Hi all,
Please, has anyone experience with 9k6 FSK packet operation with FT-991A
transceiver? Let me know your practice, please.
Thank you in advance.
Mirek OK2AQ
--
Tento e-mail byl zkontrolován na viry programem AVG.
http://www.avg.cz
Hi Folks,
We've been asking users to NOT use AO-91 when it is in eclipse. I've
gotten some questions about this, which is great. Here is a bit of info
that is more operational than analytical!
The best way to know if a satellite is in eclipse is to use software. I
use SatPC32 and it shows when a satellite is in sunlight and when it's
in the dark (eclipse). Remember, you can download a demo version
limited only by having to enter your info/lat/long each time you start
the program. Surely many other programs indicate eclipse/sunlight as
well, but since I don't use them, I can't say for sure. Maybe there is
a list somewhere, or maybe we can build a list here! (PREDICT does,
Gpredict probably does, as I would guess Macdoppler as well?) There is
also a program called ILLUM by DK3WN that is really superb for long term
calculations. Others can chime in (please!) if you know of a program
that shows sunlight/eclipse for a satellite.
This is far from perfect, but a good "rule of thumb" for AO-91--if
you're in the continental US/Hawaii, and if it's dark outside, the
satellite is in eclipse so please don't use it during evening passes.
When it's daytime/daylight at your QTH, then AO-91 is in sunlight and
it's OK to use. This appears to hold true for AO-91 pretty much of the
year due to its orbit. If you live at a very northern latitude, things
get more interesting ;)
If a satellite seems to linger along the terminator line (day/night
line), you're really going to need software to tell you!
Thanks for your help and cooperation.
Hope that helps...
73,
--
Mark L. Hammond [N8MH]
AMSAT Director and Command Station
Please note that this ARISS contact with Escuela de educación básica Oswaldo Guayasamín, Puerto Ayora, Santa Cruz Island, Ecuador on January 6 at 17:19 UTC will be live streamed and can be viewed at https://youtu.be/3XmNxHTtR6Q.
ARISS News Release No. 20-28
Dave Jordan, AA4KN
ARISS PR
aa4kn(a)amsat.org
FORIMMEDIATE RELEASE
ARISS ContactScheduled for Students at Escuela de educación básica Oswaldo Guayasamín (Oswaldo Guayasamín School of Basic Education), PuertoAyora, Santa Cruz Island, Ecuador
December 30, 2020—AmateurRadio on the International Space Station (ARISS) has received scheduleconfirmation for an ARISS radio contact with astronauts. ARISS is the groupthat puts together special amateur radio contacts between students around theglobe and crew members with ham radio licenses on the International Space Station (ISS).
This will be a telebridge contact via amateur radio and students will take turnsasking their questions of Victor Glover, amateur radio call sign KI5BKC. John Sygo in Paardekraal, South Africa will use call sign ZS6JON to serve as the ARISS relay amateur radio ground station. English is the language that will beused for this contact. TheRadio Club Argentino will assist the students with the contact. The downlink frequency for this contact is 145.800 MHZ.
The ARISS radio contact isscheduled for January 6, 2021 at 11:19 am GALT (PuertoAyora, Santa Cruz Island), (17:19UTC, 12:19 pm EST, 11:19 am CST, 10:19 am MST and 9:19 am PST).
Staff of OswaldoGuayasamín School of Basic Education in Puerto Ayora, have developed aneducational program (Galapagos Infinito) designed to network with other studentsand schools on the nearby populated Islands of the Galapagos archipelago, about1,000 km off the coast of Ecuador. Galapagos Infinito aims to broaden thestudents’ perspectives by also connecting them with people on a local(Galapagos and across the Pacific Ocean) and international level. This isaccomplished by developing partnerships between the student body/school andvarious organizations, citizen groups, government entities and privatebusinesses. This ARISS contact will serve to enlighten the students on how satellitesand space exploration can help us to better understand the environmentalproblems that exist on earth.
