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Tiny Tim Release Notes
----------------------

Version 1.0
-----------
January 1992 -
Tiny Tim v1.00 released

February 6, 1992 -
Tiny Tim v1.01 released - added sinc interpolation option

February 14, 1992 -
Tiny Tim v1.02 released - Fixed incorrect FOC f96 rotation value
in pupil.tab file. The old value was obtained from TIM and was
46 degrees, the correct value is 56 degrees. This is also being
fixed in TIM.

February 26, 1992 -
Tiny Tim v1.03 released - Fixed a problem in which the filenames
were too long for the allocated character strings. The strings
are now 150 characters long.

Version 2.0
-----------

May 1992 -
Tiny Tim v2.0 released. Added WFPC II and COSTAR-corrected FOC
f48 and f96 camera options; added table of date-dependent aberrations
which account for mirror moves and desorption; changed the pixel
integration method for more accurate (and often faster) results;
fixed bugs in the obscuration drawing routines; change the names
of some files and deleted Version 1 routines not used in Version 2;
removed code to compute aperture throughput (effects caused by
the position-dependent throughput is supposedly taken care of by
flat fielding).

Version 2.1
-----------

August 1992 -
Version 2.1 uses a convergence-tested sinc interpolation routine
in the pixel integration code. This gets rid of most of the bad
pixels seen in some Version 2.0 PSFs. A bug was fixed in the
FITS writer which caused some occasional errors on the VAX side.
The default aberrations for WFPC now include coma. The numbering
of the WFPC II WFC cameras was changed, and the additional
rotation of the PC II spiders was removed. The default aberration
table for the current HST cameras has been updated to reflect the
recent (August 1992) mirror move. A revised desorption equation
has also be implemented. The image file output code has been
modified to allow faster I/O on the VAX side. The FOC pixel size
was changed to 25 microns to be in better agreement with the pixel
scale on geometrically corrected images.

October 1992 -
WFPC II fixes only. Fixed errors in the WFPC II pupil function.
The spiders were not being drawn for the WFPC II PC camera and
the spiders for the WFPC II WFC cameras were only half the width
they should be. The obscuration shifting code was wrong for
WFPC II. All have been fixed, but the actual orientation of
the WFPC II spiders relative to the OTA is still unknown.
This is relatively insignificant.


Version 2.2
-----------

November 1992 -
Version 2.2 was an experimental version, not released.

Version 2.3
-----------

January 1993 -
Added the August and November 1992 mirror moves to the focus
table, and included an updated desorption curve to aber.c.
An extra vignetting source was added to the Wide Field Cameras
to account for the attenuation of one side of the wings which
occurs uniformly across a chip. This is a definite and unabashed
kludge, and I don't want to hear any complaints about it! This
gets rid of most of the "cratering" in deconvolutions caused by
previous PSFs being too bright in the wings. You can omit this
by setting all of the values in the "Wfc # vignetting params"
line to zero in the parameter file produced by tiny1.

Version 2.4
-----------

August 1993 -
Added FOC refocus. Modified integration routine to reduce errors
caused by FFT noise. Added WFPC2 filter throughputs. Modified
mirror map shifting code. User can now choose to generate a
subsampled PSF even if the detector is not undersampling. All
code was modified to that it would compile using DEC C on Alpha
VMS systems. Did some serious changing of the default aberrations,
based on recent phase retrieval fits. Includes a "fudge factor"
to get the FOC focus to agree with the observed stuff. The code
was modified to run smoothly on DEC Alpha systems.

Version 3.0
-----------

March 1994 -
Added new mirror maps for WFPC and WFPC2 based on on-orbit WFPC2
phase retrieval. Included measured aberrations for WFPC2 and
COSTAR+FOC. Included WFPC2 camera focus offsets and position-
dependent focus due to CCD tilts. Normally sampled WFPC2 PSFs are
now convolved with the average measured pixel scattering function.
Updated COSTAR+FOC pupil rotation and aperture location.

Version 3.0a
------------

April 1994 -
Fixed bug in which memory was not cleared when allocated. Fixed
bug in which the scattering and focus slope flags were switched
inside the software. Adjusted sinc limit radius for wavelengths
greater than 600 nm, getting rid of some artifacts which show up
at longer wavelengths. Added #include stuff for MSDOS. Modified
tiny1 so that it tells the user that the subsampling factor is
along an axis, plus clarified it in the manual.

