netcdf classic (CDF-1) {
dimensions:
	chan_strlen = 6 ;
	chan = 10 ;
	date = UNLIMITED ; // (1 currently)
	validity = 2 ;
// global attributes:
		:Conventions = "CF-1.6" ;
		:Metadata_Conventions = "Unidata Dataset Discovery v1.0" ;
		:project = "Global Space-based Inter-Calibration System <http://gsics.wmo.int>" ;
		:title = "GSICS Correction Coefficients( NRTC , Himawari-8 AHI vs Aqua AIRS )" ;
		:institution = "JMA" ;
		:id = "W_JP-JMA-MSC,SATCAL+NRTC+GEOLEOIR,Himawari8+AHI-Aqua+AIRS_C_RJTD_20211209000000_demo_01.nc" ;
		:creator_url = "https://www.data.jma.go.jp/mscweb/data/monitoring/calibration.html" ;
		:creator_email = "jma-msc-contact@ml.kishou.go.jp" ;
		:wmo_data_category = 30 ;
		:wmo_international_data_subcategory = 4 ;
		:processing_level = "demonstration/v1.1.0" ;
		:summary = "Coefficients of the GSICS Correction for the infrared channels of a GEO stationary imager using a LEO hyperspectral reference instrument" ;
		:comment = "Regression data period is 15 days." ;
		:references = "ATBD, Unidata NetCDF, Climate Format Conventions, https://www.data.jma.go.jp/mscweb/data/monitoring/gsics/ir/techinfo_geoleoir.html http://physics.nist.gov/cuu/Constants/Preprints/lsa2010.pdf" ;
		:history = "2021-12-12T23:17:46Z created by R script with ncdf library" ;
		:time_coverage_start = "2021-11-25T00:00:00Z" ;
		:time_coverage_end = "2021-12-09T23:59:59Z" ;
		:monitored_instrument = "Himawari-8 AHI" ;
		:reference_instrument = "Aqua AIRS" ;
		:creator_name = "Satellite Application and Analysis Division, Meteorological Satellite Center, Japan Meteorological Agency" ;
		:keywords = "GSICS, satellites, remote sensing, inter-calibration product, GEO-LEO, infrared, near real-time correction" ;
		:date_created = "2021-12-12T23:17:46Z" ;
		:date_modified = "2021-12-12T23:17:46Z" ;
		:standard_name_vocabulary = "CF Standard Name Table (Version 21, 12 January 2013)" ;
		:license = "Information delivered as a GSICS product is generated in accordance with the GSICS principles and practices. GSICS products are public and may be used and redistributed freely. Any publication using GSICS products should acknowledge both GSICS and the relevant data creator organization. Neither the data creator, nor the data publisher, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information." ;
		:geospatial_lat_min = -80.0 ;
		:geospatial_lat_max = 80.0 ;
		:geospatial_lon_min = 60.0 ;
		:geospatial_lon_max = -140.0 ;
		:geospatial_lat_units = "degrees_north" ;
		:geospatial_lon_units = "degrees_east" ;
		:planck_function_constant_c1 = 1.19103997e-05 ;
		:planck_function_constant_c1_unit = "mW(cm^-1)^-4 m^-2 sr^-1" ;
		:planck_function_constant_c2 = 1.43877006 ;
		:planck_function_constant_c2_unit = "K cm" ;
		:brightness_to_radiance_conversion_formula = "radiance = (c1 * wnc^3) / ((exp(c2 * wnc/(alpha * tb + beta))) - 1.)" ;
		:radiance_to_brightness_conversion_formula = "tb = a1 + a2 * ((c2*wnc)/ln(1.+(c1*wnc^3)/radiance)) + a3 * ((c2*wnc)/ln(1.+(c1*wnc^3)/radiance))^2" ;
		:dn_to_radiance_conversion_formula = "radiance = d1 + d2 * dn" ;
		:readMeDocURL = "http://gsics.atmos.umd.edu/pub/Development/AtbdCentral/ATBD_for_JMA_Demonstration_GSICS_Inter-Calibration_of_MTSAT_Himawari-AIRSIASI.docx" ;
