TO_DICK - README 17.02.05


Cassini press release images:
----------------------------

 PIA06175_ring_panorama.tif 

	=  PIA06175.tif   12.12.2004  B=-4, B'=-23.2  alpha=42
           (theta_sun=-40) scale=10.5km/pixel" 

 572_1170_3.tif       

        =  1.11.2004  B=-13.5, B'=-23.5  alpha=112 !c  
           (theta_sun=-120) scale=129km/pixel"


cassini_010104_UT00.jpeg    solar system simulator view
cassini_121204_UT00.jpeg          -"-



Voyager profiles:
-----------------

pps_tau_vs_r.sav      = PPS occultantion profile
vgr_iss.save          = ISS lit and unlit profiles


programs:
---------

useful subroutines:

show_iss.pro          display Voyager PPS-TAU profile and
                      synthetic images made of lit and unlit ISS I/F profiles
		      using the above save-files

show_pps.pro          other variant of -"-
show_pps_iss.pro      other variant of -"-



auxillary subroutines:

ots.pro             - make title
sigrange.pro        - significant range (from astro) 
tile_to_pos.pro     - replaces p.multi (more flexible)
tvplot2.pro         - display bitmaps with axis etc.


main routines for making the plots:

-------------------
* ring_panorama.pro
-------------------

Displays the outer A-ring part of the Cassini panorama image with
a brightness scale that shows the contrast reversal of the
Mimas 5:3 bending wave region (turns from bright to dark 
with increasing ring longitude = from upper left to lower left).
Note also how bright the two surrounding density waves are 
(Prometheus 12:11, Mimas 5:3). 
Also, the after ansa portions appear more diffuse than before the ansa.

The 'ruler' is from the lit side Voyager ISS I/F profile,
made by show_iss.pro

---> ring_panorama.ps


The procedure also shows another (poorer resolution)
Cassini image for comparison (alpha=112)
Here the bending wave appears bright at ansa

---> rings_from_afar.ps



-------------------------------
* deproject_panorama_170205.pro
-------------------------------

Shows 

a) rectified A ring region from the Cassini panorama image
   + three regions in more detail:
b)  upper corner = before ansa
c)  ansa  
d)  lower corner = after ansa	

--> ring_panorama_depro.ps


Here the contrast (same in all frames) is chosen to show asymmetry,
which appears to be strongest near ansa.  The bending wave appear dark
both before b) and after the ansa d) (it had that bright/dark change
at ansa, but in this contrast it is not visible in frame c) Also, what
do you think of the doubling of the Prometheus 12:11 density wave (inside
the Mimas 5:3 bending wave) in d)?


+ the other rectified image

--> rings_from_afar_depro.ps