netcdf pvcnfov2chM1.b1.20130701.000000 { dimensions: time = UNLIMITED ; // (46924 currently) variables: int base_time ; base_time:string = "30-Jun-2013,23:02:03 GMT" ; base_time:long_name = "Base time in Epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ; double time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2013-06-30 23:02:03 0:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2013-07-01 00:00:00 0:00" ; int qc_time(time) ; qc_time:long_name = "Quality check results on field: Time offset from midnight" ; qc_time:units = "unitless" ; qc_time:description = "This field contains bit packed values which should be interpreted as listed. No bits set (zero) represents good data." ; qc_time:bit_1_description = "Delta time between current and previous samples is zero." ; qc_time:bit_1_assessment = "Indeterminate" ; qc_time:bit_2_description = "Delta time between current and previous samples is less than the delta_t_lower_limit field attribute." ; qc_time:bit_2_assessment = "Indeterminate" ; qc_time:bit_3_description = "Delta time between current and previous samples is greater than the delta_t_upper_limit field attribute." ; qc_time:bit_3_assessment = "Indeterminate" ; qc_time:delta_t_lower_limit = 1. ; qc_time:delta_t_upper_limit = 1. ; qc_time:prior_sample_flag = 1 ; qc_time:comment = "If the \'prior_sample_flag\' is set the first sample time from a new raw file will be compared against the time just previous to it in the stored data. If it is not set the qc_time value for the first sample will be set to 0." ; float radiance_673nm(time) ; radiance_673nm:long_name = "Calibrated zenith radiance, 673 nm" ; radiance_673nm:units = "W/m^2/nm/sr" ; radiance_673nm:valid_min = 0.f ; radiance_673nm:valid_max = 0.5f ; radiance_673nm:resolution = 0.0001f ; radiance_673nm:missing_value = -9999.f ; int qc_radiance_673nm(time) ; qc_radiance_673nm:long_name = "Quality check results on field: Calibrated zenith radiance, 673 nm" ; qc_radiance_673nm:units = "unitless" ; qc_radiance_673nm:description = "See global attributes for individual bit descriptions." ; float radiance_870nm(time) ; radiance_870nm:long_name = "Calibrated zenith radiance, 870 nm" ; radiance_870nm:units = "W/m^2/nm/sr" ; radiance_870nm:valid_min = 0.f ; radiance_870nm:valid_max = 0.5f ; radiance_870nm:resolution = 0.0001f ; radiance_870nm:missing_value = -9999.f ; int qc_radiance_870nm(time) ; qc_radiance_870nm:long_name = "Quality check results on field: Calibrated zenith radiance, 870 nm" ; qc_radiance_870nm:units = "unitless" ; qc_radiance_870nm:description = "See global attributes for individual bit descriptions." ; float head_temp(time) ; head_temp:long_name = "Detector temperature" ; head_temp:units = "C" ; head_temp:valid_min = 30.f ; head_temp:valid_max = 50.f ; head_temp:resolution = 0.01f ; head_temp:missing_value = -9999.f ; int qc_head_temp(time) ; qc_head_temp:long_name = "Quality check results on field: Detector temperature" ; qc_head_temp:units = "unitless" ; qc_head_temp:description = "See global attributes for individual bit descriptions." ; float tube_temp(time) ; tube_temp:long_name = "Tube temperature" ; tube_temp:units = "C" ; tube_temp:valid_min = 30.f ; tube_temp:valid_max = 50.f ; tube_temp:resolution = 0.01f ; tube_temp:missing_value = -9999.f ; int qc_tube_temp(time) ; qc_tube_temp:long_name = "Quality check results on field: Tube temperature" ; qc_tube_temp:units = "unitless" ; qc_tube_temp:description = "See global attributes for individual bit descriptions." ; float raw_counts_673nm(time) ; raw_counts_673nm:long_name = "Raw counts from instrument before calibration, 673 nm" ; raw_counts_673nm:units = "count" ; raw_counts_673nm:valid_min = 0.f ; raw_counts_673nm:valid_max = 4096.f ; raw_counts_673nm:resolution = 1.f ; raw_counts_673nm:missing_value = -9999.f ; int qc_raw_counts_673nm(time) ; qc_raw_counts_673nm:long_name = "Quality check results on field: Raw counts from instrument before calibration, 673 nm" ; qc_raw_counts_673nm:units = "unitless" ; qc_raw_counts_673nm:description = "See global attributes for individual bit descriptions." ; float raw_counts_870nm(time) ; raw_counts_870nm:long_name = "Raw counts from instrument before calibration, 870 nm" ; raw_counts_870nm:units = "count" ; raw_counts_870nm:valid_min = 0.f ; raw_counts_870nm:valid_max = 4096.f ; raw_counts_870nm:resolution = 1.f ; raw_counts_870nm:missing_value = -9999.f ; int qc_raw_counts_870nm(time) ; qc_raw_counts_870nm:long_name = "Quality check results on field: Raw counts from instrument before calibration, 870 nm" ; qc_raw_counts_870nm:units = "unitless" ; qc_raw_counts_870nm:description = "See global attributes for individual bit descriptions." ; float cosine_solar_zenith_angle(time) ; cosine_solar_zenith_angle:long_name = "Cosine solar zenith angle" ; cosine_solar_zenith_angle:units = "unitless" ; cosine_solar_zenith_angle:valid_min = -1.f ; cosine_solar_zenith_angle:valid_max = 1.f ; cosine_solar_zenith_angle:missing_value = -9999.f ; int qc_cosine_solar_zenith_angle(time) ; qc_cosine_solar_zenith_angle:long_name = "Quality check results on field: Cosine solar zenith angle" ; qc_cosine_solar_zenith_angle:units = "unitless" ; qc_cosine_solar_zenith_angle:description = "See global attributes for individual bit descriptions." ; float offset_673nm ; offset_673nm:long_name = "Offset subtracted from 675nm radiance data" ; offset_673nm:units = "counts" ; offset_673nm:missing_value = -9999.f ; offset_673nm:comment = "Offset value is a rounded average" ; offset_673nm:offset_source = "alltime data used for offset determination" ; float offset_870nm ; offset_870nm:long_name = "Offset subtracted from 870 nm radiance data" ; offset_870nm:units = "counts" ; offset_870nm:missing_value = -9999.f ; offset_870nm:comment = "Offset value is a rounded average" ; offset_870nm:offset_source = "alltime data used for offset determination" ; float lat ; lat:long_name = "North latitude" ; lat:units = "degree_N" ; lat:valid_min = -90.f ; lat:valid_max = 90.f ; float lon ; lon:long_name = "East longitude" ; lon:units = "degree_E" ; lon:valid_min = -180.f ; lon:valid_max = 180.f ; float alt ; alt:long_name = "Altitude above mean sea level" ; alt:units = "m" ; // global attributes: :command_line = "mfrcdl_ingest -n nfov2ch -s pvc -f M1" ; :process_version = "ingest-mfrcdl-10.5-0.el5" ; :ingest_software = "ingest-mfrcdl-10.5-0.el5" ; :dod_version = "nfov2ch-b1-2.0" ; :input_source = "/data/collection/pvc/pvcnfov2chM1.00/1372633320.icm" ; :site_id = "pvc" ; :facility_id = "M1: Cape Cod, Massachusetts" ; :data_level = "b1" ; :sampling_interval = "1 seconds" ; :averaging_interval = "1 seconds" ; :resolution_description = "The resolution field attributes refer to the number of significant\n", "digits relative to the decimal point that should be used in\n", "calculations. Using fewer digits might result in greater uncertainty;\n", "using a larger number of digits should have no effect and thus is\n", "unnecessary. However, analyses based on differences in values with\n", "a larger number of significant digits than indicated could lead to\n", "erroneous results or misleading scientific conclusions.\n", "\n", "resolution for lat= 0.001\n", "resolution for lon = 0.001\n", "resolution for alt = 1" ; :serial_number = "Not specified" ; :comment = "" ; :calibinfo_source = "" ; :nfov2ch1_calib_factor_673 = "0.001878" ; :nfov2ch1_calib_factor_870 = "0.001787" ; :qc_standards_version = "1.0" ; :qc_method = "Standard Mentor QC" ; :qc_comment = "The QC field values are a bit packed representation of true/false values for the tests that may have been performed. A QC value of zero means that none of the tests performed on the value failed.\n", "\n", "The QC field values make use of the internal binary format to store the results of the individual QC tests. This allows the representation of multiple QC states in a single value. If the test associated with a particular bit fails the bit is turned on. Turning on the bit equates to adding the integer value of the failed test to the current value of the field. The QC field\'s value can be interpreted by applying bit logic using bitwise operators, or by examining the QC value\'s integer representation. A QC field\'s integer representation is the sum of the individual integer values of the failed tests. The bit and integer equivalents for the first 5 bits are listed below:\n", "\n", "bit_1 = 00000001 = 0x01 = 2^0 = 1\n", "bit_2 = 00000010 = 0x02 = 2^1 = 2\n", "bit_3 = 00000100 = 0x04 = 2^2 = 4\n", "bit_4 = 00001000 = 0x08 = 2^3 = 8\n", "bit_5 = 00010000 = 0x10 = 2^4 = 16" ; :qc_bit_1_description = "Value is equal to missing_value." ; :qc_bit_1_assessment = "Bad" ; :qc_bit_2_description = "Value is less than the valid_min." ; :qc_bit_2_assessment = "Bad" ; :qc_bit_3_description = "Value is greater than the valid_max." ; :qc_bit_3_assessment = "Bad" ; :qc_bit_4_description = "Difference between current and previous values exceeds valid_delta." ; :qc_bit_4_assessment = "Indeterminate" ; :zeb_platform = "pvcnfov2chM1.b1" ; :history = "created by user dsmgr on machine iron at 1-Jul-2013,0:46:01, using $State: zebra-zeblib-4.23-0.el5 $" ; }