netcdf W_US-NESDIS-STAR,SATCAL+RAC+GEOLEOIR,GOES13+Imager-MetopA+IASI_C_KNES_20100414120000_demo_03.nc {
 dimensions:
   chan = 4;
   chan_strlen = 11;
   date = UNLIMITED;   // (522 currently)
   validity = 2;
   smooth_window = 29;
 variables:
   float wnc(chan=4);
     :units = "cm^-1";
     :long_name = "monitored instrument channel central wavenumber";
   float beta(chan=4);
     :units = "K";
     :long_name = "radiance to brightness temperature conversion coefficients beta";
   float alpha(chan=4);
     :units = "1";
     :long_name = "radiance to brightness temperature conversion coefficients alpha";
   float a1(chan=4);
     :units = "K";
     :long_name = "radiance to brightness temperature conversion band correction coefficients offset term";
   float a2(chan=4);
     :units = "1";
     :long_name = "radiance to brightness temperature conversion band correction coefficients first-order term";
   float a3(chan=4);
     :units = "1";
     :long_name = "radiance to brightness temperature conversion band correction coefficients second-order term";
   char channel_name(chan=4, chan_strlen=11);
     :long_name = "monitored instrument channel identifier";
   float central_wavelength(chan=4);
     :units = "m";
     :long_name = "monitored instrument channel central wavelength";
     :standard_name = "radiation_wavelength";
   double date(date=522);
     :units = "seconds since 1970-01-01T00:00:00Z";
     :long_name = "optimal date";
     :calendar = "gregorian";
     :ancillary_variables = "validity_period";
     :standard_time = "time";
   double validity_period(date=522, validity=2);
     :units = "seconds since 1970-01-01T00:00:00Z";
     :long_name = "correction validity period start and end time";
     :calendar = "gregorian";
     :standard_name = "time";
   float slope(date=522, chan=4);
     :units = "1";
     :long_name = "correction formula slope";
     :ancillary_variables = "number_of collocations coll_data_available_flag slope_se";
     :valid_min = -2.0f; // float
     :valid_max = 2.0f; // float
   float slope_se(date=522, chan=4);
     :units = "1";
     :long_name = "standard error of correction formula slope";
     :valid_min = -2.0f; // float
     :valid_max = 2.0f; // float
   float offset(date=522, chan=4);
     :units = "mW m-2 sr-1(cm-1)-1";
     :long_name = "correction formula offset";
     :ancillary_variables = "number_of collocations coll_data_available_flag offset_se";
     :valid_min = -200.0f; // float
     :valid_max = 200.0f; // float
   float offset_se(date=522, chan=4);
     :units = "mW m-2 sr-1(cm-1)-1";
     :long_name = "standard error of correction formula offset";
     :valid_min = -200.0f; // float
     :valid_max = 200.0f; // float
   float covariance(date=522, chan=4);
     :units = "mW m-2 sr-1(cm-1)-1";
     :long_name = "covariance of correction slope and offset";
     :valid_min = -200.0f; // float
     :valid_max = 200.0f; // float
   float std_scene_tb(chan=4);
     :units = "K";
     :long_name = "monitored instrument channel brightness temperature of standard scene";
     :valid_min = 230.0f; // float
     :valid_max = 290.0f; // float
   float std_scene_tb_bias(date=522, chan=4);
     :units = "K";
     :long_name = "channel standard scene brightness temperature bias";
     :valid_min = 10.0f; // float
     :valid_max = -10.0f; // float
   float std_scene_tb_bias_se(date=522, chan=4);
     :units = "K";
     :long_name = "std error of channel standard scene brightness temperature bias";
     :valid_min = 10.0f; // float
     :valid_max = -10.0f; // float
   int number_of_collocations(date=522, chan=4);
     :units = "1";
     :long_name = "collocation number for the regression analysis";
     :valid_min = 1; // int
     :valid_max = 2147483647; // int
   short coll_data_available_flag(date=522, smooth_window=29);
     :units = "1";
     :long_name = "collocation data daily available flag";
