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Stunning Ultra-HD View; Sun Timelapse 2015 NASA/SDO
27 March 2016 | by This video is ten minutes of coolness.
This cool time-lapse video shows the Sun (in ultra-high definition 3840×2160 – 4k on YouTube) during the entire year, 2015. The video captures the Sun in the 171-angstrom wavelength of extreme ultraviolet light. Our naked, unaided eyes cannot see this, but this movie uses false-colorization (yellow/gold) so that we can watch in high definition.
The movie covers a time period of January 2, 2015 to January 28, 2016 at a cadence of one frame every hour, or 24 frames per day. This timelapse is repeated with narration by solar scientist Nicholeen Viall and contains close-ups and annotations. The 171-angstrom light highlights material around 600,000 Kelvin and shows features in the upper transition region and quiet corona of the sun.
The first half tells you a bit about the video and the Sun, and you can see the entire year 2015 rotate by. The second half is narrated by a NASA scientist. It is worth watching all ten minutes. And, then, sharing!
The sun is always changing and NASA’s Solar Dynamics Observatory is always watching.
Launched on Feb. 11, 2010, SDO keeps a 24-hour eye on the entire disk of the sun, with a prime view of the graceful dance of solar material coursing through the sun’s atmosphere, the corona. SDO’s sixth year in orbit was no exception. This video shows that entire sixth year–from Jan. 1, 2015 to Jan. 28, 2016 as one time-lapse sequence. Each frame represents 1 hour.
SDO’s Atmospheric Imaging Assembly (AIA) captures a shot of the sun every 12 seconds in 10 different wavelengths. The images shown here are based on a wavelength of 171 angstroms, which is in the extreme ultraviolet range and shows solar material at around 600,000 Kelvin (about 1 million degrees F.) In this wavelength it is easy to see the sun’s 25-day rotation.
During the course of the video, the sun subtly increases and decreases in apparent size. This is because the distance between the SDO spacecraft and the sun varies over time. The image is, however, remarkably consistent and stable despite the fact that SDO orbits Earth at 6,876 mph and the Earth orbits the sun at 67,062 miles per hour.
A blending of an entire year, 2015, of the Sun as seen by NASA SDO at EUV 171 Angstroms
Why This is Important
Scientists study these images to better understand the complex electromagnetic system causing the constant movement on the sun, which can ultimately have an effect closer to Earth, too: Flares and another type of solar explosion called coronal mass ejections can sometimes disrupt technology in space. Moreover, studying our closest star is one way of learning about other stars in the galaxy. NASA’s Goddard Space Flight Center in Greenbelt, Maryland. built, operates, and manages the SDO spacecraft for NASA’s Science Mission Directorate in Washington, D.C.
For us radio enthusiasts, the study of the Sun helps us understand the dynamics of radio signal propagation. And, that aids us in communicating more effectively and skill.
Thanks for sharing, voting, and watching. More information and live Sun content can be accessed 24/7 at http://SunSpotWatch.com
You can also get the Space Weather and Radio Propagation Self-study Course at http://SunSpotWatch.com/swc
Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel
Ham College 15
Satellite communications.
45:13
George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].
RPiGate again
For a few weeks I have been attempting to use an RTL-SDR and a raspberry Pi 2 as an APRS iGate. Dutifully following a number of tutorials I failed to ‘Kalibrate’ the dongle several times and so put it to one side. Today however I have managed to get the thing running. Not with the original tutorial but with a different application called ‘Direwolf’.
There are quite a few clever sods kicking about and the guy who pulled this together is no exception. John Langer,WB2OSZ has not only produced a cracking application but also one of the most straightforward and detailed installation documents as well. What I particularly liked was the way that there was a step followed by an explanation of what the step was meant to achieve. I’m no great linux fan, partly because I don’t understand what the hell is going on and more importantly for me, why its not doing what I thought it should do and why. This small success may point me more in that direction though.
More to the point see. I told you it was working!
Alex Hill, G7KSE, is a regular contributor to AmateurRadio.com and writes from Cumbria, UK. Contact him at [email protected].
