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The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions

机译:火星科学实验室(MSL)桅杆相机和下降成像仪:调查和仪器描述

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摘要

The Mars Science Laboratory Mast camera and Descent Imager investigations were designed, built, and operated by Malin Space Science Systems of San Diego, CA. They share common electronics and focal plane designs but have different optics. There are two Mastcams of dissimilar focal length. The Mastcam‐34 has an f/8, 34 mm focal length lens, and the M‐100 an f/10, 100 mm focal length lens. The M‐34 field of view is about 20° × 15° with an instantaneous field of view (IFOV) of 218 μrad; the M‐100 field of view (FOV) is 6.8° × 5.1° with an IFOV of 74 μrad. The M‐34 can focus from 0.5 m to infinity, and the M‐100 from ~1.6 m to infinity. All three cameras can acquire color images through a Bayer color filter array, and the Mastcams can also acquire images through seven science filters. Images are ≤1600 pixels wide by 1200 pixels tall. The Mastcams, mounted on the ~2 m tall Remote Sensing Mast, have a 360° azimuth and ~180° elevation field of regard. Mars Descent Imager is fixed‐mounted to the bottom left front side of the rover at ~66 cm above the surface. Its fixed focus lens is in focus from ~2 m to infinity, but out of focus at 66 cm. The f/3 lens has a FOV of ~70° by 52° across and along the direction of motion, with an IFOV of 0.76 mrad. All cameras can acquire video at 4 frames/second for full frames or 720p HD at 6 fps. Images can be processed using lossy Joint Photographic Experts Group and predictive lossless compression.
机译:火星科学实验室的桅杆相机和下降成像仪研究是由加利福尼亚州圣地亚哥的马林航天科学系统设计,制造和运行的。它们共享通用的电子器件和焦平面设计,但光学特性不同。有两个焦距不同的Mastcam。 Mastcam‐34具有f / 8、34毫米焦距镜头,而M‐100具有f / 10、100毫米焦距镜头。 M-34视场约为20°×15°,瞬时视场(IFOV)为218μrad; M-100视场(FOV)为6.8°×5.1°,IFOV为74μrad。 M-34的聚焦范围从0.5m到无限远,M-100的聚焦范围从1.6m到无限远。所有三个摄像机都可以通过拜耳彩色滤光片阵列获取彩色图像,而Mastcams也可以通过七个科学滤光片获取图像。图像宽≤1600像素,高1200像素。安装在约2米高的遥感桅杆上的Mastcam具有360°方位角和〜180°仰角视场。 Mars Descent Imager固定安装在流动站上方地面下方约66厘米处的左下方。它的定焦镜头从〜2 m到无限远都可以对焦,但在66 cm处无法对焦。 f / 3镜头在整个运动方向上沿运动方向的视野约为70°x 52°,IFOV为0.76 mrad。所有摄像机均可以4帧/秒的速度获取全帧的视频或720p HD的6fps的视频。可以使用有损的联合图像专家组和可预测的无损压缩来处理图像。

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