charles 2009-3-23 11:36
高解析影像及科學實驗相機的火星影像
Mars: The View from HiRISE
[img]http://i9.tinypic.com/2m3s221.jpg[/img]
影像提供: HIROC-LPL, MRO, JPL-Caltech, NASA
[color=navy]Explanation:[/color]
[color=darkred]HiRISE - the High Resolution Imaging Science Experiment - rides on the Mars Reconnaissance Orbiter (MRO)spacecraft just arrived in Mars orbit on March 10. This sharp view of the martian surface from the HiRISE camera includes image data with a full resolution of about 2.5 meters per pixel - recorded from a range of 2,500 kilometers. In the coming months, MRO's orbit will be circularized through repeated passages into Mars' outer atmosphere, a process known as aerobraking, shrinking its orbit to an altitude of only 280 kilometers. At that distance, the HiRISE experiment should be able to image the Red Planet's surface at a resolution of 28 centimeters (11 inches) per pixel. In this first color image, the false colors represent HiRISE's visible and infrared imaging data combined. The picture is nearly 24 kilometers wide and covers an area in the Bosporos Planum region of southern Mars. [/color]
[color=navy]說明:[/color]
[color=darkred]高解析影像及科學實驗相機，是3月10日剛抵達火星的火星探勘軌道船上之儀器。上面這張由這部高解析影像及科學實驗相機所拍攝的清晰火星表面影像，使用了拍攝距離為2,500公里、解析度為每像素2.5公尺的影像數據。在接下來的數個月裡，火星探勘軌道船將以圓形的軌道漸次深入火星的外層大氣，這是一種稱為氣動煞車的過程，將軌道高度縮減到280公里；在這個距離，高解析影像及科學實驗相機將以每像素28公分的解析度拍攝火星表面。上面這張彩色影像使用了假色，來呈現高解析影像及科學實驗相機所記錄的可見光和紅外光影像數據。這個影像的跨幅是24公里，主題是火星南半球的博斯普魯斯高原之一角。 (高解析影像及科學實驗相機 -- High Resolution Imaging Science Experiment; HiRISE. 火星探勘軌道船 -- Mars Reconnaissance Orbiter; MRO, 氣動煞車 -- aerobraking, 博斯普羅斯高原 -- Bosporos Planum)[/color]
[size=2]資料來源: Scientific American
Department of Physics, NCKU[/size][color=white][size=1]
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