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If a data variable has an accompanying quality control variable it will be prepended with 'qc_'. The quality control field is bit-packed with the tests performed listed in the attributes. Each test is described with an attribute name using the format bit\_#\_description and bit\_#\_assessment. The _assessment_ is the instrument mentor or translator catagoization of the severity of the test. For the purposes of understanding quality control variables, the words _test_ and _bit_ can be used interchangeably.
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float direct_normal_broadband(time) ;
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direct_normal_broadband:long_name = "Direct Normal Broadband Irradiance broadband scale applied" ;
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direct_normal_broadband:units = "W/m^2" ;
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direct_normal_broadband:valid_min = 0.f ;
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direct_normal_broadband:valid_max = 5000.f ;
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direct_normal_broadband:missing_value = -9999.f ;
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direct_normal_broadband:corrections = "broadband scale factor applied" ;
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int qc_direct_normal_broadband(time) ;
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qc_direct_normal_broadband:long_name = "Quality check results on field: Direct Normal Broadband Irradiance broadband scale applied" ;
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qc_direct_normal_broadband:units = "unitless" ;
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qc_direct_normal_broadband:description = "This field contains bit packed values which should be interpreted as listed. No bits set (zero) represents good data." ;
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qc_direct_normal_broadband:bit_1_description = "Data value is negative." ;
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qc_direct_normal_broadband:bit_1_assessment = "Bad" ;
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qc_direct_normal_broadband:bit_2_description = "Value is less than the valid_min." ;
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qc_direct_normal_broadband:bit_2_assessment = "Bad" ;
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qc_direct_normal_broadband:bit_3_description = "Value is greater than the valid_max." ;
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qc_direct_normal_broadband:bit_3_assessment = "Bad" ;
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qc_direct_normal_broadband:bit_4_description = "Not used" ;
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qc_direct_normal_broadband:bit_4_assessment = "Bad" ;
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qc_direct_normal_broadband:bit_4_comment = "Test no longer performed." ;
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qc_direct_normal_broadband:bit_5_description = "solar_zenith_angle > 90" ;
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qc_direct_normal_broadband:bit_5_assessment = "Bad" ;
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qc_direct_normal_broadband:bit_6_description = "solar_zenith_angle > 84" ;
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qc_direct_normal_broadband:bit_6_assessment = "Indeterminate" ; |
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\ No newline at end of file |