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Saturn
http://forum.celestialmatters.org/viewtopic.php?f=18&t=584
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Author:  John Van Vliet [ Mon, 07-10-13, 6:59 GMT ]
Post subject:  Saturn

--- Edit on 07-27-2018
sync to MY copy


BUT for some reason ( one that comes out of the SOUTH end of a North facing cow )
Google docs wants to server out MICROSOFT MS office ©™ *.DOCX ©™ formatted files
docx files have formatting that is VERY WRONG and NEVER will work

Because of this the ssc files are NOW zipped

Google drive " Saturn.ssc"
https://drive.google.com/file/d/1LYSp3b ... sp=sharing




you will need a few files
sat360xl.bsp , sat393.bsp , sat368.bsp , sat363-rocks-merge.bsp


you already have de438.bsp

from here
ftp://naif.jpl.nasa.gov/pub/naif/generi ... atellites/

And the files for the rotation models
you already have " pck00010.tpc , naif0012.tls"

a bit of a small warning
The ssc file on my google drive is using my maps , it is just a copy of the section of the file i am using
so you will need to replace then with the map of your choice.

the setup is just like Jupiter with all the moons, and they are a lot of them .
the before and after spice orbits are from JPL Horizons web interface
For Jupiter a practiced with telnet

the moon before and after parts are what takes time to configure and this is where a rather complex ( cross platform) perl script might come in handy

as with Jupiter the moons of Saturn also need a bit of refining
the radius or SemiAxes values need a bit of checking
i used the values in the pck00010.tpc and cpck_rock_21Jan2011_merged.tpc when they were defined.

Author:  John Van Vliet [ Sun, 15-02-15, 8:53 GMT ]
Post subject:  Re: Saturn

just a notice of a update
the spice data has been updated

as was pointed out
There is a difference in the cloud height i set for Titan
i have been trying different settings and 30 dose look fairly good for the texture i am using

i also removed one moon that only had one data point for the orbit
it was an extra that i added a while back

Author:  Limax7 [ Mon, 19-12-16, 21:10 GMT ]
Post subject:  Re: Saturn

When I use this spice I have problems with Janus, Epimetheus and Hyperion models, only when I delete Spice rotation then is fine.
That's strange.

Author:  John Van Vliet [ Tue, 20-12-16, 1:23 GMT ]
Post subject:  Re: Saturn

i have not posted updates to this recently

you might have a issue with the leapsecond file
the current is "naif0012.tls"

make sure that this is used

for Hyperion
Code:
 SpiceRotation
    {
      Kernel      [ "pck00010.tpc"  "naif0012.tls"  ]
      Frame               "IAU_HYPERION"

Author:  Limax7 [ Wed, 21-12-16, 16:29 GMT ]
Post subject:  Re: Saturn

John Van Vliet wrote:
i have not posted updates to this recently

you might have a issue with the leapsecond file
the current is "naif0012.tls"

make sure that this is used

for Hyperion
Code:
 SpiceRotation
    {
      Kernel      [ "pck00010.tpc"  "naif0012.tls"  ]
      Frame               "IAU_HYPERION"


It's not that. Still not work.

Attachments:
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A.png [ 219.8 KiB | Viewed 3827 times ]

Author:  John Van Vliet [ Thu, 26-07-18, 21:18 GMT ]
Post subject:  Re: Saturn

update the planet kernel to the new de438.bsp
ftp://ssd.jpl.nasa.gov/pub/eph/planets/bsp/

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