1·This image was generated the by Mars Orbiter Laser Altimeter, or MOLA, an instrument that was aboard NASA's Mars Global Surveyor.
这张图片是由NASA得火星探测器上的火星轨道激光测高仪(MOLA)拍摄生成的。
2·Laser altimeter not only can precisely measure the target distance, but also extract characteristic information, such as inclination, roughness etc. from its echo signals. So they are applied widely.
激光测高仪不仅可以精确测量目标的距离，还能够从回波信号中提取倾斜度、粗糙度等特征信息，应用十分广泛。
3·Two instruments were involved in producing the map: the camera instrument (specifically the Wide Angle camera) and the Lunar Orbiter Laser Altimeter (Lola) instrument.
制作这份地图利用到两种仪器：相机设备(特别是广角相机)和月球轨道激光测高仪(萝拉)。