netcdf sgpaosacsmC1.b2.20161003.001719 { dimensions: time = UNLIMITED ; // (38 currently) bound = 2 ; variables: int base_time ; base_time:string = "2016-10-03 00:00:00 0:00" ; base_time:long_name = "Base time in Epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ; base_time:ancillary_variables = "time_offset" ; double time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2016-10-03 00:00:00 0:00" ; time_offset:ancillary_variables = "base_time" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2016-10-03 00:00:00 0:00" ; time:bounds = "time_bounds" ; time:standard_name = "time" ; double time_bounds(time, bound) ; time_bounds:long_name = "Time cell bounds" ; time_bounds:bound_offsets = -1680., 0. ; float total_organics(time) ; total_organics:long_name = "Mass concentration of organics, ambient aerosol in air" ; total_organics:units = "ug/m^3" ; total_organics:ancillary_variables = "qc_total_organics" ; int qc_total_organics(time) ; qc_total_organics:long_name = "Quality check results on variable: Mass concentration of organics, ambient aerosol in air" ; qc_total_organics:units = "1" ; qc_total_organics:description = "This variable contains bit-packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_total_organics:standard_name = "quality_flag" ; qc_total_organics:flag_method = "bit" ; qc_total_organics:bit_1_description = "Inlet pressure low" ; qc_total_organics:bit_1_assessment = "Bad" ; qc_total_organics:bit_1_comment = "Inlet pressure is low (< 1 Torr), suspected critical orifice clog." ; qc_total_organics:bit_2_description = "Airbeam anomalous" ; qc_total_organics:bit_2_assessment = "Bad" ; qc_total_organics:bit_2_comment = "Airbeam is anomalous. This could include no airbeam, or very sharp changes to the airbeam that make it difficult to correct for the sensitivity." ; qc_total_organics:bit_3_description = "ACSM volume anomalously low" ; qc_total_organics:bit_3_assessment = "Bad" ; qc_total_organics:bit_3_comment = "The total aerosol volume measured by the ACSM is suddenly very low and this is not corroborated by total aerosol volume measured by SMPS and UHSAS. In the absence of airbeam or inlet pressure issues, this likely indicates that the filter switching valve malfunctioned." ; qc_total_organics:bit_4_description = "Troubleshooting, maintenance or calibrations" ; qc_total_organics:bit_4_assessment = "Bad" ; qc_total_organics:bit_4_comment = "Instrument is undergoing troubleshooting, routine maintenance or calibrations." ; qc_total_organics:bit_5_description = "Other issues" ; qc_total_organics:bit_5_assessment = "Bad" ; qc_total_organics:bit_5_comment = "Other issues that result in bad data. Examples include pump failures, collapsed tubing, etc." ; qc_total_organics:bit_6_description = "Air spikes" ; qc_total_organics:bit_6_assessment = "Bad" ; qc_total_organics:bit_6_comment = "Occasionally an air spike produces anomalously high or low mass loadings." ; qc_total_organics:bit_7_description = "ACSM volume anomalously low, but no SMPS to corroborate" ; qc_total_organics:bit_7_assessment = "Indeterminate" ; qc_total_organics:bit_7_comment = "The total aerosol volume measured by the ACSM is suddenly and persistently low, but there is no concurrent SMPS or UHSAS data to fully corroborate whether this is an instrument issue or an unusual atmospheric condition." ; qc_total_organics:bit_8_description = "Other suspect issues" ; qc_total_organics:bit_8_assessment = "Indeterminate" ; qc_total_organics:bit_8_comment = "Other temporary conditions that produce suspect data. Examples include restricted sample flow, AC failure of the AOS, etc." ; qc_total_organics:bit_9_description = "Mentor QC flag" ; qc_total_organics:bit_9_assessment = "Indeterminate" ; qc_total_organics:bit_9_comment = "During data processing, the mentor compares the ACSM volume measured to concurrent measurements in the AOS. This flag is used when such a comparison produces results that are in some way suspect." ; float sulfate(time) ; sulfate:long_name = "Mass concentration of sulfate, ambient aerosol in air" ; sulfate:units = "ug/m^3" ; sulfate:ancillary_variables = "qc_sulfate" ; int qc_sulfate(time) ; qc_sulfate:long_name = "Quality check results on variable: Mass concentration of sulfate, ambient aerosol in air" ; qc_sulfate:units = "1" ; qc_sulfate:description = "This variable contains bit-packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_sulfate:standard_name = "quality_flag" ; qc_sulfate:flag_method = "bit" ; qc_sulfate:bit_1_description = "Inlet pressure low" ; qc_sulfate:bit_1_assessment = "Bad" ; qc_sulfate:bit_1_comment = "Inlet pressure is low (< 1 Torr), suspected critical orifice clog." ; qc_sulfate:bit_2_description = "Airbeam anomalous" ; qc_sulfate:bit_2_assessment = "Bad" ; qc_sulfate:bit_2_comment = "Airbeam is anomalous. This could include no airbeam, or very sharp changes to the airbeam that make it difficult to correct for the sensitivity." ; qc_sulfate:bit_3_description = "ACSM volume anomalously low" ; qc_sulfate:bit_3_assessment = "Bad" ; qc_sulfate:bit_3_comment = "The total aerosol volume measured by the ACSM is suddenly very low and this is not corroborated by total aerosol volume measured by SMPS and UHSAS. In the absence of airbeam or inlet pressure issues, this likely indicates that the filter switching valve malfunctioned." ; qc_sulfate:bit_4_description = "Troubleshooting, maintenance or calibrations" ; qc_sulfate:bit_4_assessment = "Bad" ; qc_sulfate:bit_4_comment = "Instrument is undergoing troubleshooting, routine maintenance or calibrations." ; qc_sulfate:bit_5_description = "Other issues" ; qc_sulfate:bit_5_assessment = "Bad" ; qc_sulfate:bit_5_comment = "Other issues that result in bad data. Examples include pump failures, collapsed tubing, etc." ; qc_sulfate:bit_6_description = "Air spikes" ; qc_sulfate:bit_6_assessment = "Bad" ; qc_sulfate:bit_6_comment = "Occasionally an air spike produces anomalously high or low mass loadings." ; qc_sulfate:bit_7_description = "ACSM volume anomalously low, but no SMPS to corroborate" ; qc_sulfate:bit_7_assessment = "Indeterminate" ; qc_sulfate:bit_7_comment = "The total aerosol volume measured by the ACSM is suddenly and persistently low, but there is no concurrent SMPS or UHSAS data to fully corroborate whether this is an instrument issue or an unusual atmospheric condition." ; qc_sulfate:bit_8_description = "Other suspect issues" ; qc_sulfate:bit_8_assessment = "Indeterminate" ; qc_sulfate:bit_8_comment = "Other temporary conditions that produce suspect data. Examples include restricted sample flow, AC failure of the AOS, etc." ; qc_sulfate:bit_9_description = "Mentor QC flag" ; qc_sulfate:bit_9_assessment = "Indeterminate" ; qc_sulfate:bit_9_comment = "During data processing, the mentor compares the ACSM volume measured to concurrent measurements in the AOS. This flag is used when such a comparison produces results that are in some way suspect." ; float ammonium(time) ; ammonium:long_name = "Mass concentration of ammonium, ambient aerosol in air" ; ammonium:units = "ug/m^3" ; ammonium:ancillary_variables = "qc_ammonium" ; int qc_ammonium(time) ; qc_ammonium:long_name = "Quality check results on variable: Mass concentration of ammonium, ambient aerosol in air" ; qc_ammonium:units = "1" ; qc_ammonium:description = "This variable contains bit-packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_ammonium:standard_name = "quality_flag" ; qc_ammonium:flag_method = "bit" ; qc_ammonium:bit_1_description = "Inlet pressure low" ; qc_ammonium:bit_1_assessment = "Bad" ; qc_ammonium:bit_1_comment = "Inlet pressure is low (< 1 Torr), suspected critical orifice clog." ; qc_ammonium:bit_2_description = "Airbeam anomalous" ; qc_ammonium:bit_2_assessment = "Bad" ; qc_ammonium:bit_2_comment = "Airbeam is anomalous. This could include no airbeam, or very sharp changes to the airbeam that make it difficult to correct for the sensitivity." ; qc_ammonium:bit_3_description = "ACSM volume anomalously low" ; qc_ammonium:bit_3_assessment = "Bad" ; qc_ammonium:bit_3_comment = "The total aerosol volume measured by the ACSM is suddenly very low and this is not corroborated by total aerosol volume measured by SMPS and UHSAS. In the absence of airbeam or inlet pressure issues, this likely indicates that the filter switching valve malfunctioned." ; qc_ammonium:bit_4_description = "Troubleshooting, maintenance or calibrations" ; qc_ammonium:bit_4_assessment = "Bad" ; qc_ammonium:bit_4_comment = "Instrument is undergoing troubleshooting, routine maintenance or calibrations." ; qc_ammonium:bit_5_description = "Other issues" ; qc_ammonium:bit_5_assessment = "Bad" ; qc_ammonium:bit_5_comment = "Other issues that result in bad data. Examples include pump failures, collapsed tubing, etc." ; qc_ammonium:bit_6_description = "Air spikes" ; qc_ammonium:bit_6_assessment = "Bad" ; qc_ammonium:bit_6_comment = "Occasionally an air spike produces anomalously high or low mass loadings." ; qc_ammonium:bit_7_description = "ACSM volume anomalously low, but no SMPS to corroborate" ; qc_ammonium:bit_7_assessment = "Indeterminate" ; qc_ammonium:bit_7_comment = "The total aerosol volume measured by the ACSM is suddenly and persistently low, but there is no concurrent SMPS or UHSAS data to fully corroborate whether this is an instrument issue or an unusual atmospheric condition." ; qc_ammonium:bit_8_description = "Other suspect issues" ; qc_ammonium:bit_8_assessment = "Indeterminate" ; qc_ammonium:bit_8_comment = "Other temporary conditions that produce suspect data. Examples include restricted sample flow, AC failure of the AOS, etc." ; qc_ammonium:bit_9_description = "Mentor QC flag" ; qc_ammonium:bit_9_assessment = "Indeterminate" ; qc_ammonium:bit_9_comment = "During data processing, the mentor compares the ACSM volume measured to concurrent measurements in the AOS. This flag is used when such a comparison produces results that are in some way suspect." ; float nitrate(time) ; nitrate:long_name = "Mass concentration of nitrate, ambient aerosol in air" ; nitrate:units = "ug/m^3" ; nitrate:ancillary_variables = "qc_nitrate" ; int qc_nitrate(time) ; qc_nitrate:long_name = "Quality check results on variable: Mass concentration of nitrate, ambient aerosol in air" ; qc_nitrate:units = "1" ; qc_nitrate:description = "This variable contains bit-packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_nitrate:standard_name = "quality_flag" ; qc_nitrate:flag_method = "bit" ; qc_nitrate:bit_1_description = "Inlet pressure low" ; qc_nitrate:bit_1_assessment = "Bad" ; qc_nitrate:bit_1_comment = "Inlet pressure is low (< 1 Torr), suspected critical orifice clog." ; qc_nitrate:bit_2_description = "Airbeam anomalous" ; qc_nitrate:bit_2_assessment = "Bad" ; qc_nitrate:bit_2_comment = "Airbeam is anomalous. This could include no airbeam, or very sharp changes to the airbeam that make it difficult to correct for the sensitivity." ; qc_nitrate:bit_3_description = "ACSM volume anomalously low" ; qc_nitrate:bit_3_assessment = "Bad" ; qc_nitrate:bit_3_comment = "The total aerosol volume measured by the ACSM is suddenly very low and this is not corroborated by total aerosol volume measured by SMPS and UHSAS. In the absence of airbeam or inlet pressure issues, this likely indicates that the filter switching valve malfunctioned." ; qc_nitrate:bit_4_description = "Troubleshooting, maintenance or calibrations" ; qc_nitrate:bit_4_assessment = "Bad" ; qc_nitrate:bit_4_comment = "Instrument is undergoing troubleshooting, routine maintenance or calibrations." ; qc_nitrate:bit_5_description = "Other issues" ; qc_nitrate:bit_5_assessment = "Bad" ; qc_nitrate:bit_5_comment = "Other issues that result in bad data. Examples include pump failures, collapsed tubing, etc." ; qc_nitrate:bit_6_description = "Air spikes" ; qc_nitrate:bit_6_assessment = "Bad" ; qc_nitrate:bit_6_comment = "Occasionally an air spike produces anomalously high or low mass loadings." ; qc_nitrate:bit_7_description = "ACSM volume anomalously low, but no SMPS to corroborate" ; qc_nitrate:bit_7_assessment = "Indeterminate" ; qc_nitrate:bit_7_comment = "The total aerosol volume measured by the ACSM is suddenly and persistently low, but there is no concurrent SMPS or UHSAS data to fully corroborate whether this is an instrument issue or an unusual atmospheric condition." ; qc_nitrate:bit_8_description = "Other suspect issues" ; qc_nitrate:bit_8_assessment = "Indeterminate" ; qc_nitrate:bit_8_comment = "Other temporary conditions that produce suspect data. Examples include restricted sample flow, AC failure of the AOS, etc." ; qc_nitrate:bit_9_description = "Mentor QC flag" ; qc_nitrate:bit_9_assessment = "Indeterminate" ; qc_nitrate:bit_9_comment = "During data processing, the mentor compares the ACSM volume measured to concurrent measurements in the AOS. This flag is used when such a comparison produces results that are in some way suspect." ; float chloride(time) ; chloride:long_name = "Mass concentration of chloride, ambient aerosol in air" ; chloride:units = "ug/m^3" ; chloride:ancillary_variables = "qc_chloride" ; int qc_chloride(time) ; qc_chloride:long_name = "Quality check results on variable: Mass concentration of chloride, ambient aerosol in air" ; qc_chloride:units = "1" ; qc_chloride:description = "This variable contains