[HN Gopher] NASA's LRO Finds Photo Op as It Zips Past SKorea's D...
       ___________________________________________________________________
        
       NASA's LRO Finds Photo Op as It Zips Past SKorea's Danuri Moon
       Orbiter
        
       Author : wawayanda
       Score  : 22 points
       Date   : 2024-04-07 12:19 UTC (10 hours ago)
        
 (HTM) web link (www.nasa.gov)
 (TXT) w3m dump (www.nasa.gov)
        
       | MadnessASAP wrote:
       | A 300uS shutter speed seems pretty high for a space based ground
       | imaging camera. Does the LRO actually need a shutter speed that
       | high? I'm surprised it's even capable of that.
        
         | passwordoops wrote:
         | This article details why they require such a resolution (1).
         | The first few paragraphs talk about elevation, but then they
         | dive onto the topic
         | 
         | (1) https://www.lroc.asu.edu/images/379
        
           | perihelions wrote:
           | Would it be possible to simply tilt the camera at the same
           | apparent rate as the ground is moving?
           | 
           | edit: Found that the _Apollo_ panoramic camera used physical
           | motion to balance the apparent motion of their target,
           | 
           | https://www.nasa.gov/history/afj/simbaycam/itek-pan-
           | camera.h... ( _" The ITEK Panoramic Camera"_)
           | 
           | - _" (2) the gimbal structure assembly, which rocks the roll
           | frame assembly back and forth to provide for the stereo
           | photography and to compensate for the forward motion of the
           | vehicle,"_
        
         | Sharlin wrote:
         | Well, most consumer cameras are capable of 250ms shutter
         | speeds, and prosumer cameras faster than that. And they're not
         | zipping around their subject at several km/s.
        
       ___________________________________________________________________
       (page generated 2024-04-07 23:01 UTC)