Laser Spirograph

With an upcoming open house, everyone around the observatory is frantically trying to get everything in place. There will be all manner of science exhibits throughout the observatory headquarters complex. Exhibits about our research, controlling the telescopes, an IR camera display (Get your portrait in IR!), liquid nitrogen ice-cream, just a lot of fun.

Laser Spirograph
A two mirror laser spirograph build
I am coordinating an exhibit we named Optics Lab… As you would expect, most of the exhibits in our area teach basic optics, light, lenses, etc. Understanding light and optics is a basic skill in a large observatory. We will have a few lenses on rails, a laser ray-trace table with acrylic lenses, an exhibit on polarization, and even a simple laser interferometer.

When attempting to teach something, a little eye-candy is helpful to catch the attention of the audience, particularly kids. Our group includes a laser engineer and a laser tech, so the use of lasers was obvious. There is little that catches the eyes of a kid faster than a bright laser beam. One of the first ideas they tossed on the table was a laser spirograph. After a few moments thought the answer was clear… I can build that!

SpiroLaser PCB
Schematic for the SpiroLaser control PCB
Time to dig about in the scrap box! Actually more than a few boxes in my case, I am a bit of an electronics pack rat. A green laser module… Check! Small DC motors… Check! A few voltage regulators… Check! A couple potentiometers… Check! First surface mirrors… Check! In an hour of rummaging about I quickly located everything that was needed.

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The Forecast was Correct

It does appear that we got a substantial amount of snow last night. Webcam images show quite a bit of snow. No tracks either, no one has attempted the summit yet, the snowplows have not made it up.

I am not scheduled to go up today, or even again this week. Fresh snow can be pretty, shoveling snow? Not so much. Actually, I expect that the summit crew will be sitting at Hale Pohaku much of the morning, waiting for the plows to complete their job, not the most productive way to spend the day.

The snow is expected to last through today and into tomorrow. The White Mountain should be white for a while.

Fresh Snow
Fresh snow atop Mauna Kea, the first good storm of 2013

A Little Snow in the Forecast

It was a gorgeous day when we arrived on the summit. A deep blue sky above brilliant white snow covering the slopes. It was difficult to put much faith in a forecast calling for truly dire weather. I could see nothing to the southwest, the direction this weather was approaching from, just the blue Pacific stretching to the horizon.

Snow
A little fresh snow on the summit of Mauna Kea
Oh yeah… The car is still there. It is a truly sad sight to see, the car halfway down the slope. Rumor had it that a tow truck was to come up today to remove the vehicle, but the car was still on the slope when we left.

Not a bad day, I accomplished everything on my to-do list for the day. Some work in AO to check for any stray light, removing some old servers to make way for a new system, locating and labeling some optical fibers that are already in place for this same system. Everything went well, except the lunch time cribbage game, I lost badly.

The weather was degrading all day, first the clouds loomed overhead, then they descended as a heavy fog while the temperature dropped. It did indeed begin to look like the forecasts might have a bit of truth. The prediction is for heavy snow, as much as 6-10 inches. Not sure if that will materialize, it would be nice, we have not had any real snowfall this winter. I will just have to check the webcams tomorrow morning.

It was beginning to snow when we pulled out.

A White Mountian

It was not in the forecast. But It came anyway. The night crew abandoned the summit around 3am in the face of ice and snow.

Summit webcams show an increasingly white mountain this morning. Given the numbers in the met data, it is not going to stop anytime soon. Temperatures of well below freezing, -6°C (20°F) and 100% humidity tell the tale of continuing snow.

No sign that our holiday crew has made it to the summit as of yet. I expect them to make an attempt, even if they stay just an hour or two to perform those few tasks that must be done each day. Not much problem for me, a snowy weekend makes for a quiet weekend on-call.

Keck Camera #2
Accumulating snow in front of Keck, 18Feb2013

Mauna Kea Claims Another…

The mountain claimed another vehicle this afternoon.

A rented Nissan Altima parked at the Hoku Kea telescope rolled off the ridge, a steep cinder slope about 400ft high. Fortunately neither passenger was hurt, the woman in the passenger seat exited the vehicle when it began rolling, her companion was already out. Witnesses describe the vehicle rolling several times as it descended the slope.

Now the Mauna Kea Rangers have the unenviable task of removing the vehicle and cleaning up the mess. The rangers report indicates that the vehicle does not appear to be leaking any fluids. Hopefully the vehicle can be removed without further damage to the summit. OMKM’s Natural Resources Manager and an entomologist are being consulted before removal.

Just another reminder to take our mountain seriously…

Mauna Kea Wreck
Wreck of a Nissan Altima that rolled off the summit ridge of Mauna Kea, photo by Shane Fox, used with permission
Mauna Kea Wreck
Location of a vehicle that rolled off the summit ridge of Mauna Kea, photo by Shane Fox, used with permission

A Video Project

Trying to finish up a new video project for Keck Week. As one would guess, the video features the history of Keck. Looking for material has been a great excuse to dig through the Keck archives. Through the expertise of our staff librarian, Peggi Kamisato, I have pursued hundreds of photos and other material from the history of these great telescopes. Turning page after page of photos albums from the construction of the two telescopes, thumbing through observing log #1 to read the notes from those first nights of science observations. I have a new appreciation for the history of this place.

Not all of this material can make it into the video. Some of the best can, hopefully resulting in a worthwhile result. Just a teaser for today, one of the photos from construction that did not make the cut. What about the video? Come to Keck Week and see the premiere!

Keck 1 Construction 1987
Construction of the Keck 1 Telescope circa 1987, photo by Tom Wynne