netcdf twpcsphotaotfiltC3.a1.20141201.022117 { dimensions: time = UNLIMITED ; // (373 currently) string_length = 30 ; variables: int base_time ; base_time:string = " 1-Dec-2014, 02:21:17 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 2014-12-01, 02:21:17 0:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2014-12-01, 00:00:00 0:00" ; char timeObs(time, string_length) ; timeObs:long_name = "Time of Observation" ; timeObs:units = "string format = dd:mm:yyyy, hh:mm:ss" ; float aot_1640(time) ; aot_1640:long_name = "Aerosol Optical Depth at 1640 nm" ; aot_1640:units = "unitless" ; float aot_1020(time) ; aot_1020:long_name = "Aerosol Optical Depth at 1020 nm" ; aot_1020:units = "unitless" ; float aot_870(time) ; aot_870:long_name = "Aerosol Optical Depth at 870 nm" ; aot_870:units = "unitless" ; float aot_675(time) ; aot_675:long_name = "Aerosol Optical Depth at 675 nm" ; aot_675:units = "unitless" ; float aot_667(time) ; aot_667:long_name = "Aerosol Optical Depth at 667 nm" ; aot_667:units = "unitless" ; float aot_555(time) ; aot_555:long_name = "Aerosol Optical Depth at 555 nm" ; aot_555:units = "unitless" ; float aot_551(time) ; aot_551:long_name = "Aerosol Optical Depth at 551 nm" ; aot_551:units = "unitless" ; float aot_532(time) ; aot_532:long_name = "Aerosol Optical Depth at 532 nm" ; aot_532:units = "unitless" ; float aot_531(time) ; aot_531:long_name = "Aerosol Optical Depth at 531 nm" ; aot_531:units = "unitless" ; float aot_500(time) ; aot_500:long_name = "Aerosol Optical Depth at 500 nm" ; aot_500:units = "unitless" ; float aot_490(time) ; aot_490:long_name = "Aerosol Optical Depth at 490 nm" ; aot_490:units = "unitless" ; float aot_443(time) ; aot_443:long_name = "Aerosol Optical Depth at 443 nm" ; aot_443:units = "unitless" ; float aot_440(time) ; aot_440:long_name = "Aerosol Optical Depth at 440 nm" ; aot_440:units = "unitless" ; float aot_412(time) ; aot_412:long_name = "Aerosol Optical Depth at 412 nm" ; aot_412:units = "unitless" ; float aot_380(time) ; aot_380:long_name = "Aerosol Optical Depth at 380 nm" ; aot_380:units = "unitless" ; float aot_340(time) ; aot_340:long_name = "Aerosol Optical Depth at 340 nm" ; aot_340:units = "unitless" ; float pwv(time) ; pwv:long_name = "Total precipitable water vapor" ; pwv:units = "cm" ; float TripletVar_1640(time) ; TripletVar_1640:long_name = "Triplet Variability at 1640 nm" ; TripletVar_1640:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_1640:units = "%" ; float TripletVar_1020(time) ; TripletVar_1020:long_name = "Triplet Variability at 1020 nm" ; TripletVar_1020:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_1020:units = "%" ; float TripletVar_870(time) ; TripletVar_870:long_name = "Triplet Variability at 870 nm" ; TripletVar_870:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_870:units = "%" ; float TripletVar_675(time) ; TripletVar_675:long_name = "Triplet Variability at 675 nm" ; TripletVar_675:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_675:units = "%" ; float TripletVar_667(time) ; TripletVar_667:long_name = "Triplet Variability at 667 nm" ; TripletVar_667:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_667:units = "%" ; float TripletVar_555(time) ; TripletVar_555:long_name = "Triplet Variability at 555 nm" ; TripletVar_555:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_555:units = "%" ; float TripletVar_551(time) ; TripletVar_551:long_name = "Triplet Variability at 551 nm" ; TripletVar_551:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_551:units = "%" ; float TripletVar_532(time) ; TripletVar_532:long_name = "Triplet Variability at 532 nm" ; TripletVar_532:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_532:units = "%" ; float TripletVar_531(time) ; TripletVar_531:long_name = "Triplet Variability at 531 nm" ; TripletVar_531:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_531:units = "%" ; float TripletVar_500(time) ; TripletVar_500:long_name = "Triplet Variability at 500 nm" ; TripletVar_500:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_500:units = "%" ; float TripletVar_490(time) ; TripletVar_490:long_name = "Triplet Variability at 490 