ISR Workshop Pt 1

I arrived in Sodankylä, Finland on Sunday with a group of about 50 students and instructors.  The group of students was incredibly diverse, with men and women from all over the world.  Aside from the handful of American students, people had come from Peru, China, Japan, South Korea, Egypt, Ethiopia, France, England, and Canada, just to name a few.  As a result, by the time we arrived most people were too exhausted to do any work.  Instead, we unpacked and went for a walking tour of the area.

A walk around the town of Sodankylä was a great way to stretch the legs and get a feel for the local environment. The rivers that surround the town are beautiful.

The town of Sodankylä is fairly small, only about 6,000 people live in the town proper.  It’s a quiet region in Lapland (Northern Finland) with lots of wilderness.  The mosquitoes weren’t quite as oppressive as I had feared and the fresh air was a nice break from 2 days of traveling in confined spaces.

This statue in downtown Sodankylä commemorates the long history of reindeer husbandry in Lapland and all over Scandinavia. The reindeer are semi-domesticated and have been herded for well over a thousand years.

Monday morning we started the week of school.  The first couple of days were mostly classroom lectures.  By the end of Tuesday, we were split into groups of 6 students to devise an experiment.  Tuesday night we ran experiments using incoherent scatter radar (ISR) facilities across the globe.

When we arrived for our experiment at the radar facility we were told to come up with a “Plan C.” My look of confusion as to what to do next might be apparent here. (Photo by Phil Erickson)

On Tuesday night we were to execute the experiment we had designed that afternoon.  Facilities in Alaska, Massachusetts, Peru, Greenland, and Norway would all be operating simultaneously and available for us to use.  Our group had decided to use one of the Norway facilities to study aurora, but when we arrived for our scheduled time we were notified that the radar was having issues and would be unavailable.

This computer terminal allowed us to communicate with the radar technicians at the actual facility as well as visualize our results in real-time. (Photo by Phil Erickson)

Our group had about 2 minutes to throw out “Plan A” as well as “Plan B” that we were advised to come with and come up with a new idea.  We were able to cobble together something on the fly and moved forward anyways because, hey, that’s life.  Our group immediately set to work gathering data and ended up coming out OK, so it turned out not to be an issue.  It pays to be flexible.

For the sake of brevity I’ll finish the rest of the week in another post.  The week at ISR school was long and work-filled, but we found ways to have some fun too.  Until next time…

Day 33 – Launch Window Day 12

The solar wind has been the most cooperative we have seen since we arrived in Svalbard.  Temperatures are dropping so skies are starting to stay clear which has opened up views for some spectacular displays.  Yesterday we woke up to find the sky covered with aurora — we couldn’t get up to the observatory fast enough!

The skies have been alive with activity the past couple days and the skies have been clear enough for us to see — FINALLY! You can see several other domes on top of the observatory at the bottom of the image.

We are here to study a specific type of aurora called “dayside aurora,” so-called because it only occurs on the side of the earth facing the sun.  We are able to see it because we are way up north where the sun don’t shine.  Dayside aurora is often dimmer than the brilliant substorm displays more commonly seen at lower latitudes.

A spectacular substorm display greeted us last night when we walked outside after dinner. The building at the bottom of the image is the University Center at Svalbard (UNIS) where students can come to learn first-hand about substorms, aurora and other geophysical topics.

The dim aurora requires a 30 second exposure to reveal the colors seen above.  I captured the substorm arcs over UNIS using 8 second exposures.

View of the valley below the observatory. In the bottom center you can see Longyearbyen with the fjord behind it. In the bottom right corner you can see one of the radars at EISCAT.

Besides seeing the aurora, the other perk of clear weather is that we can get a better view of the landscape.  We can see Longyearbyen from the observatory as well as the incoherent radar facility down the hill, EISCAT.  EISCAT is one of the most important tools we use in addition to cameras to monitor ionospheric conditions overhead during the launch window.  The crew in charge of the facility was kind enough to show us around.

EISCAT antennas pump megawatts of radio waves into the ionosphere with 32- and 42-meter dishes. The radar measures the emission reflection to determine electron density, electron temperature, ion temperature, and ion drift velocity in the ionosphere.  Here an EISCAT scientists gives us a tour of the power systems responsible for operating the beams. (Photo by Marc Lessard)

Dayside aurora is only possible for a short time each morning and we plan our launch window around it.  Toward the end of the window each day the sun starts to lighten the sky, just barely, even though it never rises over the horizon.  Fortunately for us it never really gets so dark that we can’t see aurora in the sky.

When activity is high enough the aurora remains visible, even the dimmer red aurora that we are interested in for our launch.  The streak on the left is a satellite that passed through the camera frame during the 30 second exposure.

We only caught the tail end of the substorm last night, but the general activity level has continued ever since.

This arc appeared overhead today after we got back from the launch window…at noon! The progression of the waves through the arcs was clearly evident over the span of minutes, sometimes even seconds. This was a bright enough arc that I only needed an 8 second exposure.

Sadly, despite such seeing such fantastic aurora up here we have not yet launched because of the high ground winds at the launch site in Andenes. The launch crew hasn’t even gotten the rocket out of the housing and elevated into launch position.  So now we still wait for the ground weather to cooperate and hope that the conditions overhead continue to cooperate.

Until next time…