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| == Description == This directory stores the starting solution of an observation that is created from the executable [[make_sumfiles]]. |
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| Compiled by KD == 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 of SPC (v 4 command in [[lithos]]), unlike 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. |
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| 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 |
Nominals include: |
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| == An Example of a Nominal == | * '''Image name''' * '''Frame reference '''- Inertial s/c velocity unit vector that defines the downtrack direction. The label is the frame used for SIGMA_VSO. * '''SCOBJ''' - S/C to object vector -- [units km] (This can be in inertial frame, or body fix position.) * '''SIGMA_VSO''' - Error in S/C position -- [units km] * '''Cx, Cy, Cz''' - Camera pointing vectors in the body frame. * '''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 when running GEOMETRY, option 2. Here is a sample of a nominal file: |
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| {{attachment:lithos_nominal.jpg||width="600"}} | |
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| == Another .Nom File Example == | '''Figure 00: Nominal File Illustrating the Starting Solution''' |
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| {{attachment:lithos_nominal.jpg||width=600}} | ---------- ''(Compiled by KD)'' |
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| == 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) |
CategoryDirectories |
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 - Inertial s/c velocity unit vector that defines the downtrack direction. The label is the frame used for SIGMA_VSO.
SCOBJ - S/C to object vector -- [units km] (This can be in inertial frame, or body fix position.)
SIGMA_VSO - Error in S/C position -- [units km]
Cx, Cy, Cz - Camera pointing vectors in the body frame.
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 when running GEOMETRY, option 2.
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
Figure 00: Nominal File Illustrating the Starting Solution
(Compiled by KD)