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KI V² Data Products

Quality assessment (.qa) FileDescription

QA files are ASCIItext files that contain the summary quality assessment metrics for the wide-band, summed spectrometer and individual spectrometer channels for the L-1 V² data for KI. Thefollowing gives an example of a line from a KI QA file:

QA ../../../2004/08:44:24  8.740074  HDC27406  1.2   KI_K1K2  6  WB  78  49  58 64    spec  83  48  58  74    1  79  34  56  89  2  45  35  47  40  3  67  5980  79  4  59  52  58  63

The line consistsof a number of space-delimited fields. The meanings of these fieldsare summarized in the table below. Each line corresponds to a blockaverage of data (typically from 5 to 25 seconds of fringe data, notnecessarily contiguous). A value of NULL indicatesthat the quantity was not calculated. Note that the grade calculationis not yet implemented. See the QAoverview for details on the QA calculations. A # as the leadingcharacter indicates a comment.

field#	content	comments
1	QA	a literal string; each line starts with QA.
2	date	UTC date of the observation (../../../yyyy/hh:mm:ss)
3	time	Mean observation time (decimal UTC hours)
4	target	Target designation (ASCII string)
5	context version	CVS version of context file
6	baseline	Baseline name
7	Num. of bands	Number of bands of QA data (wideband, summed spectrometer and individual spectrometerchannels
8	Band ID	ID for this band. Allowed values are WB, spec and integers for the individual spectrometerchannels
9	Grade	Overall grade for this band.
10	Record percentile	Record-context percentile score for this band.
11	Scan percentile	Scan-context percentile score for this band.
12	Night percentile	Night-context percentile score for this band.
...	Band, grade, record, scan, night	Columns 8 through 12 repeated for each band.