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ISIS Application Documentation

appjit

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Apply sample/line jitter offsets to the camera pointing of an observation set

Description
Categories
Groups
History

Description

This program requires an observation set of cubes to be initialized with "spiceinit". It will then apply the offsets in the input jitter table, after high pass filtering them, to the low pass filtered rotations in the InstrumentPointing table of the cubes. The low pass filter is achieved by using a least square solution to compute a polynomial fit of the right ascension, declination, and twist angles of the rotation. This should reduce "noisy" pointing data. To restore the original pointing just rerun "spiceinit".

Note that this program should be used on line scan cameras. It will not work on framing cameras.

Categories

Parameter Groups

Files

Name Description
FROMLIST Cubes to update
MASTER Cubes used to initialize pointint fit
JITTERFILE Ascii table of pixel jitter offsets for selected times

Parameters

Name Description
DEGREE Degree of fit
PITCHRATE Optional replacement pitch rate
YAW Optional replacement yaw

Files: FROMLIST

Description

The file specifications for the input cubes all from the same observation. The pointing for these cubes will be updated to correct for jitter and smoothed to remove noise.

Type filename
File Mode input
Filter *.lis

Files: MASTER

Description

The file specification of the cube used to set the apriori pointing fit for all the cubes in the observation FROMLIST.

Type cube
File Mode input
Filter *.cub

Files: JITTERFILE

Description

The file specification of the Ascii table of pixel offsets formatted so that each line lists sampleOffset lineOffset ephemerisTimeSeconds

Type filename
File Mode input
Filter *.txt

Parameters: DEGREE

Description

Enter the degree of the polynomial to fit to the data

Type integer
Default 2

Parameters: PITCHRATE

Description

This value can be used to center the adjacent ccd line errors around zero

Type double
Internal Default No change

Parameters: YAW

Description

This value can be used to center the adjacent ccd sample errors around zero

Type double
Internal Default No change

History

Debbie Cook2008-08-08 Original version
Debbie Cook2009-01-10 Corrected error handling for master file
Debbie Cook2009-08-03 Added new argument to LineScanCameraRotation
Debbie Cook2009-08-05 Added alternate tolerance calculation
Debbie Cook2010-12-23 Upgraded output labels for ckwriter application
Debbie A. Cook2012-07-06 Updated Spice members to be more compliant with Isis coding standards. References #972.
Debbie A. Cook2012-10-25 Fixed Kernels group to include the original kernels listed for the InstrumentPointing kernels after the Table value.