_____________________________
Astime allows, students will ask these questions:
1. What do you feel when you see our planet from space?
2. What did you want to be when you were 12 years old?
3. How do your work in space help support life in our oceans?
4. Can space exploration help us monitor our volcanos anderuptions?
5. Did you ever seeGalapagos from space or other Pacific islands and what do they look like?
6. What are the strangest things you have seen in space?
7. How can space researchhelp protect animals on earth?
8. How does the ISS research contribute to the knowledge andprotection of our planet?
9. What is the function ofthe space station and what protocols do astronauts follow when they return toearth?
10. How do you eat or drink in space if there is no gravity?
11. How long does it taketo orbit the earth and if you see the Galápagos Islands on the way?
12. How can we use satellites to prevent disasters?
13. What do astronauts doto exercise their mind and body in a space station and what is their diet like?
14. Can you tell us aboutyour space suits and clothes you use?
15. Can the informationcollected from your satellite benefit the marine conservation in Galapagos?
16. Do you see volcanoesfrom space and did you see the Galapagos islands?
ARISS – Celebrating 20 Years of Amateur RadioContinuous Operations on the ISS
About ARISS:
Amateur Radio on the InternationalSpace Station (ARISS) is a cooperative venture of international amateur radiosocieties and the space agencies that support the International Space Station(ISS). In the United States, sponsorsare the Radio Amateur Satellite Corporation (AMSAT), the American Radio RelayLeague (ARRL), the ISS National Lab-Space Station Explorers, and NASA’s SpaceCommunications and Navigation program. The primary goal of ARISS is to promoteexploration of science, technology, engineering, the arts, and mathematicstopics by organizing scheduled contacts via amateur radio between crew membersaboard the ISS and students. Before and during these radio contacts, students,educators, parents, and communities learn about space, space technologies, andamateur radio. For more information, see www.ariss.org.
MediaContact:
DaveJordan, AA4KN
ARISSPR
Likeus on Facebook. Follow us on Twitter. Search on Amateur Radio on the ISS [email protected]_status.
Upcoming ARISS Contact Schedule as of 2020-12-31 04:00 UTC
Quick list of scheduled contacts and events:
Escuela de educación básica Oswaldo Guayasamín, Puerto Ayora, Santa Cruz Island, Ecuador, telebridge via ZS6JON
The ISS callsign is presently scheduled to be NA1SS
The downlink frequency is presently scheduled to be 145.800 MHz
The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html
The scheduled astronaut is Victor Glover KI5BKC
Contact is go for: Wed 2021-01-06 17:19:03 UTC 60 deg
Watch for live stream at https://youtu.be/3XmNxHTtR6Q (***)
*************************************************************************************************************
The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html
The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html
########################################################################################################################################
A multi-point telebridge contact means that each student will be on the telebridge from their own home.
****************************************************************************************************************************************
ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. Watch for future COVID-19 related announcements at https://www.ariss.org/
The following schools have now been postponed or cancelled due to COVID-19:
Postponed:
No new schools (***)
Cancelled:
No new schools
****************************************************************************************************************************************
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 2020-12-31 04:00 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.
https://www.amsat.org/amsat/ariss/news/arissnews.rtfhttps://www.amsat.org/amsat/ariss/news/arissnews.txt
The successful school list has been updated as of 2020-12-16 02:30 UTC.
https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
The ARISS webpage is at https://www.ariss.org/
Note that there are links to other ARISS websites from this site.
The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ARISS Contact Applications (United States)
The Amateur Radio on the International Space Station (ARISS) Program is seeking formal and informal education institutions and organizations, individually or working together, to host an Amateur Radio contact with a crew member on board the ISS. ARISS anticipates that the contact would be held between July 1, 2021 and December 30,
2021. Crew scheduling and ISS orbits will determine the exact contact dates. To maximize these radio contact opportunities, ARISS is looking for organizations that will draw large numbers of participants and integrate the contact into a well-developed education plan.
The deadline to submit a proposal is November 24th, 2020; the window has now closed.
Please direct any questions to ariss.us.education(a)gmail.com.
For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org.
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 ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ARISS Contact Applications (Europe, Africa and the Middle East)
Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April.
Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org
ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator.
For the application, go to: https://www.ariss.org/ariss-application.html.
ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com
ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) https://www.jarl.org/
ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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(a)amsat.org or aj9n(a)aol.com.
Listen for the ISS on the downlink of 145.8Ø MHz unless otherwise noted.
*******************************************************************************
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 https://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? Please note that the HamTV system has been brought back to earth for troubleshooting. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts.
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(a)sbcglobal.net
The HamTV webpage: https://www.amsat-on.be/hamtv-summary/
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100 schools:
Francesco IKØWGF with 140
Sergey RV3DR with 140
Satoshi 7M3TJZ with 138
Gaston ON4WF with 123
****************************************************************************
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.
Total number of ARISS ISS to earth school events is 1411.
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1344.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 48.
