netcdf sgptdmaccncollX1.c1.20090531.004608 { dimensions: time = UNLIMITED ; // (20 currently) supersaturation = 120 ; variables: int base_time ; base_time:String = "2009-05-31 00:46:08 GMT" ; base_time:long_name = "Base Time in Epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ; int time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2009-05-31 00:46:08 0:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2009-05-31 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. \n", "No bits set (zero) represents good data. \n", "There is no consistent time interval between samples, although times should increase between samples." ; qc_time:bit_1_description = "The difference between the time of the current sample and the previous sample is 0 (repeated timestamp/duplicate data)." ; qc_time:bit_1_assessment = "Bad" ; qc_time:bit_2_description = "The difference between the time of the current sample and the previous sample is less than 0. " ; qc_time:bit_2_assessment = "Bad" ; qc_time:delta_t_lower_limit = "N/A" ; qc_time:delta_t_upper_limit = "N/A" ; qc_time:prior_sample_flag = "0" ; 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 time will be set to 0." ; float cumulative_CCN(time, supersaturation) ; cumulative_CCN:long_name = "Expected cumulative CCN concentration as a function of supersaturation based on measured size and hygroscopicity distribution" ; cumulative_CCN:units = "1/cm^3" ; cumulative_CCN:valid_min = 0.f ; cumulative_CCN:valid_max = 50000.f ; cumulative_CCN:missing_value = -9999.f ; int qc_cumulative_CCN(time, supersaturation) ; qc_cumulative_CCN:long_name = "Quality check results on field: Expected cumulative CCN concentration as a function of supersaturation based on measured size and hygroscopicity distribution" ; qc_cumulative_CCN:units = "unitless" ; qc_cumulative_CCN:description = "This field contains bit packed values which should be interpreted as listed. No bits set (zero) represents good data." ; qc_cumulative_CCN:bit_1_description = "Valid data value not available in input file, data value in output file set to -9999." ; qc_cumulative_CCN:bit_1_assessment = "Bad" ; qc_cumulative_CCN:bit_2_description = "Data value is less than the valid_min." ; qc_cumulative_CCN:bit_2_assessment = "Bad" ; qc_cumulative_CCN:bit_3_description = "Data value is greater than the valid_max." ; qc_cumulative_CCN:bit_3_assessment = "Bad" ; int aqc1_cumulative_CCN(time) ; aqc1_cumulative_CCN:long_name = "Auxiliary quality check one results on field: Expected cumulative CCN concentration as a function of supersaturation based on measured size distribution" ; aqc1_cumulative_CCN:units = "unitless" ; aqc1_cumulative_CCN:description = "Data quality flags are as follows: \n", " \n", " A value of 0 indicates no flag \n", " A value of 1 indicates that the distribution is somewhat unusual and may be inaccurate. \n", " These distributions are used in the calculated products available in other datastreams. \n", " A value of 2 indicates that the distribution is highly unusual and is likely inaccurate. \n", " These distributions are not used in the calculated products available in other datastreams. \n", " \n", " Data quality flags are determined as follows: \n", " \n", " For each time entry of the size distribution aqc data, the largest value among the four \n", " aqc values is chosen to represent the single aqc value for that time entry. \n", " \n", " (See the corresponding netCDF file, sgptdmasizeC1.b1.20090531.004608.cdf). " ; int aqc2_cumulative_CCN(time) ; aqc2_cumulative_CCN:long_name = "Auxiliary quality check two results on field: Expected cumulative CCN concentration as a function of supersaturation based on measured hygroscopicity distribution" ; aqc2_cumulative_CCN:units = "unitless" ; aqc2_cumulative_CCN:description = "Data quality flags are as follows: \n", " \n", " A value of 0 indicates no flag \n", " A value of 1 indicates that the distribution is somewhat unusual and may be inaccurate. \n", " These distributions are used in the calculated products available in other datastreams. \n", " A value of 2 indicates that the distribution is highly unusual and is likely inaccurate. \n", " These distributions are not used in the calculated products available in other datastreams. \n", " \n", " Data quality flags are determined as follows: \n", " \n", " The single aqc value is the average of the highest of the five hygroscopicity distributions \n", " aqc values (0.025, 0.05, 0.1, 0.2 and 0.4 um; 0.013 and 0.6 um are discarded), rounded to \n", " the nearest integer. \n", " \n", " (See the corresponding netCDF file, sgptdmahygC1.b1.20090531.004608.cdf). " ; float differential_CCN(time, supersaturation) ; differential_CCN:long_name = "Expected differential CCN concentration (dN/dlogSc) as a function of critical supersaturation based on measured size and