sentences:  The vertical resolution is 40 m, and the horizontal spot resolution is about 100 m. The across track spacing of the measurements at the equator was about 40 km.One measurement was made each second over a 45-minute period during each orbit, giving an along track spacing of 1–2 km.The "Clementine" High-Resolution Camera consisted of a telescope with an image intensifier and a frame-transfer [[Charge-coupled device|CCD]] imager.