Header of sgpcsphotaotfiltqaC1.a1.20020704.134347
netcdf sgpcsphotaotfiltqaC1.a1.20020704.134347 { dimensions: time = UNLIMITED ; // (518 currently) string_length = 30 ; variables: int base_time ; base_time:string = " 4-Jul-2002, 13:43:47 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 2002-07-04, 13:43:47 0:00" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2002-07-04, 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_1020(time) ; aot_1020:long_name = "AOT at 1020 nm" ; aot_1020:units = "unitless" ; float aot_870(time) ; aot_870:long_name = "AOT at 870 nm" ; aot_870:units = "unitless" ; float aot_670(time) ; aot_670:long_name = "AOT at 670 nm" ; aot_670:units = "unitless" ; float aot_500(time) ; aot_500:long_name = "AOT at 500 nm" ; aot_500:units = "unitless" ; float aot_440(time) ; aot_440:long_name = "AOT at 440 nm" ; aot_440:units = "unitless" ; float aot_380(time) ; aot_380:long_name = "AOT at 380 nm" ; aot_380:units = "unitless" ; float aot_340(time) ; aot_340:long_name = "AOT at 340 nm" ; aot_340:units = "unitless" ; float aot_1640(time) ; aot_1640:long_name = "AOT at 1640 nm" ; aot_1640:units = "unitless" ; float pwv(time) ; pwv:long_name = "Total precipitable water vapor" ; pwv:units = "cm" ; float TripletVar_1020(time) ; TripletVar_1020:long_name = "Triplet Variability at 1020 nm" ; TripletVar_1020:description = "AOT triplet variability multiplied by 100" ; TripletVar_1020:units = "%" ; float TripletVar_870(time) ; TripletVar_870:long_name = "Triplet Variability at 870 nm" ; TripletVar_870:description = "AOT triplet variability multiplied by 100" ; TripletVar_870:units = "%" ; float TripletVar_670(time) ; TripletVar_670:long_name = "Triplet Variability at 670 nm" ; TripletVar_670:description = "AOT triplet variability multiplied by 100" ; TripletVar_670:units = "%" ; float TripletVar_500(time) ; TripletVar_500:long_name = "Triplet Variability at 500 nm" ; TripletVar_500:description = "AOT triplet variability multiplied by 100" ; TripletVar_500:units = "%" ; float TripletVar_440(time) ; TripletVar_440:long_name = "Triplet Variability at 440 nm" ; TripletVar_440:description = "AOT triplet variability multiplied by 100" ; TripletVar_440:units = "%" ; float TripletVar_380(time) ; TripletVar_380:long_name = "Triplet Variability at 380 nm" ; TripletVar_380:description = "AOT triplet variability multiplied by 100" ; TripletVar_380:units = "%" ; float TripletVar_340(time) ; TripletVar_340:long_name = "Triplet Variability at 340 nm" ; TripletVar_340:description = "AOT triplet variability multiplied by 100" ; TripletVar_340:units = "%" ; float TripletVar_1640(time) ; TripletVar_1640:long_name = "Triplet Variability at 1640 nm" ; TripletVar_1640:description = "AOT triplet variability multiplied by 100" ; TripletVar_1640: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 = "degrees" ; float lat ; lat:long_name = "north latitude" ; lat:units = "degrees" ; float lon ; lon:long_name = "east longitude" ; lon:units = "degrees" ; float alt ; alt:long_name = "altitude" ; alt:units = "meters above Mean Sea Level" ; // global attributes: :Instrument_Name = "Cimel Sunphotometer (CSPHOT)" ; :Data_Description = "Aerosol Optical Thickness (AOT) data, Level 2.0" ; :Reference_URL = "http://www.arm.gov/docs/instruments/static/cspot.html" ; :facility_id = "C1" ; :site_id = "External Data" ; :data_level = "a1" ; :zeb_platform = "sgpcsphotaotfiltqaC1.a1" ; :Input_Platforms = "sgpcsphotaotfiltqaC1.00" ; :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 = "Tue Dec 2 20:59:49 2003" ; :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: process-xdc-csphot-7.1-3 $" ; :input_files = "sgpcsphotaotfiltqaC1.00.200207*.raw.asc" ; :Pickup_Date = "2003-11-14 18:50:59 GMT" ; :Command_Line = "csphot_ingest -i 200207" ; :IDL_Version = "Coded in IDL (sparc / sunos / unix / 5.4)" ; }