Capturing the Mountian Shadow

A high quality pan-tilt-zoom camera on the roof of the observatory at an altitude of 13,630ft? Just too much fun. I have found myself logging into the camera at sunset to enjoy the view, or keeping the video in the corner of my screen through a Hawaiian blizzard. I have even forwarded images to a local television station when they requested views of a white Christmas in Hawaiʻi. Yes, they used them for the evening news!

Weather Mast
The Keck weather mast with a sonic anemometer at top, MastCam, and the housings for the temperature, humidity and barometric pressure sensors.
This camera can do more… The camera is an Axis Q6044-E dome style security camera. The camera contains a small Linux computer with a huge array of scripting and control options. Combined with a 720p HD camera, reasonably decent optics, and an accurate PTZ mechanism the camera is quite capable.

To make the best of this wonderful toy I need some tools. To that end several Python programs have been written, including a camera scheduler. This program takes a text file with a schedule and captures images at the programmed time and date. All of this was easy to implement in Python, all of the necessary ‘net protocol support is available in the libraries.

The schedule file can contain any number of separate schedules for multiple sequences. At the specified time the program insures the camera is set properly, moves the camera to the correct position and captures the image. Each sequence is saved to a unique directory and given a sequential name suitable for compiling time lapse video. Add a simple GUI to allow images and status to be monitored and the program becomes a very useful tool.

There are now multiple sequences running… Photos of the summit ridge at each sunset, the shadow of the GPS antenna every day at noon, the Kohala mountain every day mid-morning, the TMT construction site several times a day, and more.

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Postcard from the Summit – Sunrise Panorama

Watching sunrise from the summit of Mauna Kea is often the highlight of many visitor’s trip to the island. Any given morning will see a handful of tour vans and rental Jeeps atop the summit ridge awaiting the first glint of sunlight. A small crowd of camera wielding tourists mill about, gazing at the spectacle or huddle in vehicles to avoid the bitter wind.

I do occasionally stop to watch myself. While the telescope operators head for breakfast down below. I stop and join the crowd for a few minutes. Sometimes you just have to take a moment and enjoy the privilege of working in a place like Mauna Kea.

Click on the image for a better appreciation of what it is like to be there… Without the wind.

Sunrise Panorama
Sunrise seen from the summit of Mauna Kea, panorama assembled from ten separate frames.