Glacier Mission 4

Dec 23

We performed two more glacier missions in the past two days and have explored most of the glacier face. Bill and I had been working on extracting and plotting the Delta T data from the past few days to see how the glacier looks like. The data from each mission consists of approximately 25 million (x,y,z) points that correspond to the sonar returns. Bill plotted up the points in 2D, and we used this to plan today’s glacier mission so that we would cover parts of the glacier face we had missed in the previous missions.

2D model of the glacier face from the Delta T data. The points represent the Delta T renage returns. The grey line was our approximation of the glacier face. Thanks to Bill for the plot.

2D model of the glacier face from the Delta T data. The points represent the Delta T range returns. The grey line was our approximation of the glacier face. Thanks to Bill for the plot.

Today’s mission consisted of scanning the entire glacier face with the Delta T – we had the robot facing the glacier wall at all times while moving sideways. This was a relaxed mission for us since we ran the entire mission as an automated script and all we had to do was sit back and watch the data and the visualizers.

Bill plotted the data from all the missions to get an amazing view of the glacier face and lake bottom near the glacier.

2D model of the glacier face. The data from today's mission was added to the previous model. This shows that we obtained converage of the areas that we had previously missed.

2D model of the glacier face. The data from today's mission was added to the previous model. This shows that we obtained coverage of the areas that we had previously missed.

A plot of the Delta T data showing the lake bottom, lake ice and glacier face. The lake ice is seen on the top in dark blue while the green points at the bottom show the lake bottom. The glacier face does not come all the way to the bottom at all places but floats.

A plot of the Delta T data showing the lake bottom, lake ice and glacier face. The lake ice is seen on the top in dark blue while the green points at the bottom show the lake bottom. The glacier face does not come all the way to the bottom at all places but floats.

We also took a picture of lake bottom with our profiler camera.

Picture of the lake bottom in a shallow region near the glacier taken by the profiler camera. It appears that this is the interface between sand and ice.

Picture of the lake bottom in a shallow region near the glacier taken by the profiler camera. It appears that this is the interface between sand and ice.

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One Response to Glacier Mission 4

  1. […] Below are some pictures from this year. For a complete visualization of the glacier face, see my entry from last year. A view of Taylor glacier seen in the visualizer. This visualizaton is continuously […]

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