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Orthographic
graticules |
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These
graticules were prepared by Ben Burrell – a past Assistant Director of
the Mars Section. After being printed (with 50-mm disks) on a transparent
sheet they can be used as overlays to determine the coordinates of markings
on drawings or images, as described in the Director’s paper in J.
Brit. Astron. Assoc., 106, 332–334 (1996). |
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