On Monday 22 February 2010 15:23:35 Ed Pozharski wrote:
> I want to process bunch of frames with extremely short step - i.e. these
> are 0.5degree oscillations but crystal only rotates by 1 degree over
> 1000 frames (I would have kept it at the same orientation if Rigaku
> control software would allow zero step). Denzo can process the frames
> all right, but scalepack chokes on it saying "Floating Exception". I
> don't have much experience with mosflm, and it failed also.
I would not expect any program to deal successfully with this, because
the reflection profile along the rotation axis (successive frames) is
essentially infinite.
Perhaps there is some way you can turn off all scaling of partials?
Or maybe you can set the mosaicity to 0, and hope that no reflections
are treated as being partials?
I suppose what you really want is the change in intensity for a
given integration box on the surface of the detector over time?
But that is not what the normal scaling programs are designed for.
somewhat puzzled,
Ethan
> What I wonder is if this happens because both programs have some bug in
> these unusual conditions or there is something fundamental that prevents
> scaling such data?
>
> Cheers,
>
> Ed.
>
> --
> Edwin Pozharski, PhD, Assistant Professor
> University of Maryland, Baltimore
> ----------------------------------------------
> When the Way is forgotten duty and justice appear;
> Then knowledge and wisdom are born along with hypocrisy.
> When harmonious relationships dissolve then respect and devotion arise;
> When a nation falls to chaos then loyalty and patriotism are born.
> ------------------------------ / Lao Tse /
>
--
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742
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