Celestia Forums

Posted: **12.09.2010, 07:48**

Does someone knows if a "spice" trajectory of Huygens is available. I did not find any info in the forum. It seems that the "old" add-on"(s) do not fit with the spice data, in particular for the landing.
MBar

Posted: **12.09.2010, 23:32**

A Web search for the keywords
huygens spice
found a recent paper
http://meetingorganizer.copernicus.org/ ... 09-316.pdf
which mentions cpck02Feb2009.tpc
that kernel seems to be available from JPL's NAIF server at
http://naif.jpl.nasa.gov/pub/naif/pds/d ... eb2009.tpc

I dunno if it'll do what you want, though.

Posted: **13.09.2010, 20:24**

Here's my Huygens SSC file (with spice)

Code: Select all

"Huygens" "Sol/Cassini"
{
  Class "spacecraft"
  Mesh "huygens.cmod"
  Radius 0.00135

  Beginning        "1997 10 15 09:27:11.572"
  Ending           "2005 01 14 09:00:00.000"

  Timeline
  [
    {
      Beginning    "1997 10 15 09:27:11.572"
      Ending       "2004 12 25 02:01:58.000"

      OrbitFrame { BodyFixed { Center "Sol/Cassini" } }
      BodyFrame { BodyFixed { Center "Sol/Cassini" } }

      FixedPosition [ -0.0013 0 -0.0002 ]
      FixedRotation { }
    }

    {
      Ending       "2005 01 14 09:00:00.000"

      OrbitFrame { EclipticJ2000 { Center "Sol/Saturn_bary" } }
      BodyFrame { EquatorJ2000 { Center "Sol/Saturn_bary" } }

      Orientation [ 0 0 0 1 ]

      SpiceOrbit {
        Kernel          "050214R_SCPSE_04336_05015.bsp"
        Target          "-150"
        Origin          "6"
        BoundingRadius  6e7
        Period           20
      }

      UniformRotation {
        Inclination 70
        Period 0.01
      }
    }
  ]
}
# ---------------------------------------------------------
"Huygens Landing site" "Sol/Saturn/Titan"
{
   Class            "spacecraft"
   Mesh             "huygens6.cmod"
   Radius                   0.00135

  Beginning        "2005 01 14 09:00:00.000"

  LongLat [ -191 -10.6 0 ]
  Albedo 0.3
}

You'll have to download the 050214R_SCPSE_04336_05015.bsp spice kernel file from NAIF.

Posted: **14.09.2010, 22:48**

Thanks to both of you Selden and Cap Team
Michel B

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