NOMINALS

Description

NOMINALS is the starting solution of an observation and are created from the executable make_sumfiles. Each image has its own NOMINAL file stored in the NOMINALS directory. They have the image name with the suffix .NOM. Furthermore, nominals do not update with the use SPC, unlike sumfiles.

Nominals include:

• Image name
• Frame reference
• SCOBJ - Location of the S/C (this can be in inertial frame, or body fix position) -- [units km]
• SIGMA_VSO - Error in S/C position -- [units km]
• Cx, Cy, Cz - Vectors of the camera -- [units rad]
• SIGMA_PTG - Error in camera pointing -- [units rad]
• There are entries for DYNAMICS that list the previous 2 and follow 2 image relative positions. This is used to condition the S/C position for geometry2

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

Another .Nom File Example

• TBD Upgrades for the NOMINAL file:
  • SIGMA_VSO will specify which coord system
    • View-1 (t,n,R) (capital = exact, principal)
    • View-2 (T,n,r)
    • ISO (x,y,z)