Continuously updating desktop background of the earth tf2 validating files every time

Posted by / 28-Oct-2017 17:57

The rotation of the Earth underneath the Station makes its orbit seem to shift westward over time.

Remember, the Station orbits once in about 90 minutes, or about 16 times a day, so 1/16 of a day passes between successive orbits, so the orbital tracks move westward by about 360/16 = 22.5 degrees of longitude each time.

While I watched it this morning, it appeared to go through the camera cycle just twice each orbit, just switching to nadir mode over the terminator (the boundary between day and night).

Here's a sequence of images taken as it was entering orbital sunset near the southernmost latitude it can reach (south of 55 degrees): A sequence of 76 photos taken by the forward-facing camera of the High Definition Earth Viewing Experiment (HDEV) aboard the International Space Station watches ocean, clouds, and ice pass by as the Station moves across the terminator into the shadow of Earth.

When I don't have it set to full-screen mode, I like to watch it at this website, where the page is split among live camera view, a whole-Earth map view showing the Station's orbit, and a Google map showing the location of the Station on the ground.

In the orbit map view, a yellow circle drawn around the Station shows you where its local horizon is on Earth.

There's usually a gray screen for several seconds in between camera views.Its interface is made to be as simple as can be; once powered on and warmed up, HDEV transmits video straight to Earth, live, without recording it onboard.The cameras automatically switch from one to the next.As much as I love the other planets, there's no place as beautiful as home.If the feed is presently not working (gray means it's switching cameras or out of communication range, while black means it's in the dark, because after all the cameras spend half their time on the night side of Earth, just as you and I do), here is an example image I grabbed from the feed this morning, showing the east coast of the United States from Long Island in the north (right) down to the Outer Banks of North Carolina in the south (left).

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I am pretty much the last space blogger on the Internet to write about this, but I couldn't let it go by.

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