= NOMINALS =

== Description ==

This directory stores the starting solution of an observation that is created from the executable [[make_sumfiles]]. 

Each image has its own "nominal" file stored in the '''NOMINALS''' directory.  These files have the image name with the suffix ".NOM". Nominal files do not update with the use of SPC (the "v 4" command in [[lithos]]), unlike sumfiles. 

All vectors are in body fixed frame.

Nominals include: 
 * '''Image name'''
 * '''Frame reference'''
 * '''SCOBJ''' - Location of the S/C -- [units km] (This can be in inertial frame, or body fix position.)
 * '''SIGMA_VSO''' - Error in S/C position -- [units km]
 * '''Cx, Cy, Cz''' - Vectors of the camera -- [units km]
 * '''SIGMA_PTG''' - Error in camera pointing -- [units rad]

 (!) There are entries for DYNAMICS that list the previous 2 and following 2 images' relative positions.  These are used to condition the S/C position for geometry2
 (./) Is geometry2 another program?  Should there be link to it??

Here is a sample of a nominal file:

{{{
S595057374F1
   -0.3635326241D+00   -0.9250382113D+00   -0.1102195033D+00   BOD_FRAME
    0.3071334125D+00    0.4756036668D+02   -0.3008768662D+01   SCOBJ
    0.1000000000D+01    0.1000000000D+01    0.1000000000D+01   SIGMA_VSO
    0.9685067274D+00    0.3109628683D-02    0.2489679684D+00   CX
    0.2486662018D+00   -0.6285289007D-01   -0.9665477920D+00   CY
    0.1264275161D-01    0.9980179580D+00   -0.6164670642D-01   CZ
    0.1000000000D-02    0.1000000000D-02    0.1000000000D-02   SIGMA_PTG
END FILE
}}}

 (./) Is there something to say about this second example to set it up??

{{attachment:lithos_nominal.jpg||width=600}}

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''(Compiled by KD)''

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