		:naming_authority = "jp.go.jma.msc.gsics" ;
		:local_data_subcategory = 1 ;
variables:
	char channel_name(chan, chan_strlen) ;
		channel_name:long_name = "Himawari-8 AHI Channel name" ;
	double date(date) ;
		date:units = "seconds since 1970-01-01T00:00:00Z" ;
		date:long_name = "time of correction evaluation" ;
		date:standard_name = "time" ;
		date:calendar = "gregorian" ;
		date:ancillary_variables = "validity_period" ;
	int number_of_collocations(date, chan) ;
		number_of_collocations:units = "1" ;
		number_of_collocations:long_name = "number of collocations used to calculate correction" ;
		number_of_collocations:valid_min = 1 ;
		number_of_collocations:valid_max = 2147483647 ;
	float central_wavelength(chan) ;
		central_wavelength:units = "m" ;
		central_wavelength:long_name = "Himawari-8 AHI Wavelength of Channel Centre" ;
		central_wavelength:standard_name = "radiation_wavelength" ;
	float offset(date, chan) ;
		offset:units = "mW m-2 sr-1(cm-1)-1" ;
		offset:long_name = "regression offset" ;
		offset:valid_min = -200.0 ;
		offset:valid_max = 200.0 ;
		offset:ancillary_variables = "number_of_collocations" ;
	float offset_se(date, chan) ;
		offset_se:units = "mW m-2 sr-1(cm-1)-1" ;
		offset_se:long_name = "standard error of regression offset" ;
		offset_se:valid_min = -200.0 ;
		offset_se:valid_max = 200.0 ;
	float slope(date, chan) ;
		slope:units = "1" ;
		slope:long_name = "regression slope" ;
		slope:valid_min = -2.0 ;
		slope:valid_max = 2.0 ;
		slope:ancillary_variables = "number_of_collocations" ;
	float slope_se(date, chan) ;
		slope_se:units = "1" ;
		slope_se:long_name = "standard error of regression slope" ;
		slope_se:valid_min = -2.0 ;
		slope_se:valid_max = 2.0 ;
	float covariance(date, chan) ;
		covariance:units = "mW m-2 sr-1(cm-1)-1" ;
		covariance:long_name = "covariance of correction slope and offset" ;
		covariance:valid_min = -200.0 ;
		covariance:valid_max = 200.0 ;
	float std_scene_tb(chan) ;
		std_scene_tb:units = "K" ;
		std_scene_tb:long_name = "brightness temperature of standard scene" ;
		std_scene_tb:valid_min = 230.0 ;
		std_scene_tb:valid_max = 290.0 ;
	float std_scene_tb_bias(date, chan) ;
		std_scene_tb_bias:units = "K" ;
		std_scene_tb_bias:long_name = "brightness temperature bias for standard scene" ;
		std_scene_tb_bias:valid_min = -10.0 ;
		std_scene_tb_bias:valid_max = 10.0 ;
	float std_scene_tb_bias_se(date, chan) ;
		std_scene_tb_bias_se:units = "K" ;
		std_scene_tb_bias_se:long_name = "standard error of brightness temperature bias for standard scene" ;
		std_scene_tb_bias_se:valid_min = -10.0 ;
		std_scene_tb_bias_se:valid_max = 10.0 ;
	double validity_period(date, validity) ;
		validity_period:units = "seconds since 1970-01-01T00:00:00Z" ;
		validity_period:long_name = "correction validity period start and end time" ;
		validity_period:standard_name = "time" ;
		validity_period:calendar = "gregorian" ;
	int correction_info(date) ;
		correction_info:units = "1" ;
		correction_info:missing_value = -1 ;
		correction_info:long_name = "unique reference id selection criteria set" ;
		correction_info:flag_masks = 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 ;
		correction_info:flag_meanings = "smoothing time_of_day lat lon cloudy surface inc_ang azi_ang pol_ang sol_zen_ang sol_azi_ang" ;