QSO Today interview with VK3YE
This is well worth a listen, when having your midnight cocoa:
http://www.qsotoday.com/podcasts/vk3ye
I can only reflect some of the similar things of visiting the dump, or being given old televisons & radios to pull apart that got myself interested in the hobby many years ago..
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].
QSO Today interview with VK3YE
This is well worth a listen, when having your midnight cocoa:
http://www.qsotoday.com/podcasts/vk3ye
I can only relect some of the similar things of visiting the dump, or being given old televisons & radios to pull apart that got myself interested in the hobby many years ago..
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].
Amateur Radio Weekly – Issue 104
Realtime QSO information from Heard Island
Dashboard shows QSO counts, recently logged callsigns, and QSO search.
DXA3.org
Multimode Digital Voice Modem
A project describing an adapter for D-Star, DMR and other digital modes based on an Arduino Due and a little PCB to put on top.
Notizbl0g.
Radio attack lets hackers steal 24 different car models
Thieves are amplifying near-by key fob signals.
Wired
The Radio Amateur’s Code
Radio sport that involves chasing that elusive country, county, SOTA peak, NPOTA entity or whatever should never become the focus of our lives, or our reason for being.
W2LJ
Why I changed my call sign after 28 years
Up until last month, I’ve used my original Novice-class call sign since it came in the mail in 1988.
N4AE
Ham Radio and Photography
It goes without saying that I always have my emergency preparedness kit with me that is stored in the cargo bay of my mobile, as you never know when you might need to draw from it.
VE6AB
Man in trouble for cellphone jammer on public train
A 63 year old financial analyst is facing serious charges, because he used a cellphone jammer on a public train.
Southgate
The technology working behind the scenes of Heard Island
Here is a pictorial list of the technology we are using to support VK0EK. Every thing we use is in the “Cloud” – and everything is automatically maintained and backed up.
VK0EK
Rash believed to be caused by radiation from mobile phone mast
Resident said she suffers from electrosensitivity- a condition suffered by people who in varying degrees are made ill by connection to electricity.
Ledbury Reporter
North Korea intensifies shortwave jamming
North Korea has been from the beginning of March continually signal jamming radio broadcasts on the shortwave frequency used by the South Korean non-profit broadcaster Unification Media Group.
The SWLing Post
Video
NOAA WX Sat umbrella antenna
Using an umbrella in place of a quadrifilar helix antenna.
YouTube
Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.
BLT+ Balanced line tuner at Excalibur
Another portable test of the BLT+ tuner
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| KX3 operating on internal battery. What a fantastic portable rig. |
I took the BLT+ balanced line tuner out to the Excalibur antenna site to try it out on the doublet antenna that we put up last Saturday. This was the first test of that antenna (40m and 80m using a common feedpoint).
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| BLT+ connected to open wire line (under the gloves) going to ta 40m Doublet at 65ft |
I used the BLT+ to tune the 40m/80m doublet. Balanced line antennas perform better with a tuner designed for balanced line and this was a good test for both the tuner and the new antenna.
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| Portable shack, courtesy of three plastic chairs |
I quickly matched the doublet using the BLT+ using the lowest impedance setting which is also the most efficient. I was glad to see that the BLT SWR LED indicator is bright enough to be seen in direct sunlight. I was wondering about that but you can definitely tell when it dims even in direct sunlight.
Performance
AA4OO sitting back and listening to the QSO
The Doublet's feed line has not been brought to the shack yet so I was just sitting under the antenna. The open feed line is running along the ground for a bit which certainly didn't help the signal but we haven't installed the posts to carry the feed line over to the shack and I was too lazy to move the chairs far enough away to keep the feed line in the air.
In the foreground is some saw-grass common on the NC coast. I'm not sure why it's growing this far inland.
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| Portable shack at the Excalibur antenna site... The Doublet is 65 feet above my head |
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| Waiting my turn in the QSO... holding the Palm Single Paddle. BLT+ tuner in the chair to the right |
Video
Summary
Richard Carpenter, AA4OO, is a regular contributor to AmateurRadio.com and writes from North Carolina, USA. Contact him at [email protected].
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