netcdf twpmwrret1liljclouC2.s1.20130907.000007 { dimensions: time = UNLIMITED ; // (3675 currently) nlevels = 54 ; nvbias = 20 ; variables: int base_time ; base_time:string = "7-Sep-2013, 00:00:00 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 2013-9-7 00:00:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2013-9-7 00:00:00" ; 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 qc values which should be interpreted as listed:\n", "0 = Good: Data exists and passed all qc tests.\n", "1 = Indeterminate: Data may be bad, further analysis recommended.\n", "2 = Bad: Data has a bad value.\n", "3 = Missing: Data is missing." ; qc_time:delta_t_lower_limit = 15. ; qc_time:delta_t_upper_limit = 38. ; 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 hour(time) ; hour:long_name = "Hour of the day" ; hour:units = "UTC" ; float be_pwv(time) ; be_pwv:long_name = "Precipitable water vapor best-estimate value" ; be_pwv:units = "cm" ; be_pwv:missing_value = -9999.f ; be_pwv:valid_min = -1.f ; be_pwv:valid_max = 10.f ; be_pwv:comment = "Equal to stat2_pwv during periods where phys_pwv has bad quality, and equal to phys_pwv at all other times. If both stat2_pwv and phys_pwv have bad quality be_pwv is set to -9999." ; int qc_be_pwv(time) ; qc_be_pwv:long_name = "Quality check results on field: Precipitable water vapor best-estimate value" ; qc_be_pwv:units = "unitless" ; qc_be_pwv:description = "This field contains qc values which should be interpreted as listed:\n", "0 = Good: Data exists and passed all qc tests.\n", "1 = Indeterminate: Data may be bad, further analysis recommended.\n", "2 = Bad: Data has a bad value.\n", "3 = Missing: Data is missing." ; float be_lwp(time) ; be_lwp:long_name = "Liquid water path best-estimate value" ; be_lwp:units = "g/m^2" ; be_lwp:missing_value = -9999.f ; be_lwp:valid_min = -50.f ; be_lwp:comment = "Equal to stat2_lwp during periods where phys_lwp has bad quality, and equal to phys_lwp at all other times. If both stat2_lwp and phys_lwp have bad quality be_lwp is set to -9999." ; int qc_be_lwp(time) ; qc_be_lwp:long_name = "Quality check results on field: Liquid water path best-estimate value" ; qc_be_lwp:units = "unitless" ; qc_be_lwp:description = "This field contains qc values which should be interpreted as listed:\n", "0 = Good: Data exists and passed all qc tests.\n", "1 = Indeterminate: Data may be bad, further analysis recommended.\n", "2 = Bad: Data has a bad value.\n", "3 = Missing: Data is missing." ; int be_retrieval_flag(time) ; be_retrieval_flag:long_name = "Best-estimate retrieval flag" ; be_retrieval_flag:units = "unitless" ; be_retrieval_flag:comment = "Flag indicating whether be_lwp and be_pwv represents the physical or stat2 retrieval method.\n", " 1 = physical retrieval performed\n", " 2 = stat2 retrieval performed\n", " 0 = be_lwp and be_pwv values were missing, no retrieval performed" ; float tbsky23(time) ; tbsky23:long_name = "Sky brightness temperature at 23.8 GHz" ; tbsky23:units = "K" ; tbsky23:valid_min = 2.73f ; tbsky23:valid_max = 100.f ; tbsky23:missing_value = -9999.f ; int qc_tbsky23(time) ; qc_tbsky23:long_name = "Quality check results on field: Sky brightness temperature at 23.8 GHz" ; qc_tbsky23:units = "unitless" ; qc_tbsky23:description = "This field contains qc values which should be interpreted as listed:\n", "0 = Good: Data exists and passed all qc tests.\n", "1 = Indeterminate: Data may be bad, further analysis recommended.\n", "2 = Bad: Data has a bad value.\n", "3 = Missing: Data is missing." ; float tbsky31(time) ; tbsky31:long_name = "Sky brightness temperature at 31.4 GHz" ; tbsky31:units = "K" ; tbsky31:valid_min = 2.73f ; tbsky31:valid_max = 100.f ; tbsky31:missing_value = -9999.f ; int qc_tbsky31(time) ; qc_tbsky31:long_name = "Quality check results on field: Sky brightness temperature at 31.4 GHz" ; qc_tbsky31:units = "unitless" ; qc_tbsky31:description = "This field contains qc values which should be interpreted as listed:\n", "0 = Good: Data exists and passed all qc tests.