NAME: hstjit PURPOSE: (one line) Read and interpret HST jitter information. DESCRIPTION: See Tiny Tim User's Manual, Version 6.3, for details. CATEGORY: Miscellaneous CALLING SEQUENCE: hstjit, image, xsrc_in, ysrc_in, time, deltax, deltay, undistortedx, undistortedy, distortedx, distortedy, instr, path=in_path, DISTORT=distort INPUTS: IMAGE - image name to be fit, must be a string XSRC_IN - x coordinate of object of interest YSRC_IN - y coordinate of object of interest OPTIONAL INPUT PARAMETERS: PATH - String, this is the name of the directory where the data are stored. The actual data directory used is PATH+'/'+image. The default is '' (blank) and the file would be IMAGE which would permit putting a leading path on the root. KEYWORD PARAMETERS: DISTORT - The input x,y are taken to be in an undistorted reference plane and will will be converted to the instrumental (distorted) frame. OUTPUTS: time - intervals of jitter from start of observation [in seconds] deltax - delta x-axis jitter in pixels deltay - delta y-axis jitter in pixels undistortedx - x coordinate with jitter, undistorted reference frame undistortedy - y coordinate with jitter, undistorted reference frame distortedx - x coordinate with jitter, distorted reference frame distortedy - y coordinate with jitter, distorted reference frame instr - record of which instrument was used for this observation rawjitPixelsV2 - raw jitter in pixels, v2 axis rawjitPixelsV3 - raw jitter in pixels, v3 axis COMMON BLOCKS: SIDE EFFECTS: RESTRICTIONS: Assumes jitter file is in the same directory as the image file. PROCEDURE: NOTES: The timestep in the jitter file is one value over 3 seconds Currently does not do distortion for ACS images MODIFICATION HISTORY: Written by S. D. Kern, STScI, September 25, 2007. 2007/10/18, SDK, added support for camera specifics ACS, WFPC2 2007/10/24, SDK, conversion of undistorted/distorted coordinates, output in pixels 2008/04/22, MWB, added support for compressed data files. Fixed bug on reading wrong input quantity from jitter files.