Printable Version of Topic

Click here to view this topic in its original format

Unmanned Spaceflight.com _ Spirit _ Straight Over Adirondack

Posted by: djellison Feb 9 2004, 10:49 AM

Looks like about a 3m drive due south - followed by a T.I.P.

Brave stuff to go straight over Adirondack - I like their style

Doug

Posted by: DavidVicari Feb 9 2004, 02:19 PM

Cool, Nice to see Spirit rolling again.

I doubted they had enough clearance. But I often get confused about the size of objects because of the narrow field of view of pancam and the wide field of view of the hazcams.

Here is some of the data I've been using to determine the size and distance of objects.

Resolution
All (9) cameras have a resolution of 1024 x 1024

Field of view
Pancam = 16.8 degrees
Navcam = 45 degrees
Hazcam = 127 degrees

Angular Resolution
Pancam = 0.0164 degrees/pixel = 0.286 mrad/pixel
Navcam = 0.0439 degrees/pixel = 0.767 mrad/pixel
Hazcam = 0.124 degreed/pixel = 2.16 mrad/pixel

Geometry
Pancams - 28 cm apart, 1 degree toe-in
Navcams - 20 cm apart
Hazcams - 10 cm apart

Microscopic Imager
Because this camera has a very small focal plane, it's easy to measure sizes. If the object is in focus, it is 30.3 microns/pixel. The entire image is 31 x 31 mm.

Hope this saves people from having to search for all the information themselves.

Posted by: djellison Feb 9 2004, 03:40 PM

Might be usefull to make a set of graphs - that show, for a particular camera, the size of a 1cm, 10cm, 50cm, 1m and 5m objects as a function of distance

Doug