From Thomas A DOBBINS
®. . . . . . Subject: Re: Mars - June
14, 2003
David:
Registering and combining separate images taken in rather
narrow spectral bands should all but eliminate the effects of atmospheric
prismatic dispersion, rather pronounced given the modest altitude of Mars seen
from mid-northern latitudes like ours. This may account for the superiority of
the resulting R(G)B images versus those obtained with
the webcam used as "single-shot color"
device.
Dobby
(
®. . . . . .Subject:
Atmospheric prismatic dispersion
Dear Masatsugu:
I am pleased to report that a variety of devices (wedge
prisms, Risley prisms) for neutralizing atmospheric
prismatic dispersion are now being offered here in the US, just in time for the
current favorable opposition of Mars.
Please click on "New Products" at:
Kind regards,
(22 June 2003
13:34:11 -0400)
Tom DOBBINS (