Differences between revisions 1 and 11 (spanning 10 versions)

NOMINALS

Compiled by KD

Description

NOMINALS is a directory that 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. They have the image name with the suffix .NOM. Furthermore, nominals do not update with the use of SPC (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 (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

An Example of a Nominal

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

Some Possible Improvements (kept from powerpoint notes and can probably be deleted)

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)

-  ⇤ ← Revision 1 as of 2015-02-16 11:15:34 → 
  Size: 1199
  Editor: EricPalmer
  Comment:
+   ← Revision 11 as of 2016-02-08 11:43:53 → ⇥
  Size: 1841
  Editor: tcampb
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-Describe NOMINALS here.
+= NOMINALS =
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-NOMINALS is the starting solution of an observation.  Each image has its own NOMINAL file stored in the NOMINALS directory.   They have the image name with the suffix .NOM
+Compiled by KD
 Line 5:
-It includes
+== Description ==

NOMINALS is a directory that 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.   They have the image name with the suffix .NOM. Furthermore, nominals do not update with the use of SPC (v 4 command in [[lithos]]), unlike sumfiles. 

All vectors are in body fixed frame.

Nominals include:
-Line 11:
+Line 17:
- * SIGMA_PTS - Error in camera pointing -- [units rad]
+ * SIGMA_PTG - Error in camera pointing -- [units rad]
-Line 14:
+Line 20:
+== An Example of a Nominal ==
-Line 25:
+Line 32:
+== Another .Nom File Example ==

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

== Some Possible Improvements (kept from powerpoint notes and can probably be deleted) ==

 * 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)