Version 4.0
-----------

August 1994 -
Use new mirror maps for FOC and FOC+COSTAR by adjusting new map
with secondary mirror map obtained from ground based tests. Revised
default aberrations and desorption curve. Allow WFPC2 and WF/PC-1
PSFs to be computed up to a diameter of 15" for wavelengths longer
than 380 nm and 30" for wavelengths longer than 550 nm. Fixed bug
in Alpha VMS file writer which was slowing down I/O. Modified the
FFT routine which results in speed improvements of up to 40% (thanks
to David Robinson for the suggestions).


Version 4.0a
------------

August 1994 -
Fixed memory leak caused by failure to deallocate temporary array.
Adjusted rotation of WFPC1 PC6 by 0.6 degrees.

Version 4.0b
------------

September 1994 -
Fixed bug in FFT routine which caused severely erroneous results
in PSFs using 1280 grid size. Critically sampled PSF array was
being improperly passed to output routines; fixed error.

Version 4.1
-----------

February 1996 -
Added option to use many wavelengths to sample medium, wide, and
longpass filters for WF/PC-1 and WFPC2. Updated WFPC2 pixel scatter
kernel. Fixed mirror map shifting for COSTAR+FOC. Included
aberrations for each PC camera based on phase retrieval. Fixed
bad WF/PC-1 WF4 aberration file.

Version 4.1N - NICMOS Support - Richard Hook (ST-ECF, rhook@eso.org)
-----------------------------

October 1996 -
preliminary support for producing PSFs for the 2nd generation
NICMOS instrument on HST were added. The options for specifying
the wavelengths and weights were also modified to allow a text
file of wavelengths and weights to be used.

Version 4.2
-----------

November 1996 -
Version with NICMOS support tidied up, tested and better documented.
Support for old mirror maps removed. Added warning message about
convolving subsampled WFPC2 PSFs with the pixel scattering kernel.

Version 4.3
-----------
June 1997 -
Added field- and focus-dependent aberrations to Nicmos; added
determination of Nicmos focus from PAM positions; fixed bug which
crashed the program when generating large Nicmos PSFs; added Nicmos
filter curve files to the distribution.

Version 4.4
-----------
October 1997 -
Added NICMOS 1 & 2 cold mask offsets; reduced number of wavelengths
in NICMOS filter files; changed default aberrations for NICMOS 3
to campaign mode values; minor bug fixes; completely rewrote the
manual

Version 5.0
-----------
November 1999 -
Added STIS imaging modes (field center aberrations); preliminary
ACS support; time-dependent NICMOS aberrations and cold mask
positions; WFPC2 field-dependent aberrations; new choices for
object spectrum includes list of 17 spectra or blackbody; NICMOS
can now use spectra with included filters; halo in WFPC2 F1042M
added; multithreading support added; all filters revised and
optimized; low-weight skipping implemented

Version 5.0a
------------
January 2000 -
Fixed bug that ignored the WMAG value if it was less than 1.0.

Version 5.0b
------------
April 2000 -
Fixed memory leak.

Version 5.0c
------------
May 2000 -
Fixed problem with compilation and execution on HP machines;
fixed problem with pow() function on Decstations.

Version 6.0
-----------
July 2001 -
General : Added flux type to user-defined spectrum table;
added power laws as spectrum options; changed interpolator
to damped sinc
STIS : Added red halo & FUV MAMA charge diffusion halo
ACS : Updated instrument parameters; added HRC red halo & MAMA
charge diffusion; added tiny3 for geometric distortion;
added HRC coronagraph off-spot PSF

Version 6.1
-----------
April 2003 -
General : fixed bugs in FITS output routine; fixed some memory leaks
ACS : Updated aberrations to on-orbit values; added field-dependent
charge diffusion for CCD cameras; updated geometric distortion
coefficients; updated field-dependent aberration coefficients
NICMOS : Updated aberrations and cold mask positions for post-SM3 era

Version 6.1a
-----------
May 2003 - fixed bugs with HRC coronagraphic off-spot PSFs

Version 6.1b (unreleased)
-------------------------
Fixed small bugs in FITS file output; added compilation settings for Mac OS X

Version 6.2
-----------
Jan 2004 - ACS/HRC field dependent aberration and charge diffusion equations
had wrong coefficients - fixed; changed sparcstation to solaris in makefile

Version 6.3
-----------
Added elliptical Gaussian jitter