From Mark.Larsen@sdl.usu.edu Tue Nov  8 14:56:00 2005
Date: Tue, 8 Nov 2005 16:55:50 -0700
From: Mark Larsen <Mark.Larsen@sdl.usu.edu>
To: Peter.Eisenhardt@jpl.nasa.gov, amanda K Mainzer <Amanda.K.Mainzer@jpl.nasa.gov>
Cc: Valerie G Duval <Valerie.G.Duval@jpl.nasa.gov>, wright@astro.ucla.edu, Roc Cutri <roc@ipac.caltech.edu>
Subject: PRF's


I put some  PRF's out on docushare in work area > shared > Payload >
Point Spread Functions

 

Modeling details

�                  CODE V model to give the diffraction and design
residuals

�                  SSG scaled the fabrication errors from another
aluminum telescope built recently of comparable size and complexity
to the WISE wavefront error budget

�                  Convolved the resulting PSF with the spacecraft,
scanner, and detector effects to predict a system level PRF

�                  Grid size is 0.0001 inches, which with the 1.35
meter nominal focal length is 0.388 arcseconds

�                  Remember: this is just meant to be representative.
 The actual PRF we get will probably have other effects, including
astigmatism.

�                  Uses the average scan-modulated distortion (2.3
arcseconds)

�                  More details to follow in a memo, as soon as I can
get it reviewed.

 

Regards,

 

-Mark

 

 

Mark F. Larsen, Ph.D.

USU Space Dynamics Laboratory

1695 North Research Parkway

North Logan, UT 84341

(435)797-4337

Mark.larsen@sdl.usu.edu