David De Silva @G7AGI
I’ve just discovered @edinburghmorse. Looking forward to seeing the new web site go live.
Planetary Society @exploreplanets
Amateur radio enthusiasts were able to detect the carrier signal of a decades-old NASA spacecraft: planetary.org/blogs/emily-la…
In this section, one question was dropped and another about Keplerian elements was added…Dan
As a Technician Class licensee, you can make contacts via amateur radio satellites. Any amateur whose license privileges allow them to transmit on the satellite uplink frequency may be the control operator of a station communicating through an amateur satellite or space station. (T8B01)
Amateur satellites are basically repeaters in space. As such they have an uplink frequency, which is the frequency on which you transmit and the satellite receives, and a downlink frequency, on which the satellite transmits and you receive. As with other transmissions, the minimum amount of power needed to complete the contact should be used on the uplink frequency of an amateur satellite or space station. (T8B02)
Often, the uplink frequency and downlink frequency are in different amateur bands. For example, when a satellite is operating in “mode U/V,” the satellite uplink is in the 70 cm band and the downlink is in the 2 meter band. (T8B08)
The International Space Station often has amateur radio operators on board. Any amateur holding a Technician or higher class license may make contact with an amateur station on the International Space Station using 2 meter and 70 cm band amateur radio frequencies. (T8B04) Like most amateur satellites, the Space Station is in low earth orbit. When used to describe an amateur satellite, the initials LEO means that the satellite is in a Low Earth Orbit. (T8B10)
Amateur satellites are often equipped with beacons. A satellite beacon is a transmission from a space station that contains information about a satellite. (T8B05) FM Packet is a commonly used method of sending signals to and from a digital satellite. (T8B11)
How do you know when you are able to communicate via an amateur satellite? A satellite tracking program can be used to determine the time period during which an amateur satellite or space station can be accessed. (T8B03) The Keplerian elements are inputs to a satellite tracking program. (T8B06)
Two problems that you must deal with when communicating via satellite is Doppler shift and spin fading. Doppler shift is an observed change in signal frequency caused by relative motion between the satellite and the earth station. (T8B07) Rotation of the satellite and its antennas causes “spin fading” of satellite signals. (T8B09)
On October 9, thousands of amateurs said “HI to Juno. Now, there are stories about the event on websites all over. I think the best is this video produced by NASA:
AMSAT-UK also ran a story about Say HI to Juno. I like this story because it includes a waterfall display of the 10m band showing all the signals.
Physics.Org ran the story, “Juno spacecraft hears amateur radio operators say ‘Hi.’” This story features a photo of a smiling Tony Rogers, the president of the University of Iowa ham radio club, as he mans the equipment used to send the message to the Juno spacecraft.
Another selection of news items about amateur radio from around the country.
Hamfest brings on-air friends together (Journal-Gazette of Ft. Wayne, IN). Amy Kritzman and her husband, Ron, occupied some prime real estate as the 41st annual Fort Wayne Hamfest and Computer Expo opened Saturday. Facing the entrance, the Kritzmans don’t carry the adapters, cords and tools that thousands of ham radio operators forage through every year. What the couple have in stock is personality. One look around Memorial Coliseum Exposition Center’s floor and it’s obvious the Kritzmans are known for their custom-embroidered hats, featuring the names and call signs of radio operators in different thread colors.
Teen takes lead on call to International Space Station.(Contra Costa Times, CA). More than 100 students sat on the playground of Rancho Romero Elementary School on Wednesday morning staring into the clear, blue sky, waiting for their 10-minute date with an astronaut. Many watched in rapt anticipation for one of the two 14-foot antenna towers perched atop one of the school’s buildings to tilt into motion. That, they were told, would be the first sign they had made direct contact with the International Space Station.
‘Roger on Your Radio’ signs off at WSGE. For 33 years, Roger Burt – aka “Roger on Your Radio” – stood inside radio station WSGE’s studio at Gaston College in Dallas and broadcast his four-hour radio program called “The Good Stuff,” which featured music from the big band eras.
There’s so much good stuff on my Twitter feed this afternoon, I couldn’t limit myself to just three Tweets…Dan
DX World @DX_World
VK0GB – Casey Base, Antarctica: Gerry, VK0GB (G3WIP) is located at Casey Base, Antarctica until February 2014…. bit.ly/1beTklH
Fake Science @FakeScience
Someone forgot to put “Saltine” on this copy of the Periodic Table.
Peter Goodhall @2e0sql
Amsat-UK have released a handbook for the FUNcube-1 satellite, the launch date is rapidly approaching 13 days to go! wp.me/p3TuHs-kE
On October 9, 2013, the spacecraft Juno will fly by Earth to get a gravity assist and put it on a course for Jupiter. To celebrate this event, NASA is inviting amateur radio operators around the world to say “HI” to Juno in a coordinated Morse Code message. Juno’s radio and plasma wave experiment, called Waves, should be able to detect the message if enough people participate.
NASA is asking us to send the letters “HI” in verrrrry slow Morse Code on 26 different frequencies in the 10m band. I say verrrrry slow because each dit is 30 seconds long.
The event is to start at 1800 UTC on October 9 and last until 2040 UTC. The “HI” message is to be repeated every 10 minutes, beginning at 18:00, 18:10, 18:20, etc. as shown in the figure below.
The Say HI to Juno Web page has much more information on this event. The page include a table of frequencies on which to transmit and information on how to get a QSL card. There is also a Facebook page.
I think that this is a very cool event, and I hope that if you have the capability of transmitting on 10m that you’ll participate. Let’s all say HI to Juno!
More cool stuff from the electronics engineering trade magazines….Dan
LEO satellite tracking in your backyard. Learn how one guy built his own satellite tracking system in his backyard.
The rise of the online circuit-design collective. Though still in the infancy stage, design and simulation tools that run entirely in the browser are pushing their way onto the EDA landscape. The ultimate goal is that they become essential players within the realm of professional design.
Test and measurement turns to open source, Kickstarter. The field of test and measurement is set to benefit from open-source software applications if a Kickstarter fundraising project is successful. The Red Pitaya is a credit card-sized, reconfigurable measurement board with 60MHz of input bandwidth and an onboard Xilinx Zinq FPGA to perform signal processing.
This is a great story….Dan
Astronaut talks about his ham radio contacts fb.me/VdbC8Qr8
Heiko Linke @hlinke
a revolution in the sdr-world at kickstarter: hackrf, an open source SDR platform: kickstarter.com/projects/mossm…
Thanks to my latest donor, Kent, K4AHU!
Kent says, "I, and some of my ham friends, have recommended your fine No Nonsense Guide to many of my friends throughout the Florida Panhandle. To date, almost 100 have obtained that Technician license or used the other guides to attain a higher class license."
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My No-Nonsense Study Guides are now available as a PDF file or as as an e-book for either the Amazon Kindle or Barnes&Noble Nook. The PDF version of the Tech and General Class study guides are free. There is a small charge for the e-book versions and for all versions of the Extra study guide. See the Study Guide page for more details.