 Nov 2016 06:23:10 -0500
From: David Mennerich <david.n2teb@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Coax Assemblies for Arrow Antenna 437 X 14
Message-ID:
<CABYNC=YtGZHGZy3j_xTqub2YABJOd1EWnv3BGNC=TC+pmo-GCA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello - does anyone know if there are coaxial cable assemblies commercially
available for the Arrow 437 X 14 to make it circular polarization? It so,
seems like a fairly inexpensive way to get a circularly polarized antenna
for satellite work. I'm looking for smaller circularly polarized antennas
that could be used in my portable LEO SSB satellite setup.
http://www.arrowantennas.com/arrowii/437x14ii.html
Thanks,
Dave N2TEB
------------------------------
Message: 5
Date: Sun, 6 Nov 2016 08:34:17 -0500
From: "Jeff" <kb2m@xxxxxxx.xxx>
To: "David Mennerich" <david.n2teb@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Coax Assemblies for Arrow Antenna 437 X 14
Message-ID: <76914D4606874E7A92181152BB620592@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I built a manual phasing harness for the Arrow 70cm cross Yagi back in the
AO-40 days. After a quick search I found my old QSL.net webpage. Everything
you need to make your own phasing harness is here. Read the stuff along the
left side..
http://www.qsl.net/kb2m/index.html
Here is a thread from 2007 about this subject...
http://www.amsat.org/amsat/archive/amsat-bb/200712/msg00021.html
73 Jeff kb2m
-----Original Message-----
From: David Mennerich
Sent: Sunday, November 06, 2016 6:23 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Coax Assemblies for Arrow Antenna 437 X 14
Hello - does anyone know if there are coaxial cable assemblies commercially
available for the Arrow 437 X 14 to make it circular polarization? It so,
seems like a fairly inexpensive way to get a circularly polarized antenna
for satellite work. I'm looking for smaller circularly polarized antennas
that could be used in my portable LEO SSB satellite setup.
http://www.arrowantennas.com/arrowii/437x14ii.html
Thanks,
Dave N2TEB
------------------------------
Message: 6
Date: Sun, 6 Nov 2016 20:27:50 -0600
From: Chad Phillips <chad.kg0mw@xxxxx.xxx>
To: Kevin M via Amsat-Bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Fox Telem MAC Install issue...
Message-ID: <E43E47D9-FDC9-4F96-8B6B-CCC0FB2B2F82@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I am trying to install the FoxTelem software on my mac. I have the latest
version of java installed, latest version of OS X. I hold down the cmd key
when trying to open the install file, yet it says the file is corrupt. Any
ideas?
Thanks,
Chad
kg0mw
------------------------------
Message: 7
Date: Mon, 7 Nov 2016 00:43:30 -0500
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Day/Night SNR above 1GHz??
Message-ID: <19A5BA826CA2495388DC5E91981796A2@xxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Hello everyone!
With talk of some of the future amateur satellites using higher and higher
frequencies, I can assure you that I for one am going to have a lot of
questions about the world above 1GHz.
Since I have been taking baby steps by monitoring L-Band with some success,
a pattern has become so regular that I wonder if it will be applicable
if/when I am ever equipped to work next generation AmSats in the GHz range.
I have noticed (quite reliably) that the quality of my received signal
easily doubles at night. One example would be the Outernet data stream from
Inmarsat 4-F3. The SNR value reported by the Outernet software might be in
the area of ?6- during the day, but often jumps to ?11- or ?12- (or even
higher) at night.
Is this normal? Should I generally expect to have significantly better
performance above 1GHz at night (at least in the case of ground-to-space
contacts)?
If so, of course that would be nice to know before trying to work nextgen
satellites on those higher frequencies.
Thanks!
-Scott, K4KDR
Montpelier, VA USA
------------------------------
Message: 8
Date: Mon, 7 Nov 2016 11:16:59 +0100
From: Dani EA4GPZ <daniel@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Day/Night SNR above 1GHz??
Message-ID: <a16d07ef-4a04-220c-0d6c-f8080ff42fd6@xxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
El 07/11/16 a las 06:43, Scott escribi?:
> Hello everyone!
>
> With talk of some of the future amateur satellites using higher and
> higher frequencies, I can assure you that I for one am going to have
> a lot of questions about the world above 1GHz.
>
> Since I have been taking baby steps by monitoring L-Band with some
> success, a pattern has become so regular that I wonder if it will be
> applicable if/when I am ever equipped to work next generation AmSats
> in the GHz range.
>
> I have noticed (quite reliably) that the quality of my received
> signal easily doubles at night. One example would be the Outernet
> data stream from Inmarsat 4-F3. The SNR value reported by the
> Outernet software might be in the area of ?6- during the day, but
> often jumps to ?11- or ?12- (or even higher) at night.
>
> Is this normal? Should I generally expect to have significantly
> better performance above 1GHz at night (at least in the case of
> ground-to-space contacts)?
