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Re: Coyote Color Program Updates [message #60364 is a reply to message #60362] Fri, 16 May 2008 09:45 Go to previous messageGo to previous message
wlandsman is currently offline  wlandsman
Messages: 743
Registered: June 2000
Senior Member
On May 16, 11:42 am, Jeremy Bailin <astroco...@gmail.com> wrote:
> On the subject of useful colour tables, does anyone have a good
> "velocity map" colour table? Something that goes from red through
> green to blue, kind of like PRISM, but that becomes significantly non-
> green closer to 128 that goes to strong-red and strong-blue at the
> ends rather than at intermediate indices?
>

You might look at some very old procedures in the solar library
http://sohowww.nascom.nasa.gov/solarsoft/gen/idl/display/
form_vel.pro (to load a velocity table), load_vel.pro (to process an
image for display with a color table), and combine_vel.pro (to display
both intensity and velocity).

From the FORM_VEL documentation:

; When used with LOAD_VEL, positive velocities will be shown in blue,
negative
; velocities in red (or visa-versa), velocities at or near zero will
be
; shown in grey, and missing pixels will be black.

--Wayne

P.S. These procedures have a lot of dependencies so I might just use
them for ideas, if you don't have the solar library already installed.
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