\n", "1 = Indeterminate: Data may be bad, further analysis recommended.\n", "2 = Bad: Data has a bad value.\n", "3 = Missing: Data is missing." ; float lat ; lat:long_name = "North latitude" ; lat:units = "degrees_N" ; float lon ; lon:long_name = "East longitude" ; lon:units = "degrees_E" ; float alt ; alt:long_name = "Altitude above mean sea level" ; alt:units = "m" ; // global attributes: :command_line = "mwrret -d 20130907 -f C2 -s twp -n 1 -l 1 -c 300 -p" ; :date_created = "Tue Sep 17 15:25:10 2013 GMT" ; :process_version = "$Id: aer_mwr_retrieval.c,v 1.77 2013/08/08 16:15:02 gaustad vap-mwrret-3.2-7.sol5_10 $" ; :site_id = "twp" ; :facility_id = "C2" ; :ancio_version = "\n", " Ancio library version - $State: ants-ancio-2.11-2.sol5_10 $\n", "Netcdf library version - 3.6.1 of Dec 21 2007 23:41:13 $" ; :data_level = "s1" ; :algorithm_reference_1 = "Turner, D.D., S.A. Clough, J.C. Liljegren, E.E. Clothiaux, K. Cady-Pereira, and K.L. Gaustad, 2007: Retrieving liquid water path and precipitable water vapor from Atmospheric Radiation Measurement (ARM) microwave radiometers. IEEE Trans. Geosci. Remote Sens., 45, 3680-3690, doi:10.1109/TGRS.2007.903" ; :authors = "SA Clough, K Cady-Pereira, JC Liljegren, EE Clothiaux, and DD Turner" ; :qc_standards_version = "1.0" ; :input_datastreams_description = "A string consisting of the datastream(s), datastream version(s), and datastream date (range)." ; :input_datastreams_num = 3 ; :input_datastreams = "twpmwrlosC2.b1 : 2.100000 : 20130907.000007\n", "twpmetC2.b1 : 4.170000 : 20130907.000000\n", "twpvceil25kC2.b1 : 10.300000 : 20130907.000000" ; :tb23_sbias = "Static bias removed from 23.8 GHz channel before retrieval: 0.000000 K" ; :tb31_sbias = "Static bias removed from 31.4 GHz channel before retrieval: 0.000000 K" ; :tb23_vbias = "Variable bias removed from 23.8 GHz channel before retrieval: 0.000000 K" ; :tb31_vbias = "Variable bias removed from 31.4 GHz channel before retrieval: 0.184520 K" ; :vbias31_status = "vbias determined from phys retrieval" ; :tb23_uncertainty = "The 1-sigma uncertainty in the MWR observations at 23.8 GHz: 0.250000 K" ; :tb31_uncertainty = "The 1-sigma uncertainty in the MWR observations at 31.4 GHz: 0.250000 K" ; :vbias_clear_sky_determination_threshold_35ghz_stdev = "0.200000" ; :nominal_noise_diode_temperature = "290.000000 K" ; :sampling_interval = "20.000000 seconds" ; :teflon_window_correction_coef_23 = 0.00164 ; :teflon_window_correction_coef_31 = 0.00217 ; :mean_atmos_radiating_temp_23 = "287.022000 K" ; :mean_atmos_radiating_temp_31 = "285.859000 K" ; :cosmic_background_temperature = "2.750000 K" ; :vapor_retrieval_coefficient_0 = 0.01314 ; :vapor_retrieval_coefficient_1 = 24.31 ; :vapor_retrieval_coefficient_2 = -15.85 ; :liquid_retrieval_coefficient_0 = -0.01429 ; :liquid_retrieval_coefficient_1 = -0.2119 ; :liquid_retrieval_coefficient_2 = 0.6406 ; :physical_retrieval_sample = "The retrieval was performed on every sample" ; :physical_retrieval_comment = "Physical retrievals were not performed on this day." ; :stat2_retrieval_comment = "PWV and LWP are retrieved using a statistical method where the retrieval coefficients utilized are predicted from surface meteorological observations. This retrieval also accounts for the temperature of the cloud liquid water. The monoRTM radiative transfer model from A.E.R., Inc., was used to generate the prediction equations and retrieval coefficients. (LiljRet6a)" ; :averaging_interval = "40 minute window centered on sample time" ; :history = "created by user dsmgr on machine emerald at 17-Sep-2013,15:25:16" ; }