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Old August 7 2012, 01:27 AM   #98
Re: Mars Curiosity Rover... to land 10:31 pm 8/5/2012

There's some individuals out there asking why we don't get real time video. It's not exactly easy having a reliable, high throughput, high bandwidth stream that supports standard definition video, much less HD video over such distances. Unless they're using some miraculous compression schemes I haven't heard of...

In any event, here's a description of the cameras on the rover:

The Mars Science Laboratory (MSL, aka the Curiosity) has two mast cameras, as seen here. One has a fixed 34mm f/8 lens that covers a 15 field of view, covering 1200x1200 pixels on a 1600 by 1200 CCD. The other is a fixed 100mm f/10 lens, with a 5.1 field of view on an identical sensor. You can see some pre-launch images taken with them here.
These cameras won't start showing they're stuff until later this week. They'll transmit color images as they have Bayer Pattern Filter CCDs, and have adjustable filters to capture different wavelengths of light:
Each Mastcam camera head also has a filter wheel, so that images taken by looking through filters covering different, narrow visible and near-infrared wavelengths can be obtained. Filters for the 34 mm Mastcam are (in nanometers): 440, 525, 550, 675, 750, 865, 1034, and 440(neutral density). Filters for the 100 mm Mastcam are (in nanometers): 440, 525, 550, 800, 905, 935, 1035, and 880(neutral density). The neutral density filters are for viewing the Sun. Each filter wheel also includes a visually clear (actually infrared rejection coated) filter for nominal RGB (red, green, blue) imaging using the Bayer Pattern CCD.
The cameras can also capture 720p video, full 360 panoramas, and even use both lenses to capture 3D images. This information won't be broadcast home instantly as the files are pretty large for such a long trip — the Rover has 8GB of onboard storage, and will transmit thumbnails back first, so that NASA can request the images it really wants to see.
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