Posts Tagged ‘amateurradio.com’
ARISS 20th Anniversary SSTV
July 24th, 2017 | 
Author: This weekend has seen another SSTV event from the International Space Station, this time in commemoration of the 20th Anniversary of ARISS (Amateur Radio on the International Space Station)
The 20 year history of ARISS was displayed through a collection of 12 images highlighting the accomplishments of the project over the last two decades.
As the ISS has orbited the world it has been transmitting the SSTV signals using FM on the usual downlink of 145.800 MHz, here at my QTH in the UK the passes have occurred late at night into the early morning, averaging 3 - 4 reasonable passes each day.
The signal has been very strong and so some excellent low noise images have been received by many people using just modest equipment. While not the greatest technical achievement in the world it nonetheless generates much needed interest in ARISS and amateur space communication.
My own system consisted of the Yaesu FT-857D and MMSSTV running on the shack PC and was left on automatic receive (I was tucked up in bed) and managed to get decent copies of all the images.
Image 8 reminded me of the fun I had back in 2011-2012 of receiving the ARRISAT-1 and was one of the key things that convinced me to finally get off my backside and actually get licensed, even if it took me another 12 months and to this day haven't really cracked satellites myself! My previous blog posts on that can be found at http://nerdsville.blogspot.co.uk/search/label/arissat-1
Here are the best of my images, for a full description of what each one depicts visit http://ariss-sstv.blogspot.co.uk/2017/07/anniversary-image-descriptions.html
The 20 year history of ARISS was displayed through a collection of 12 images highlighting the accomplishments of the project over the last two decades.
As the ISS has orbited the world it has been transmitting the SSTV signals using FM on the usual downlink of 145.800 MHz, here at my QTH in the UK the passes have occurred late at night into the early morning, averaging 3 - 4 reasonable passes each day.
The signal has been very strong and so some excellent low noise images have been received by many people using just modest equipment. While not the greatest technical achievement in the world it nonetheless generates much needed interest in ARISS and amateur space communication.
My own system consisted of the Yaesu FT-857D and MMSSTV running on the shack PC and was left on automatic receive (I was tucked up in bed) and managed to get decent copies of all the images.
Image 8 reminded me of the fun I had back in 2011-2012 of receiving the ARRISAT-1 and was one of the key things that convinced me to finally get off my backside and actually get licensed, even if it took me another 12 months and to this day haven't really cracked satellites myself! My previous blog posts on that can be found at http://nerdsville.blogspot.co.uk/search/label/arissat-1
Here are the best of my images, for a full description of what each one depicts visit http://ariss-sstv.blogspot.co.uk/2017/07/anniversary-image-descriptions.html
On this day, 48 years ago
Here men from the planet Earth
First set foot upon the Moon
July 1969, A.D.
We came in peace for all mankind
Neil A. Armstrong Michael Collins Edwin E. Aldrin Jr.
Astronaut Astronaut Astronaut
Richard M. Nixon
President, United States of America
To read about the communications systems that the Lunar Module employed, here are two good links from the NASA Archives: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720023255.pdf and https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090015392.pdf
The S-band transceiver was the primary transceiver used for TV, telemetry, biomedical data, and voice communications from the Lunar surface. It had an output power of 750 mW (QRPp!). That signal then went to the S-band power amplifier, which boosted the signal to an outstanding "QRO" signal of 18.6 Watts.
72 de Larry W2LJ
QRP - When you care to send the very least
On this day, 48 years ago
Here men from the planet Earth
First set foot upon the Moon
July 1969, A.D.
We came in peace for all mankind
Neil A. Armstrong Michael Collins Edwin E. Aldrin Jr.
Astronaut Astronaut Astronaut
Richard M. Nixon
President, United States of America
To read about the communications systems that the Lunar Module employed, here are two good links from the NASA Archives: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720023255.pdf and https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090015392.pdf
The S-band transceiver was the primary transceiver used for TV, telemetry, biomedical data, and voice communications from the Lunar surface. It had an output power of 750 mW (QRPp!). That signal then went to the S-band power amplifier, which boosted the signal to an outstanding "QRO" signal of 18.6 Watts.
