Panasonic Lumix CM1

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Getting ready for 8/21/17

I am making a journal as I get ready for the total eclipse of the sun on 8/21/17 and you can find it on http://www.astrotidbits.com.  Irregular posts as I do something new or learn new ways of doing things.

General Ham: CW Procedures/Abbreviations

Have I mentioned that the General Ham License Manual has a ton more information than the Technician manual?  If I haven’t already, it’s true.  It’s awesome.

So it’s a lot of work to spell out the full text of all words and phrases, so telegraphers developed an extensive set of abbreviations and procedural signals called prosigns.  These are two letters sent together as a single character as indicated by an overbar.   So the prosign  AR  is used to indicated “End of Message”.

And then there are abbreviations to shorten common words such as “AND” is “ES” and “GOING” is “GG” and “WEATHER” is “WX”.

Calling CQ on CW is about the same as on phone/voice.  "DE" is an abbreviation used in place of “form” and the procedural signal K replaces “over”:

CQ CQ CQ DE W0TTV W0TTV W0TTV K

A response might look like the following:

W0TTV DE W1AW W1AW W1AW K

There’s no need to send the CQing station’s call more than once unless there’s interferences or the signal is weak.  When signals are strong and clear, those responding to CQ may even just send their call once or twice.

Good idea is also to respond at the speed of the calling station but if you’re uncomfortable receiving at that speed, send the Q signal “QRS” (send slower) before the final K.  Or if you want to go faster, QRQ.

Also adjust your transmitting frequency so that your signals is “zero beat” with the other signal so that you will be on the same frequency.  This means the two signals produce the same audio tone in a receiver.  Check the radio’s operating manual for instructions on how to zero beat another signal.

And once you’re in contact with another station, the prosign KN is used instead of K to prevent other stations from breaking in during the contact.  It means “Only the station with whom I am in contact should respond”.  When asked if you are ready to receive, “QRV” means “I’m ready to copy.”  After receiving the message, “QSL” means  "I acknowledge receipt.“

Then when it’s time to end the QSO, the prosign SK is used to let any listener know that the contact is completed: W1AW DE W0TTV SK and if you’re going off the air, add CL for closing station.

Phew!

@atdiy/@tymkrs

GoPro Hero 5

What’s Up for March 2017?

What’s Up for March? The moon hides red star Aldebaran and crescents dazzle after dusk.

On March 4 the first quarter moon passes between Earth and the star Aldebaran, temporarily blocking our view of the star. This is called an occultation. 

The occultation begins and concludes at different times, depending on where you are when you view it.

The event should be easy to see from most of the U.S., Mexico, most of Central America, the Western Caribbean and Bermuda. 

Observers along a narrow path from Vancouver, British Columbia, to Hartford, Connecticut, will see the moon “graze” the star. The star will disappear and reappear repeatedly as hills and valleys on the moon alternately obscure and reveal it.

As seen from Earth, both Mercury and Venus have phases like our moon. That’s because they circle the sun inside Earth’s orbit. 

Planets that orbit between Earth and the sun are known as inner or inferior planets.

Inferior planets can never be at “opposition,” which is when the planet and the sun are on opposite sides of Earth.

But inferior planets can be at “conjunction,” which is when a planet, the sun and Earth are all in a straight line. 

Conjunction can happen once when the planet is on the opposite side of the sun from Earth and again when it’s on the same side of the sun as Earth. 

When a planet is on the opposite side of the sun from Earth, we say it is at “superior conjunction.” As the planet moves out from behind the sun and gets closer to Earth, we see less and less of the lit side. We see phases, similar to our moon’s phases. 

Mercury is at superior conjunction on March 6. 

A few weeks later, the planet emerges from behind the sun and we can once again observe it. By the end of March we’ll see a last-quarter Mercury.

 On April 20 Mercury reaches “inferior conjunction.”

Brilliant Venus is also racing toward its own inferior conjunction on March 25. Watch its crescent get thinner and thinner as the planet’s size appears larger and larger, because it is getting closer to Earth.

Finally, look for Jupiter to rise in the East. It will be visible all month long from late evening until dawn.

You can catch up on solar system missions and all of our missions at www.nasa.gov

Watch the full “What’s Up for March 2017″ video here: 

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

Saturn’s moon, Daphnis, and Saturn’s rings.

JPL Engineer explains how they are testing the next generation of Mars parachutes in the video “LDSD: We Brake for Mars”

Thirty years ago today, at 11:38 a.m. EST, January 28, 1986, the space shuttle Challenger lifts off from Cape Canaveral, Florida. Christa McAuliffe, teacher from New Hampshire, was to be the first ordinary U.S. civilian to travel into space. Challenger‘s launch countdown was repeatedly delayed because of weather and technical problems. Finally, on January 28, the shuttle lifted off.

73 seconds later, hundreds on the ground, including Christa’s family, stared in disbelief as the shuttle exploded in a forking plume of smoke and fire, killing all seven crew members. Millions more watched the heart-wrenching tragedy unfold on live television.

“The future doesn’t belong to the faint-hearted. It belongs to the brave.” President Reagan said. “The Challenger crew was pulling us into the future, and we’ll continue to follow. Nothing ends here; our hopes and our journeys continue.”

Jupiter’s swirling clouds around the Great Red Spot. NASA/JPL. 

What is the next step for hacktivists, radical or not. What’s 4Chan, what’s Anonymous and what’s the next thing? What’s the real deal - Ray Johansen gives his views.

Revolutionaries are always controversial. Some get proven right, some as a doing bad, some seen as doing equal amounts of both.The truth is complex. So we let Ray give us his views.

As part of our transparent process, we’re making some of our research interviews available for all.  Check out both our Transparently Unedited interviews on our YouTube channel where you’ll and also find other awesome clips from a diverse set of characters.