>
> If so, of course that would be nice to know before trying to work
> nextgen satellites on those higher frequencies.
Hi Scott,
I wouldn't expect that day/night plays any significant role on microwave
propagation.
In fact, propagation effects that do play some role in terrestrial
microwave propagation are much harder to notice for satellite
communications, just because the propagation path through the lower
atmosphere is shorter. For instance, rainscatter is really a thing for
terrestrial microwave, but for satellite it takes a huge storm for one
to notice anything. I managed to obtain some good results on 12GHz
during a big hailstorm:
http://destevez.net/2016/05/hailstorm-in-12ghz/
Have you considered that the difference is not in signal strength but in
background noise level. Maybe you have local QRM from devices that only
run during the day.
The sun is also quite noisy, but you need to point a high gain antenna
towards the sun to notice. Some parts of the Milky Way are also noisy,
but not so much at 1.5GHz.
I would take measurements of both the noise floor and several 1.5GHz
signals during day and night and compare. SDR recordings would be ideal
for this. Take some SDR recordings at day and night during different
days, then do all measurements on the recordings and compare.
73,
Dani.
------------------------------
Message: 9
Date: Mon, 7 Nov 2016 10:35:38 -0500
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Wi9i IN the DOMINICAN REPUBLIC
Message-ID:
<CACm2je39_dKEdWcY65DHt8PRZH0vmUN35mA7KSBHBjk-mgSm0w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
George WI9I , was on FO29 this morning from
His vacation in the Dominican Republic operating half duplex with one 817
and doing a very good job.Copy was rough do to FM activity on the
bird.Listen for him again today. Jeff WB8RJY
jeff broughton
------------------------------
Message: 10
Date: Mon, 7 Nov 2016 17:14:45 -0500
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Signal every 3 khz on FO 29 this morning
Message-ID:
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I swear I read a post somewhere a few days ago where someone heard an un
modulated carrier every 3 khz on FO 29.
But I can not locate that post.I experienced that on FO 29 this morning
along with very strong FM activity using the same uplink frequency as
George WI9I in the Dominican Republic on 145.927.
jeff broughton
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Message: 11
Date: Mon, 7 Nov 2016 17:27:06 -0500
From: Martha <martha@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Office Closed
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<CAPk0USxNMF3XKYxbwrzAgivfsJZhbJf7RH-a7ZgBEJBHEB2zMg@xxxx.xxxxx.xxx>
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The AMSAT Office will be closed from November 8th - November 14th. We will
reopen on Tuesday November 15th.
See you in Galveston!
--
73- Martha
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Message: 12
Date: Tue, 8 Nov 2016 20:22:56 +0900
From: "Mineo Wakita" <ei7m-wkt@xxxxxxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] HTV6 to ISS
Message-ID: <AD6F99C1C18A49F58B4EA7BDA099A41A@xxxxxxx>
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JAXA opened to the public yesterday seven nano satellites to be installed in
H-IIB Transfer Vehicle "KOUNOTORI" (HTV) to be launched next month. Satellites
are only about 1U~3U in size and will conduct experiments aimed at realizing
the
space elevator which is expected to facilitate the movement of Earth and
Universe
in the future. It's the first time to launch in JAXA with seven satellites
at a time.
HTV6 Launch: 13:26 UTC, Dec.9, 2016 at the Tanegashima Space Center, Japan
H-II Transfer Vehicle "KOUNOTORI" (HTV), JAXA
http://global.jaxa.jp/projects/rockets/htv/index.html
AOBA-VeloxIII Kyusyu Institute of Technology
http://aoba2016.blog.fc2.com/
EGG University of Tokyo / Nihon University
http://repository.exst.jaxa.jp/dspace/bitstream/a-is/2961/1/SA6000021010.pdf
FREEDOM Tohoku University / Nakashimada Engneering Works, Ltd
http://www.tohoku.ac.jp/japanese/newimg/pressimg/tohokuuniv-press_20140926_01w
eb.pdf
ITF-2 University of Tsukuba
http://yui.kz.tsukuba.ac.jp/en/
IuPOD Japan Manned Space Systems Corporation
http://www.jamss.co.jp/en/
STARS-C Shizuoka University
http://stars.eng.shizuoka.ac.jp/english.html
WASEDA-SAT3 Waseda University
http://www.miyashita.mmech.waseda.ac.jp/Waseda-Sat3/
Downlink Beacon Mode
AOBA-VeloxIII 437.375 437.375 1k2 AFSK,CW
ITF-2 437.525 437.525 1k2 FM,CW
STARS-C (Mother) 437.405 437.245 1k2 FM,CW
STARS-C (Daughter) 437.425 437.255 1k2 FM,CW
WASEDA-Sat3 437.290 437.290 1k2 PCMFSK,CW
JE9PEL, Mineo Wakita
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End of AMSAT-BB Digest, Vol 11, Issue 359
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