72 de Larry W2LJ
QRP - When you care to send the very least
Just noticed something
The graphic for Windows 10 Mail:
Do you see it?
72 de Larry W2LJ
QRP - When you care to send the very least!
Do you see it?
72 de Larry W2LJ
QRP - When you care to send the very least!
Just noticed something
The graphic for Windows 10 Mail:
Do you see it?
72 de Larry W2LJ
QRP - When you care to send the very least!
Do you see it?
72 de Larry W2LJ
QRP - When you care to send the very least!
FOBB 2017 – ICYMI
Just in case you missed it - THE Summer QRP Classic - The Flight of the Bumblebees is on! The event is on Sunday, July 31st from 17:00 to 21:00 UTC. To get a Bumblebee number, you have to first to to the Bee database to see what's been assigned: https://docs.google.com/spreadsheets/d/1r0ICCSjbErmIfRQz2U7hZJkSccuQ5ukHEtVXzmOF5eM/edit#gid=119767365 Send an e-mail to ARSBumblebees@gmail.com and be sure to include your first name, call sign, the field location you plan to operate from and your three top choices for a Bee number. Keep in mind that you are encouraged to participate in the FOBB as a home station - but only Field Stations can have a Bee #. After you've sent KI6SN your request, be sure to keep an eye on the roster at the link above. That's where you will be able to determine what number you've been assigned. The rest of the rules can be found at http://arsqrp.blogspot.com/2017/07/announcing-ars-2017-fobb.html FOBB is, was, and continues to be the best Summer Outdoor QRP event, bar none. It's the equivalent of the Masters, or Wimbledon or Tour de France of the QRP Summer contest season. Get out there, get some sunshine and some breeze in your hair and have fun! I can hear wings buzzing already! 72 de Larry W2LJ
QRP - When you care to send the very least!
FOBB 2017 – ICYMI
Just in case you missed it - THE Summer QRP Classic - The Flight of the Bumblebees is on! The event is on Sunday, July 31st from 17:00 to 21:00 UTC.
To get a Bumblebee number, you have to first to to the Bee database to see what's been assigned:
https://docs.google.com/spreadsheets/d/1r0ICCSjbErmIfRQz2U7hZJkSccuQ5ukHEtVXzmOF5eM/edit#gid=119767365
Send an e-mail to ARSBumblebees@gmail.com and be sure to include your first name, call sign, the field location you plan to operate from and your three top choices for a Bee number.
Keep in mind that you are encouraged to participate in the FOBB as a home station - but only Field Stations can have a Bee #.
After you've sent KI6SN your request, be sure to keep an eye on the roster at the link above. That's where you will be able to determine what number you've been assigned.
The rest of the rules can be found at http://arsqrp.blogspot.com/2017/07/announcing-ars-2017-fobb.html
FOBB is, was, and continues to be the best Summer Outdoor QRP event, bar none. It's the equivalent of the Masters, or Wimbledon or Tour de France of the QRP Summer contest season. Get out there, get some sunshine and some breeze in your hair and have fun!
I can hear wings buzzing already!
72 de Larry W2LJ
QRP - When you care to send the very least!
To get a Bumblebee number, you have to first to to the Bee database to see what's been assigned:
https://docs.google.com/spreadsheets/d/1r0ICCSjbErmIfRQz2U7hZJkSccuQ5ukHEtVXzmOF5eM/edit#gid=119767365
Send an e-mail to ARSBumblebees@gmail.com and be sure to include your first name, call sign, the field location you plan to operate from and your three top choices for a Bee number.
Keep in mind that you are encouraged to participate in the FOBB as a home station - but only Field Stations can have a Bee #.
After you've sent KI6SN your request, be sure to keep an eye on the roster at the link above. That's where you will be able to determine what number you've been assigned.
The rest of the rules can be found at http://arsqrp.blogspot.com/2017/07/announcing-ars-2017-fobb.html
FOBB is, was, and continues to be the best Summer Outdoor QRP event, bar none. It's the equivalent of the Masters, or Wimbledon or Tour de France of the QRP Summer contest season. Get out there, get some sunshine and some breeze in your hair and have fun!
I can hear wings buzzing already!
72 de Larry W2LJ
QRP - When you care to send the very least!
