Slight Lack of Focus

Up a tree Over the past few days work has been going on to get the telescope focused and aligned. And to have it stay that way, which is proving to be the challenge. While a small group works on that, others keep themselves busy. […]

Optics box, SIP, and zoo.

Pelicans being fed Since I’m back after a short absence from the field, I should catch up on posting old photos from before I left. The main work on the telescope was assembling the optics box and preparing for focusing/alignment tests. While that goes on, others have been working on gondola assembly, including the local Texans installing their electronics. After a long initial week of work, most of us took some time to visit the Caldwell Zoo nearby. […]

Reassembly and Outside

Jurgen cleans the collimator mirror With the telescope disassembled, inspected and cleaned, it is ready to be put back together again. Then the mirrors get aligned in preparation for focus testing. Reassembly also starts in gondola land. On a nice sunny morning, I take a walk around the highbay. […]

Back in Palestine, for SuperBIT

Telescope-eye view SuperBIT is preparing for a test flight in Palestine, TX. I arrive a day late with the Princeton team. We arrived half a day after the Toronto team, who had unpacked everything. I join the group preparing to test electronics in the Bemco: a big thermal/vacuum chamber. We use it to check that things will survive the cold and almost-vacuum of the stratosphere. Another group unpacks the telescope and disassembles it for a checkup and cleaning. […]

New Cryostat Build

Collection of pieces With Spider still on ice in west Antarctica, construction is well underway on the new cryostat (named Llorothaag aka Lloro aka Thaggie). Last week, Ziggy, Jeff, and I took a trip to Meyer Tool to check on things and discuss some details. […]

The South Pole

The pole and I Once SPIDER finished, I spent a week at Amundsen-Scott South Pole Station. The BICEP3 telescope deployed this year, and I went down to help integrate electronics for which I am the expert. While there, I made a mandatory visit to the two south poles: the geographic South Pole marker (which is updated annually), and the shiny looking ceremonial pole for photo ops. […]

Trails, Boats, and Seals

Roger on the Observation Hill loop One day during SPIDER’s flight, Anne and I walked down to Hut Point to check out the arriving icebreaker. We encountered some seals down there, which also break the ice by chomping holes. They make great huffing noises as the surface and breathe, which made them easy and fun to spot. I liked this so much that I decided to go for a hike every morning, after each night of watching SPIDER. Following the icebreaker, a series of other boats arrived. The main resupply ship arrived just before my return from the South Pole, as did some whales. […]


SPIDER flight path

After a 16.5 day flight, SPIDER has landed. Due to proximity of field camps and fear of drifting over the ocean, we terminated far from McMurdo. Recovering our data will be a fun adventure. But for now it’s time for Sunday brunch. (Map made by John Ruhl) […]

Launch! (Continued)

SPIDER sweater spectators To start the new year, SPIDER launched! After a frantic night and early morning of hurried preparations, we spent much of the day waiting on the weather. Excitement rapidly increased in the afternoon when the winds settled down and the balloon was unboxed and inflated. After pausing to celebrate a successful day of launch operations, we ran inside to start monitoring SPIDER as she ascends. The first day of flight is exhausting, busy, and precious. While we can still see SPIDER, we have fast radio telemetry, which we use to get everything tuned and calibrated. Now SPIDER is happily scanning the sky. […]


Nat With other launches complete, and SPIDER all finished, we’re ready to get together with The Boss for our official pre-flight compatibility check. I get excited because this is the first time I see SPIDER outside (having missed other outings while on night shift). Because this process involves SPIDER sitting outside for a while on a beautiful day, we take lots of photos—including portraits with out soon-to-depart telescope. […]