bit-packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_chloride:standard_name = "quality_flag" ; qc_chloride:flag_method = "bit" ; qc_chloride:bit_1_description = "Inlet pressure low" ; qc_chloride:bit_1_assessment = "Bad" ; qc_chloride:bit_1_comment = "Inlet pressure is low (< 1 Torr), suspected critical orifice clog." ; qc_chloride:bit_2_description = "Airbeam anomalous" ; qc_chloride:bit_2_assessment = "Bad" ; qc_chloride:bit_2_comment = "Airbeam is anomalous. This could include no airbeam, or very sharp changes to the airbeam that make it difficult to correct for the sensitivity." ; qc_chloride:bit_3_description = "ACSM volume anomalously low" ; qc_chloride:bit_3_assessment = "Bad" ; qc_chloride:bit_3_comment = "The total aerosol volume measured by the ACSM is suddenly very low and this is not corroborated by total aerosol volume measured by SMPS and UHSAS. In the absence of airbeam or inlet pressure issues, this likely indicates that the filter switching valve malfunctioned." ; qc_chloride:bit_4_description = "Troubleshooting, maintenance or calibrations" ; qc_chloride:bit_4_assessment = "Bad" ; qc_chloride:bit_4_comment = "Instrument is undergoing troubleshooting, routine maintenance or calibrations." ; qc_chloride:bit_5_description = "Other issues" ; qc_chloride:bit_5_assessment = "Bad" ; qc_chloride:bit_5_comment = "Other issues that result in bad data. Examples include pump failures, collapsed tubing, etc." ; qc_chloride:bit_6_description = "Air spikes" ; qc_chloride:bit_6_assessment = "Bad" ; qc_chloride:bit_6_comment = "Occasionally an air spike produces anomalously high or low mass loadings." ; qc_chloride:bit_7_description = "ACSM volume anomalously low, but no SMPS to corroborate" ; qc_chloride:bit_7_assessment = "Indeterminate" ; qc_chloride:bit_7_comment = "The total aerosol volume measured by the ACSM is suddenly and persistently low, but there is no concurrent SMPS or UHSAS data to fully corroborate whether this is an instrument issue or an unusual atmospheric condition." ; qc_chloride:bit_8_description = "Other suspect issues" ; qc_chloride:bit_8_assessment = "Indeterminate" ; qc_chloride:bit_8_comment = "Other temporary conditions that produce suspect data. Examples include restricted sample flow, AC failure of the AOS, etc." ; qc_chloride:bit_9_description = "Mentor QC flag" ; qc_chloride:bit_9_assessment = "Indeterminate" ; qc_chloride:bit_9_comment = "During data processing, the mentor compares the ACSM volume measured to concurrent measurements in the AOS. This flag is used when such a comparison produces results that are in some way suspect." ; float airbeam_normalization_factor(time) ; airbeam_normalization_factor:long_name = "Airbeam normalization factor" ; airbeam_normalization_factor:units = "1" ; airbeam_normalization_factor:comment = "This field is a correction factor used to correct for instrument drifts. Ref_N2_signal is assessed based on instrument calibrations." ; airbeam_normalization_factor:computation = "= Ref N2 signal / N2 signal in filtered air" ; float inlet_pressure(time) ; inlet_pressure:long_name = "Inlet pressure, measured" ; inlet_pressure:units = "torr" ; float lat ; lat:long_name = "North latitude" ; lat:units = "degree_N" ; lat:valid_min = -90.f ; lat:valid_max = 90.f ; lat:standard_name = "latitude" ; float lon ; lon:long_name = "East longitude" ; lon:units = "degree_E" ; lon:valid_min = -180.f ; lon:valid_max = 180.f ; lon:standard_name = "longitude" ; float alt ; alt:long_name = "Altitude above mean sea level" ; alt:units = "m" ; alt:standard_name = "altitude" ; // global attributes: :command_line = "aosacsmb2_ingest -s sgp -f C1 -D" ; :Conventions = "ARM-1.3" ; :process_version = "ingest-aosacsmb2-1.0-0.el7" ; :dod_version = "aosacsm-b2-1.0" ; :input_source = "/data/collection/sgp/sgpaosacsmC1.01/ACSM_B_20101118.csv" ; :site_id = "sgp" ; :platform_id = "aosacsm" ; :facility_id = "C1" ; :data_level = "b2" ; :location_description = "Southern Great Plains (SGP), Lamont, Oklahoma" ; :datastream = "sgpaosacsmC1.b2" ; :serial_number = "140-103" ; :sampling_interval = "1 second" ; :averaging_interval = "28 minutes" ; :doi = "10.5439/1762267" ; :averaging_interval_comment = "The average at time t refers to data collected during the previous averaging interval." ; :ACSM = "Aerosol Chemical Speciation Monitor" ; :history = "created by user dsmgr on machine zinc at 2021-06-14 20:02:01, using ingest-aosacsmb2-1.0-0.el7" ; }