     :valid_min = 0S; // short
     :valid_max = 1S; // short
     :flag_value = 0S, 1S; // short
     :flag_meanings = "not_available available";
   float hmg_tb_bias(date=522, chan=4);
     :units = "K";
     :long_name = "mean brightness temperature bias over the homogeneous scenes";
     :comment = "Tb bias with respect to reference instrument; homogeneous scene threshold: CoV of FOV and ENV radiances <0.05";
     :valid_min = 10.0f; // float
     :valid_max = -10.0f; // float
   float hmg_tb_bias_se(date=522, chan=4);
     :units = "K";
     :long_name = "std error of average of brightness temperature bias at homogeneous scene";
     :valid_min = 10.0f; // float
     :valid_max = -10.0f; // float

 :Conventions = "CF-1.6";
 :Metadata_Conventions = "Unidata Dataset Discovery v1.0";
 :standard_name_vocabulary = "CF Standard Name Table (Version 19, 22 March 2012)";
 :project = "Global Space-based Inter-Calibration System <http://gsics.wmo.int>";
 :institution = "NOAA Satellite and Information Service (NESDIS)";
 :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.";
 :naming_authority = "gov.noaa.nesdis.gsics";
 :creator_name = "NOAA/NESDIS Center for Satellite Applications and Research GPRC";
 :creator_email = "nesdis.star.gprc@noaa.gov";
 :creator_url = "https://gsics.nesdis.noaa.gov/wiki/GPRC";
 :wmo_data_category = "30";
 :geospatial_lat_units = "degrees_north";
 :geospatial_lon_units = "degrees_east";
 :planck_function_constant_c1 = 1.19104E-5f; // float
 :planck_function_constant_c1_unit = "mW(cm^-1)^-4 m^-2 sr^-1";
 :planck_function_constant_c2 = 1.43877f; // float
 :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 = "teff = ((c2 * center_freq)/alog(1. + (c1 * center_freq^3)/radiance)";
 :radiance_to_brightness_conversion_formula_alternative = "tb = a1 + a2*teff + a3*teff^2";
 :wmo_international_data_subcategory = 5S; // short
 :local_data_subcategory = 1S; // short
 :title = "GOES-13 Imager Infrared Re-analysis Inter-Calibration Correction Coefficients using Metop-A IASI as Reference";
 :summary = "This is the GSICS GEO-LEO inter-calibration re-analysis correction product for the GOES-13 Imager infrared (IR) channels.  The inter-calibration correction coefficients are produced using a weighted linear regression between the collocated radiances of the monitored GEO instrument and the reference LEO instrument over a smooth period, which is  the time in between the validity period.  During a period when there are no calibration events that may change radiometric calibration accuracy, a smoothing period of 29 days is used to ensure reliable linear regression results. The correction coefficients are optimal to apply for the monitored GEO instrument data acquired close to the center of the smoothing period but are also valid for the GOES data acquired during the entire smoothing period. For the GSICS GEO-LEO inter-calibration of GOES Imager IR data, only the night-time collocation data is used to avoid the effect of the GOES midnight calibration anomaly.";
 :keywords = "GSICS, satellite, remote sensing, inter-calibration, reanalysis correction, GEO-LEO-IR, GOES-13 Imager, Metop-A IASI, infrared";
 :references = "https://gsics.nesdis.noaa.gov/wiki/Development/AtbdCentral";
 :geospatial_lat_min = -60.0f; // float
 :geospatial_lat_max = 60.0f; // float
 :geospatial_lon_min = -120.0f; // float
 :geospatial_lon_max = -30.0f; // float
 :processing_level = "demonstration/v3.0.0";
 :window_period = "P29D";
 :monitored_instrument = "GOES-13 Imager";
 :reference_instrument = "Metop-A IASI";
 :date_created = "2012-06-06T19:20:42Z";
 :date_modified = "2012-06-06T19:20:42Z";
 :history = "2012-06-06T19:20:42Z  generate_rac_correctcoeff_geo2iasi.pro demo_v3.0 geo_nameGOS13";
 :id = "W_US-NESDIS-STAR,SATCAL+RAC+GEOLEOIR,GOES13+Imager-MetopA+IASI_C_KNES_20100414120000_demo_03.nc";
 :time_coverage_start = "2010-04-14T12:00:00Z";
 :time_coverage_end = "2011-10-15T12:00:00Z";
}