nm" ; TripletVar_490:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_490:units = "%" ; float TripletVar_443(time) ; TripletVar_443:long_name = "Triplet Variability at 443 nm" ; TripletVar_443:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_443:units = "%" ; float TripletVar_440(time) ; TripletVar_440:long_name = "Triplet Variability at 440 nm" ; TripletVar_440:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_440:units = "%" ; float TripletVar_412(time) ; TripletVar_412:long_name = "Triplet Variability at 412 nm" ; TripletVar_412:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_412:units = "%" ; float TripletVar_380(time) ; TripletVar_380:long_name = "Triplet Variability at 380 nm" ; TripletVar_380:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_380:units = "%" ; float TripletVar_340(time) ; TripletVar_340:long_name = "Triplet Variability at 340 nm" ; TripletVar_340:description = "Relative aerosol optical depth variability (max-min)/average in percent" ; TripletVar_340:units = "%" ; float WaterError(time) ; WaterError:long_name = "Water Error" ; WaterError:units = "%" ; float Angstrom440_870(time) ; Angstrom440_870:long_name = "Angstrom Coefficient 440-870" ; Angstrom440_870:units = "unitless" ; float Angstrom380_500(time) ; Angstrom380_500:long_name = "Angstrom Coefficient 380-500" ; Angstrom380_500:units = "unitless" ; float Angstrom440_675(time) ; Angstrom440_675:long_name = "Angstrom Coefficient 440-675" ; Angstrom440_675:units = "unitless" ; float Angstrom500_870(time) ; Angstrom500_870:long_name = "Angstrom Coefficient 500-870" ; Angstrom500_870:units = "unitless" ; float Angstrom340_440(time) ; Angstrom340_440:long_name = "Angstrom Coefficient 340-440" ; Angstrom340_440:units = "unitless" ; float Angstrom440_675_Polar(time) ; Angstrom440_675_Polar:long_name = "Angstrom Coefficient 440-675 Polar" ; Angstrom440_675_Polar:units = "unitless" ; char last_processing_date(time, string_length) ; last_processing_date:long_name = "Last processing date" ; last_processing_date:units = "unitless" ; float zenith(time) ; zenith:long_name = "Solar ZenithAngle" ; zenith:units = "degree" ; 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: :Instrument_Name = "Cimel Sunphotometer (CSPHOT)" ; :Data_Description = "Aerosol Optical Thickness (AOT) data, Level 1.5" ; :Reference_URL = "http://www.arm.gov/instruments/instrument.php?id=csphot" ; :Reference_Data = "Data initially processed by Aeronet, http://aeronet.gsfc.nasa.gov/" ; :Aeronet_Site_Name = "ARM_Darwin" ; :facility_id = "C3" ; :site_id = "External Data" ; :data_level = "a1" ; :zeb_platform = "twpcsphotaotfiltC3.a1" ; :Input_Platforms = "twpcsphotaotfiltC3.00" ; :data_comment = "This data is cloud screened according to the set of criteria described in Smirnov et al, 1998" ; :Screening_criteria = "Screening criteria include restricting the variability in a triplet measurement of AOT taken 30 s apart to less than 0.02, restricting the Angstrom exponent (computed between 440 and 870 nm) to between 0.0 and 3.0 and restricting the variability in AOT at 550 nm during day to less than 3 standard deviations of the daily mean. In addition, data sets with AOT values below 0.005 are removed." ; :Reference = "Smirnov, et al, Cloud Screening and Quality Control Algorithms for the AERONET Data Base, submitted to Remote Sensing of Environment, Sep 1998" ; :data_comment2 = "There is a possibility that these criteria may be more restrictive than necessary for a given application. So caution should be exercised in use of this data. For best results consult unscreened raw data as well." ; :Date = "Sat Jan 3 20:18:36 2015" ; :missing_value = -9999.f ; :missing_value_explanation = "-9999 indicates data or variable was not available in raw file" ; :missing_value1 = -100.f ; :missing_value1_explanation = "-100 indicates a missing data point" ; :Version = "$State: xdc-csphot-7.4-1 $" ; :input_files = "twpcsphotaotfiltC3.00.201412*.raw.asc" ; :Pickup_Date = "2015-01-03 20:18:10 GMT (downloaded with web script), Site Location=ARM_Darwin" ; :Command_Line = "csphot_ingest -i 201412" ; :IDL_Version = "Coded in IDL (sparc / sunos / unix / 6.2)" ; }