		correction_info:valid_min = 0 ;
		correction_info:valid_max = 2047 ;
	float wnc(chan) ;
		wnc:units = "cm^-1" ;
		wnc:long_name = "channel central frequency of channel as wavenumber" ;
	float alpha(chan) ;
		alpha:units = "1" ;
		alpha:long_name = "brightness temperature to radiance conversion coefficient alpha" ;
	float beta(chan) ;
		beta:units = "K" ;
		beta:long_name = "brightness temperature to radiance conversion coefficient beta" ;
	float a1(chan) ;
		a1:units = "K" ;
		a1:long_name = "radiance to brightness temperature conversion band correction coefficients offset term" ;
	float a2(chan) ;
		a2:units = "1" ;
		a2:long_name = "radiance to brightness temperature conversion band correction coefficients first-order term" ;
	float a3(chan) ;
		a3:units = "1" ;
		a3:long_name = "radiance to brightness temperature conversion band correction coefficients second-order term" ;
	float dn_offset(date, chan) ;
		dn_offset:units = "1" ;
		dn_offset:long_name = "regression offset between geo digital counts and leo radiances" ;
		dn_offset:valid_min = -1000.0 ;
		dn_offset:valid_max = 2000.0 ;
		dn_offset:ancillary_variables = "number_of_collocations" ;
	float dn_offset_se(date, chan) ;
		dn_offset_se:units = "1" ;
		dn_offset_se:long_name = "standard error of regression offset between geo digital counts and leo radiances" ;
		dn_offset_se:valid_min = -10.0 ;
		dn_offset_se:valid_max = 10.0 ;
	float dn_slope(date, chan) ;
		dn_slope:units = "(mW m-2 sr-1(cm-1)-1)-1" ;
		dn_slope:long_name = "regression slope between geo digital counts and leo radiances" ;
		dn_slope:valid_min = -2000.0 ;
		dn_slope:valid_max = 1000.0 ;
		dn_slope:ancillary_variables = "number_of_collocations" ;
	float dn_slope_se(date, chan) ;
		dn_slope_se:units = "(mW m-2 sr-1(cm-1)-1)-1" ;
		dn_slope_se:long_name = "standard error of regression slope between geo digital counts and leo radiances" ;
		dn_slope_se:valid_min = -10.0 ;
		dn_slope_se:valid_max = 10.0 ;
	float dn_covariance(date, chan) ;
		dn_covariance:units = "(mW m-2 sr-1(cm-1)-1)-1" ;
		dn_covariance:long_name = "covariance of correction slope and offset between geo digital counts and leo radiances" ;
		dn_covariance:valid_min = -200.0 ;
		dn_covariance:valid_max = 200.0 ;
	float dn_std_scene_tb_bias(date, chan) ;
		dn_std_scene_tb_bias:units = "K" ;
		dn_std_scene_tb_bias:long_name = "brightness temperature bias for standard scene between geo digital counts and leo radiances" ;
		dn_std_scene_tb_bias:valid_min = -10.0 ;
		dn_std_scene_tb_bias:valid_max = 10.0 ;
	float dn_std_scene_tb_bias_se(date, chan) ;
		dn_std_scene_tb_bias_se:units = "K" ;
		dn_std_scene_tb_bias_se:long_name = "standard error of brightness temperature bias for standard scene between geo digital counts and leo radiances" ;
		dn_std_scene_tb_bias_se:valid_min = -10.0 ;
		dn_std_scene_tb_bias_se:valid_max = 10.0 ;
	float d1(chan) ;
		d1:units = "mW m-2 sr-1(cm-1)-1" ;
		d1:long_name = "digital count to radiance conversion coefficients offset term" ;
	float d2(chan) ;
		d2:units = "mW m-2 sr-1(cm-1)-1" ;
		d2:long_name = "digital count to radiance conversion coefficients first-order term" ;
// date: first 1639008000.0, last 1639008000.0, count 1
}