hygroscopicity distribution" ; differential_CCN:units = "1/cm^3" ; differential_CCN:valid_min = 0.f ; differential_CCN:valid_max = 50000.f ; differential_CCN:missing_value = -9999.f ; int qc_differential_CCN(time, supersaturation) ; qc_differential_CCN:long_name = "Quality check results on field: Expected differential CCN concentration (dN/dlogSc) as a function of critical supersaturation based on measured size and hygroscopicity distribution" ; qc_differential_CCN:units = "unitless" ; qc_differential_CCN:description = "This field contains bit packed values which should be interpreted as listed. No bits set (zero) represents good data." ; qc_differential_CCN:bit_1_description = "Valid data value not available in input file, data value in output file set to -9999." ; qc_differential_CCN:bit_1_assessment = "Bad" ; qc_differential_CCN:bit_2_description = "Data value is less than the valid_min." ; qc_differential_CCN:bit_2_assessment = "Bad" ; qc_differential_CCN:bit_3_description = "Data value is greater than the valid_max." ; qc_differential_CCN:bit_3_assessment = "Bad" ; int aqc1_differential_CCN(time) ; aqc1_differential_CCN:long_name = "Auxiliary quality check results one on field: Expected differential CCN concentration (dN/dlogSc) as a function of critical supersaturation based on measured size distribution" ; aqc1_differential_CCN:units = "unitless" ; aqc1_differential_CCN:description = "Data quality flags are as follows: \n", " \n", " A value of 0 indicates no flag \n", " A value of 1 indicates that the distribution is somewhat unusual and may be inaccurate. \n", " These distributions are used in the calculated products available in other datastreams. \n", " A value of 2 indicates that the distribution is highly unusual and is likely inaccurate. \n", " These distributions are not used in the calculated products available in other datastreams. \n", " \n", " Data quality flags are determined as follows: \n", " \n", " For each time entry of the size distribution aqc data, the largest value among the four \n", " aqc values is chosen to represent the single aqc value for that time entry. \n", " \n", " (See the corresponding netCDF file, sgptdmasizeC1.b1.20090531.004608.cdf). \n", " \n", " (Note: This variable is equivalent to aqc1_cumulative_CCN.) " ; int aqc2_differential_CCN(time) ; aqc2_differential_CCN:long_name = "Auxiliary quality check results two on field: Expected differential CCN concentration (dN/dlogSc) as a function of critical supersaturation based on measured hygroscopicity distribution" ; aqc2_differential_CCN:units = "unitless" ; aqc2_differential_CCN:description = "Data quality flags are as follows: \n", " \n", " A value of 0 indicates no flag \n", " A value of 1 indicates that the distribution is somewhat unusual and may be inaccurate. \n", " These distributions are used in the calculated products available in other datastreams. \n", " A value of 2 indicates that the distribution is highly unusual and is likely inaccurate. \n", " These distributions are not used in the calculated products available in other datastreams. \n", " \n", " Data quality flags are determined as follows: \n", " \n", " The single aqc value is the average of the highest of the five hygroscopicity distributions \n", " aqc values (0.025, 0.05, 0.1, 0.2 and 0.4 um; 0.013 and 0.6 um are discarded), rounded to \n", " the nearest integer. \n", " \n", " (See the corresponding netCDF file, sgptdmahygC1.b1.20090531.004608.cdf). \n", " \n", " (Note: This variable is equivalent to aqc2_cumulative_CCN.) " ; float supersaturation(supersaturation) ; supersaturation:long_name = "Critical Supersaturation" ; supersaturation:units = "%" ; float lat ; lat:long_name = "North latitude" ; lat:units = "degrees_N" ; lat:valid_min = -90.f ; lat:valid_max = 90.f ; float lon ; lon:long_name = "East longitude" ; lon:units = "degrees_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: :Date = "Mon Jan 25 20:22:13 2010" ; :Version = "$State: xdc-tdma_ccn-1.1-1 $" ; :Title = "SGP Tandem Differential Mobility Analyzer from Texas A&M University Department of Atmospheric Sciences" ; :Command_Line = "tdma_ccn_ingest.perl -i 20090531" ; :site_id = "sgp" ; :facility_id = "X1" ; :proc_level = "c1" ; :averaging_interval = "N/A" ; :averaging_interval_explanation = "There is no consistent interval." ; :qc_standards_version = "0.1" ; :zeb_platform = "sgptdmaccncollX1.c1" ; :IDL_version = "IDL (sparc / sunos / unix / 6.2)" ; :input_source = "sgptdmaccncollX1.00.20090531.004608.raw.asc.tar" ; :input_datastreams_descriptions = "A string consisting of the datastream(s), datastream version(s), and datastream date (range)." ; :input_datastreams_num = "1" ; :input_datastreams_names = "sgptdmaccncollX1.00.20090531.004608.raw.asc.tar : xdc-tdma_ccn-1.1-1 : 20090531.004608" ; :history = "Created by tdma_ccn_ingest" ; }