netcdf sgp30twr60mC1.b1.20190424.000000 { dimensions: time = UNLIMITED ; // (29 currently) variables: int base_time ; base_time:string = "2019-04-24 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" ; double time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2019-04-24 00:00:00 0:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2019-04-24 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 = 1797. ; qc_time:delta_t_upper_limit = 1803. ; 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 temp(time) ; temp:long_name = "Air temperature" ; temp:units = "C" ; temp:valid_min = -50.f ; temp:valid_max = 50.f ; temp:resolution = 0.01f ; temp:missing_value = -9999.f ; int qc_temp(time) ; qc_temp:long_name = "Quality check results on field: Air temperature" ; qc_temp:units = "unitless" ; qc_temp:description = "See global attributes for individual bit descriptions." ; float rh(time) ; rh:long_name = "Relative humidity" ; rh:units = "%" ; rh:valid_min = 0.f ; rh:valid_max = 102.f ; rh:resolution = 0.1f ; rh:missing_value = -9999.f ; int qc_rh(time) ; qc_rh:long_name = "Quality check results on field: Relative humidity" ; qc_rh:units = "unitless" ; qc_rh:description = "See global attributes for individual bit descriptions." ; float vap_pres(time) ; vap_pres:long_name = "Vapor pressure" ; vap_pres:units = "kPa" ; vap_pres:valid_min = 0.f ; vap_pres:valid_max = 10.f ; vap_pres:resolution = 0.001f ; vap_pres:missing_value = -9999.f ; int qc_vap_pres(time) ; qc_vap_pres:long_name = "Quality check results on field: Vapor pressure" ; qc_vap_pres:units = "unitless" ; qc_vap_pres:description = "See global attributes for individual bit descriptions." ; float aspirator(time) ; aspirator:long_name = "Aspirator flow status (% of time with proper flow)" ; aspirator:units = "%" ; aspirator:valid_min = 90.f ; aspirator:valid_max = 100.f ; aspirator:resolution = 0.1f ; aspirator:missing_value = -9999.f ; int qc_aspirator(time) ; qc_aspirator:long_name = "Quality check results on field: Aspirator flow status (% of time with proper flow)" ; qc_aspirator:units = "unitless" ; qc_aspirator:description = "See global attributes for individual bit descriptions." ; float temp_std(time) ; temp_std:long_name = "Air temperature, standard deviation" ; temp_std:units = "C" ; temp_std:resolution = 0.01f ; temp_std:missing_value = -9999.f ; float rh_std(time) ; rh_std:long_name = "Relative humidity, standard deviation" ; rh_std:units = "%" ; rh_std:resolution = 0.1f ; rh_std:missing_value = -9999.f ; float vap_pres_std(time) ; vap_pres_std:long_name = "Vapor pressure, standard deviation" ; vap_pres_std:units = "kPa" ; vap_pres_std:resolution = 0.001f ; vap_pres_std:missing_value = -9999.f ; 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 = "twr_ingest -n twr60m -s sgp -f C1" ; :process_version = "ingest-twr-8.4-0.el6" ; :dod_version = "30twr60m-b1-1.1" ; :data_level = "b1" ; :input_source = "/data/collection/sgp/sgptwr60mC1.00/1556060940.icm" ; :site_id = "sgp" ; :facility_id = "C1: Lamont, Oklahoma" ; :datastream = "sgp30twr60mC1.b1" ; :sampling_interval = "1 second" ; :averaging_interval = "30 minutes" ; :serial_number = "N/A" ; :comment = "The time assigned to each data point indicates the end of any period of\n", "averaging of the geophysical data." ; :resolution_description = "The resolution field attributes refer to the number of significant digits relative to the decimal point that should be used in calculations. Using fewer digits might result in greater uncertainty. Using a larger number of digits should have no effect and thus is unnecessary. However, analyses based on differences in values with a larger number of significant digits than indicated could lead to erroneous results or misleading scientific conclusions.\n", "\n", "resolution for lat = 0.001\n", "resolution for lon = 0.001\n", "resolution for alt = 1" ; :sensor_height = "Sensors heights (above base \'alt\'): 60m for temp, rh, vap_pres and aspirator." ; :qc_method = "Standard Mentor QC" ; :qc_standards_version = "1.0" ; :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" ; :history = "created by user dsmgr on machine ruby at 2019-04-24 00:12:01, using ingest-twr-8.4-0.el6" ; }