PDS_VERSION_ID = PDS3
RECORD_TYPE = "STREAM"
OBJECT = TEXT
PUBLICATION_DATE = 2006-03-01
NOTE = "Description of the CALIB directory"
END_OBJECT = TEXT
END
CALIB Directory Content
The CALIB folder contains the various database information required to
calibrate OSIRIS images.
The information provided is stored in a format readable by the OSIRIS
calibration pipeline software which may not always follow the PDS standard.
All information is, however, either readable using either a text editor (ascii
format) of a std PDS data file reader (PDS image data and PDS table data).
The CALIB folder has the following structure:
CALIB --|-- ABSCAL : Folder containing the DN/s to W/m2/sr/nm
| for various optical filter combinations
|
|-- ADC : Folder containing the low/high adc
| offset valid for the various amplifier
| combinations
|
|-- BIAS : Folder containing the bias offsets for
| the various operational modes of OSIRIS
|
|-- DISTORSION : Folder containing the optical
| distorsion model parameters for the
| cameras
|
|-- FILTERS : Folder containing the filter
| transmission curves for the various
| optical filters
|
|-- FLATFIELDS : Folder containing the flatfields for
| the various filter combinations
|
|-- MIRRORS : Folder containing the mirror
| reflectivity curves (for both single
| mirror and for full optical path)
|
|-- QE : The CCD quantum efficiency
|
|-- SHUTTER : Folder containing calibration parameters
for the two shutter mechanisms of the
cameras
ABSCAL:
Contains files with the format
<camera>_<model>_AbsCal_V<version>_<Creation Date>.txt
The data files conatins <tag>=<value> lists with the format:
abs<filter>_A contains the absolute calibration constant for
<filter> [(DN/s) / (W/m2/nm/sr)]
abs<filter_A_Err contains an error estimate for abs<filter>_A
abs<filter>_T contains the average transmission coifficient for
<filter>
ADC:
Contains the ADC offset added to the images by the readout electronics for
various readout configuration
The data files conatins <tag>=<value> lists with the format:
adc_offset_a contains the ADC offset for amplifier chain A
adc_offset_b contains the ADC offset for amplifier chain B
adc_offset_ab contains the ADC offset for amplifier chain AB
BIAS:
Contains the BIAS offset added to the images by the readout electronics
for various readout configuration
The data files conatins <tag>=<value> lists with the format:
<WIN Mode>_<Binning>_<amplifier>_SYNC<sync value>
FILTERS:
Contains filter transmission curves for the various optical filter that
can be placed in the optical beam
The folder contains files with the names:
<camera>_<model>_<filter name>_V<version>_<creation date>.tab
the first column contains the wavelength [nm]
the second column contains the transmission [fraction]
the third column contains the reflectivity of the filter surface
FLATFIELDS:
Contains the flatfields required to calibration OSIRIS images
The folder contains files with the names:
<camera>_<model>_<filter number>_V<version>_<creation date>.img
The data files are stored in a data format that can be read with a PDS
image reader
MIRRORS:
Contains the reflectivity curves for the mirrors of OSIRIS
The folder contains files with the names:
<camera>_<model>_MIRROR_V<version>_<creation date>.tab
The data files are tabular text files with:
the first colum containing the wavelength [nm]
the second column containg the single mirror reflectance
the third column containg the integrated mirror responce of the full
optical system
QE:
Contains the quantom efficiency of the OSIRIS CCD's
The folder contains files with the names:
<camera>_<model>_QE_V<version>_<creation date>.img (std calibration file)
or
<camera>_<model>_QE-<temperature>_V<version>_<creation date>.img
(temperature calibration file)
The data files are tabular text files with:
the first colum containing the wavelength [nm]
the second column containg the QE of the CCD at wavelength
the third column containg the reflectivity of the CCD at wavelength
SHUTTER:
Contains parameters describing the transfer function from shutter pulse
index to CCD physical location.
The folder contains files with the names:
<camera>_<model>_SHM-B<blade>_V<version>_<creation date>.txt
The shutter motion transfer function is described as:
d = d0 + L(sin(th0) + sin(n*deg_per_stripe + thZ - th0))
where n is the pulse index and the other parameters are found in the
calibration file as <tag>=<value> data
Name Last modified Size Description
Parent Directory -
abscal/ 15-Dec-2016 09:59 -
adc/ 15-Dec-2016 09:59 -
bias/ 15-Dec-2016 09:59 -
distortion/ 15-Dec-2016 09:59 -
filters/ 15-Dec-2016 09:59 -
flatfields/ 15-Dec-2016 09:59 -
mirrors/ 15-Dec-2016 09:59 -
qe/ 15-Dec-2016 09:59 -
shutter/ 15-Dec-2016 09:59 -
calinfo.txt 14-Nov-2016 16:35 5.6K
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