Please feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following US states and entities have never had an ARISS contact:
South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL information may be found at:
https://www.ariss.org/qsl-cards.html
ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS
****************************************************************************
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti…
Check out the Zoho reports of the ARISS contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 63 now on orbit
Kate Rubins KG5FYJ
Sergey Ryzhikov
Sergey Kud-Sverchkov
SpaceX-Crew 1 on orbit
Victor Glover KI5BKC
Mike Hopkins KF5LJG
Soichi Noguchi KD5TVP
Shannon Walker KD5DXB
****************************************************************************
73,
Charlie Sufana AJ9N
One of the ARISS operation team mentors
Upcoming ARISS Contact Schedule as of 2020-12-30 21:00 UTC
Quick list of scheduled contacts and events:
Escuela de educación básica Oswaldo Guayasamín, Puerto Ayora, Santa Cruz Island, Ecuador, telebridge via ZS6JON
The ISS callsign is presently scheduled to be NA1SS
The downlink frequency is presently scheduled to be 145.800 MHz
The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html
The scheduled astronaut is Victor Glover KI5BKC
Contact is go for: Wed 2021-01-06 17:19:03 UTC 60 deg
*************************************************************************************************************
The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html
The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html
########################################################################################################################################
A multi-point telebridge contact means that each student will be on the telebridge from their own home.
****************************************************************************************************************************************
ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. Watch for future COVID-19 related announcements at https://www.ariss.org/
The following schools have now been postponed or cancelled due to COVID-19:
Postponed:
No new schools (***)
Cancelled:
No new schools
****************************************************************************************************************************************
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 2020-12-30 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.
https://www.amsat.org/amsat/ariss/news/arissnews.rtfhttps://www.amsat.org/amsat/ariss/news/arissnews.txt
The successful school list has been updated as of 2020-12-16 02:30 UTC.
https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
The ARISS webpage is at https://www.ariss.org/
Note that there are links to other ARISS websites from this site.
The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ARISS Contact Applications (United States)
The Amateur Radio on the International Space Station (ARISS) Program is seeking formal and informal education institutions and organizations, individually or working together, to host an Amateur Radio contact with a crew member on board the ISS. ARISS anticipates that the contact would be held between July 1, 2021 and December 30,
2021. Crew scheduling and ISS orbits will determine the exact contact dates. To maximize these radio contact opportunities, ARISS is looking for organizations that will draw large numbers of participants and integrate the contact into a well-developed education plan.
The deadline to submit a proposal is November 24th, 2020; the window has now closed.
Please direct any questions to ariss.us.education(a)gmail.com.
For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org.
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 ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ARISS Contact Applications (Europe, Africa and the Middle East)
Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April.
Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org
ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator.
For the application, go to: https://www.ariss.org/ariss-application.html.
ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com
ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) https://www.jarl.org/
ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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(a)amsat.org or aj9n(a)aol.com.
Listen for the ISS on the downlink of 145.8Ø MHz unless otherwise noted.
*******************************************************************************
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 https://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? Please note that the HamTV system has been brought back to earth for troubleshooting. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts.
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(a)sbcglobal.net
The HamTV webpage: https://www.amsat-on.be/hamtv-summary/
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100 schools:
Francesco IKØWGF with 140
Sergey RV3DR with 140
Satoshi 7M3TJZ with 138
Gaston ON4WF with 123
****************************************************************************
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.
Total number of ARISS ISS to earth school events is 1411.
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1344.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 48.
Please feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following US states and entities have never had an ARISS contact:
South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL information may be found at:
https://www.ariss.org/qsl-cards.html
ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS
****************************************************************************
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti…
Check out the Zoho reports of the ARISS contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 63 now on orbit
Kate Rubins KG5FYJ
Sergey Ryzhikov
Sergey Kud-Sverchkov
SpaceX-Crew 1 on orbit
Victor Glover KI5BKC
Mike Hopkins KF5LJG
Soichi Noguchi KD5TVP
Shannon Walker KD5DXB
****************************************************************************
73,
Charlie Sufana AJ9N
One of the ARISS operation team mentors
Hi,
I received many pictures from ISS. I'm using RTL dongle 2832 with SDR#
program and
MMSSTV with virtual cable and Orbitron.I found many rainbow lines on
pictures and I analysed that this is the case of transmission with APRS
local stations around 5km away and 1mhz below my receiving.
Anyone have experirence of good filtering or set the SDR# program to reduce
the infulence from
of transmitter which is far away from 145.8MHz but still in the 2MHz
bandwidth of RTL2832?
BR Andy
