Many probably checked websites NASA, trying to expose the "scam" changing palette of Mars. For those who can not spend time on their own investigation, we publish the story leading scientist Mars rover mission, in which he, as a spirit, it is recognized — "The Spirit" (Spirit) sees not as man.
"Spirit sees around him all right perspective — says Jim Bell (Jim Bell), a professor of astronomy at Cornell University (Cornell University) and a leading scholar of the mission. — It takes days to complete the full 360-degree view of the landscape."
"It means — he says — that the combined mosaic can be constructed from images in which the dust in the air, more or less, or just footage shot at different times of the day.
Such changes after the "stitching" end "quilt" with different colors in different parts of the frame. "
But after all the panoramas we see a more or less uniform color of the surrounding countryside?
"Getting the right colors — not an exact science — says Bell. — In creating the view that we would see if you were there — there is artistic, ghostly element."
Of course, scientists have made great efforts to be as accurate as possible.
To do this, they take into account when processing frames from the Mars rovers images taken through telescopes, and shot in the past Mars missions, to create a balanced result, the color of the picture.
Before sending a camera crew to Mars has made more than a hundred thousand pictures in a vacuum chamber that simulated Martian conditions.
Experts have experimented with different levels of light, depending on the angle of the sun or the amount of dust in the air.
They then fine-tuned chamber rovers to properly take into account the temperature changes or anything else that might make a tool change.
In addition, the rover has a calibration target (a kind of sundial with gray, white and multi-colored stripes).
Experts monitored how the colors change in different light and in different weather conditions in the lab, when shooting with different filters.
In addition, the Americans have retained their replicas sundial sent to Mars — as control samples.
"And yet, the images produced — only approximate Martian color" — says Bell.
The fact that many of the pictures, as already mentioned, are made with a set of filters. Some of them work in the infrared or ultraviolet range, not perceived by the eye.
In general, there are 14 different filters.
They provide maximum contrast in order to analyze some of the most interesting geological features in the area of the landing area.
Anyway, the show and science pursue different goals, and not the main problem for NASA — entertainment value panoramic views of Mars.
Battery News, 04.02.2004 10:47