netcdf sgpvisstpx2dg16minnisX1.c1.20240131.234000 { dimensions: image_y = 425 ; image_x = 700 ; variables: int base_time ; base_time:long_name = "base time in epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 GMT" ; float broadband_longwave_flux(image_y, image_x) ; broadband_longwave_flux:valid_min = 0.f ; broadband_longwave_flux:valid_max = 400.f ; broadband_longwave_flux:long_name = "broadband LW flux" ; broadband_longwave_flux:_FillValue = 3.402823e+38f ; broadband_longwave_flux:units = "W/m^2" ; broadband_longwave_flux:coordinates = "latitude longitude" ; broadband_longwave_flux:comment = "Derived from narrowband data. This is not the official CERES flux." ; broadband_longwave_flux:broadband_comment = "broadband LW flux has been corrected (linear, 5x5 month degree) by normalizing to Ed4 CERES NOAA20 SSF1deg for corresponding month" ; float broadband_shortwave_albedo(image_y, image_x) ; broadband_shortwave_albedo:valid_min = 0.f ; broadband_shortwave_albedo:valid_max = 150.f ; broadband_shortwave_albedo:long_name = "broadband SW albedo" ; broadband_shortwave_albedo:_FillValue = 3.402823e+38f ; broadband_shortwave_albedo:units = "%" ; broadband_shortwave_albedo:coordinates = "latitude longitude" ; broadband_shortwave_albedo:comment = "Derived from narrowband data. This is not the official CERES albedo." ; broadband_shortwave_albedo:broadband_comment = "broadband SW albedo has been corrected (converted to SW flux, linear correction, 5x5 degree) by normalizing to Ed4 CERES NOAA20 SSF1deg for corresponding month, where final albedo constrained to 5% (minimum) to 95% (maximum)" ; float cloud_bottom_height(image_y, image_x) ; cloud_bottom_height:valid_min = -0.1f ; cloud_bottom_height:valid_max = 20.f ; cloud_bottom_height:long_name = "cloud bottom height" ; cloud_bottom_height:_FillValue = 3.402823e+38f ; cloud_bottom_height:units = "km" ; cloud_bottom_height:coordinates = "latitude longitude" ; float cloud_bottom_pressure(image_y, image_x) ; cloud_bottom_pressure:valid_min = 0.f ; cloud_bottom_pressure:valid_max = 1100.f ; cloud_bottom_pressure:long_name = "cloud bottom pressure" ; cloud_bottom_pressure:_FillValue = 3.402823e+38f ; cloud_bottom_pressure:units = "hPa" ; cloud_bottom_pressure:coordinates = "latitude longitude" ; float cloud_bottom_temperature(image_y, image_x) ; cloud_bottom_temperature:valid_min = 160.f ; cloud_bottom_temperature:valid_max = 340.f ; cloud_bottom_temperature:long_name = "cloud bottom temperature" ; cloud_bottom_temperature:_FillValue = 3.402823e+38f ; cloud_bottom_temperature:units = "K" ; cloud_bottom_temperature:coordinates = "latitude longitude" ; float cloud_effective_height(image_y, image_x) ; cloud_effective_height:valid_min = -0.1f ; cloud_effective_height:valid_max = 20.f ; cloud_effective_height:long_name = "cloud effective height" ; cloud_effective_height:_FillValue = 3.402823e+38f ; cloud_effective_height:units = "km" ; cloud_effective_height:coordinates = "latitude longitude" ; float cloud_effective_pressure(image_y, image_x) ; cloud_effective_pressure:valid_min = 0.f ; cloud_effective_pressure:valid_max = 1100.f ; cloud_effective_pressure:long_name = "cloud effective pressure" ; cloud_effective_pressure:_FillValue = 3.402823e+38f ; cloud_effective_pressure:units = "hPa" ; cloud_effective_pressure:coordinates = "latitude longitude" ; float cloud_effective_temperature(image_y, image_x) ; cloud_effective_temperature:valid_min = 160.f ; cloud_effective_temperature:valid_max = 340.f ; cloud_effective_temperature:long_name = "cloud effective temperature" ; cloud_effective_temperature:_FillValue = 3.402823e+38f ; cloud_effective_temperature:units = "K" ; cloud_effective_temperature:coordinates = "latitude longitude" ; float cloud_ir_emittance(image_y, image_x) ; cloud_ir_emittance:valid_min = 0.f ; cloud_ir_emittance:valid_max = 1.5f ; cloud_ir_emittance:long_name = "cloud ir emittance" ; cloud_ir_emittance:_FillValue = 3.402823e+38f ; cloud_ir_emittance:units = "unitless" ; cloud_ir_emittance:coordinates = "latitude longitude" ; float cloud_lwp_iwp(image_y, image_x) ; cloud_lwp_iwp:valid_min = 0.f ; cloud_lwp_iwp:valid_max = 6000.f ; cloud_lwp_iwp:long_name = "Liquid or Ice Water Path" ; cloud_lwp_iwp:_FillValue = 3.402823e+38f ; cloud_lwp_iwp:units = "g/m^2" ; cloud_lwp_iwp:coordinates = "latitude longitude" ; cloud_lwp_iwp:NOTE_1 = "If phase = water, this is Liquid Water Path " ; cloud_lwp_iwp:NOTE_2 = "If phase = ice, this is Ice Water Path " ; float cloud_particle_size(image_y, image_x) ; cloud_particle_size:valid_min = 0.f ; cloud_particle_size:valid_max = 150.f ; cloud_particle_size:long_name = "effective particle radius or diameter" ; cloud_particle_size:_FillValue = 3.402823e+38f ; cloud_particle_size:coordinates = "latitude longitude" ; cloud_particle_size:NOTE_1 = "If phase = water, this parameter is radius " ; cloud_particle_size:NOTE_2 = "If phase = ice, this parameter is diameter" ; cloud_particle_size:units = "um" ; int cloud_phase(image_y, image_x) ; cloud_phase:valid_min = 0 ; cloud_phase:valid_max = 13 ; cloud_phase:long_name = "cloud phase" ; cloud_phase:value_0 = "snow" ; cloud_phase:value_1 = "water" ; cloud_phase:value_2 = "ice" ; cloud_phase:value_3 = "no retrieval" ; cloud_phase:value_4 = "clear" ; cloud_phase:value_5 = "bad data" ; cloud_phase:value_6 = "suspected water" ; cloud_phase:value_7 = "suspected ice" ; cloud_phase:value_13 = "cleaned data" ; cloud_phase:coordinates = "latitude longitude" ; cloud_phase:_FillValue = 2147483647 ; float cloud_top_height(image_y, image_x) ; cloud_top_height:valid_min = -0.1f ; cloud_top_height:valid_max = 20.f ; cloud_top_height:long_name = "cloud top height" ; cloud_top_height:_FillValue = 3.402823e+38f ; cloud_top_height:units = "km" ; cloud_top_height:coordinates = "latitude longitude" ; float cloud_top_pressure(image_y, image_x) ; cloud_top_pressure:valid_min = 0.f ; cloud_top_pressure:valid_max = 1100.f ; cloud_top_pressure:long_name = "cloud top pressure" ; cloud_top_pressure:_FillValue = 3.402823e+38f ; cloud_top_pressure:units = "hPa" ; cloud_top_pressure:coordinates = "latitude longitude" ; float cloud_top_temperature(image_y, image_x) ; cloud_top_temperature:valid_min = 160.f ; cloud_top_temperature:valid_max = 340.f ; cloud_top_temperature:long_name = "cloud top temperature" ; cloud_top_temperature:_FillValue = 3.402823e+38f ; cloud_top_temperature:units = "K" ; cloud_top_temperature:coordinates = "latitude longitude" ; float cloud_visible_optical_depth(image_y, image_x) ; cloud_visible_optical_depth:valid_min = 0.f ; cloud_visible_optical_depth:valid_max = 150.f ; cloud_visible_optical_depth:long_name = "cloud optical depth" ; cloud_visible_optical_depth:_FillValue = 3.402823e+38f ; cloud_visible_optical_depth:units = "unitless" ; cloud_visible_optical_depth:coordinates = "latitude longitude" ; float latitude(image_y, image_x) ; latitude:valid_min = -90.f ; latitude:valid_max = 90.f ; latitude:long_name = "latitude" ; latitude:_FillValue = 3.402823e+38f ; latitude:coordinates = "latitude longitude" ; latitude:units = "degree_N" ; float longitude(image_y, image_x) ; longitude:valid_min = -180.f ; longitude:valid_max = 180.f ; longitude:long_name = "longitude" ; longitude:_FillValue = 3.402823e+38f ; longitude:coordinates = "latitude longitude" ; longitude:units = "degree_E" ; float reflectance_vis(image_y, image_x) ; reflectance_vis:valid_min = 0.f ; reflectance_vis:valid_max = 1.6f ; reflectance_vis:long_name = "Visible reflectance (0.65 um)" ; reflectance_vis:_FillValue = 3.402823e+38f ; reflectance_vis:units = "unitless" ; reflectance_vis:coordinates = "latitude longitude" ; float scanline_time(image_y) ; scanline_time:units = "GMT" ; scanline_time:valid_min = 0.f ; scanline_time:valid_max = 24.f ; scanline_time:long_name = "scanline time in GMT" ; scanline_time:NOTE = "This is the actual time per scanline (nominal image time + time to scan to that point)" ; float temperature133(image_y, image_x) ; temperature133:valid_min = 160.f ; temperature133:valid_max = 360.f ; temperature133:long_name = "Infrared Channel temperature (13.3 um)" ; temperature133:_FillValue = 3.402823e+38f ; temperature133:units = "K" ; temperature133:coordinates = "latitude longitude" ; float temperature87(image_y, image_x) ; temperature87:valid_min = 160.f ; temperature87:valid_max = 360.f ; temperature87:long_name = "Infrared Channel temperature (8.4 um)" ; temperature87:_FillValue = 3.402823e+38f ; temperature87:units = "K" ; temperature87:coordinates = "latitude longitude" ; float temperature_67(image_y, image_x) ; temperature_67:valid_min = 160.f ; temperature_67:valid_max = 360.f ; temperature_67:long_name = "IR Mid-level Water Vapor (6.8um)" ; temperature_67:_FillValue = 3.402823e+38f ; temperature_67:units = "K" ; temperature_67:coordinates = "latitude longitude" ; float temperature_ir(image_y, image_x) ; temperature_ir:valid_min = 160.f ; temperature_ir:valid_max = 360.f ; temperature_ir:long_name = "Infrared Channel temperature (11.2 um)" ; temperature_ir:_FillValue = 3.402823e+38f ; temperature_ir:units = "K" ; temperature_ir:coordinates = "latitude longitude" ; float temperature_sir(image_y, image_x) ; temperature_sir:valid_min = 160.f ; temperature_sir:valid_max = 360.f ; temperature_sir:long_name = "Solar Infrared temperature (3.9 um)" ; temperature_sir:_FillValue = 3.402823e+38f ; temperature_sir:units = "K" ; temperature_sir:coordinates = "latitude longitude" ; float temperature_sw(image_y, image_x) ; temperature_sw:valid_min = 160.f ; temperature_sw:valid_max = 360.f ; temperature_sw:long_name = "Split-Window Channel temperature (11.9 um)" ; temperature_sw:_FillValue = 3.402823e+38f ; temperature_sw:units = "K" ; temperature_sw:coordinates = "latitude longitude" ; double time_offset ; time_offset:units = "seconds since 2024-01-31 00:00:00 GMT" ; time_offset:long_name = "Time offset from base_time" ; time_offset:NOTE = "This is the nominal (starting) time of the satellite image" ; // global attributes: :processed_date = " Mar 24, 2024 00:59:31 UTC" ; :version_comment = "processed using MODIS Collection 6.1 MATCH Hourly aerosols" ; :User_Note = "All of the datasets provided on this website are part of ongoing research projects. Users of the data for research leading to conference-level or peer-reviewed publications should contact Dr. William L. Smith Jr. (william.l.smith@nasa.gov) before publishing any papers that include data from this site. The source of the data should be properly acknowledged and/or co-authorship should be offered depending on the level of documentation and contribution of the particular dataset.If only the satellite imagery are used then we ask only for a simple acknowledgment: \"the images were obtained from the NASA Langley Cloud and Radiation Research Group, http://satcorps.larc.nasa.gov \". For any derived cloud, icing, and radiation products, it is in the best interest of individual researchers who use these datasets to ensure that they are using the latest and highest quality products available. Either Dr. Smith or other group members can provide the proper references, caveats, or level of participation needed for any given request." ; :broadband_comment = "broadband_longwave_flux and broadband_shortwave_albedo have been corrected by regionally (5x5 degree) normalizing to Ed4 CERES NOAA20 SSF1deg for corresponding month (alb converted to SW flux for correction)" ; :NetCDF_Version = "netcdf 4.0.1" ; :facility_id = "X1" ; :site_id = "sgp" ; :location = "sgp" ; :zeb_platform = "sgpvisstpx2dg16minnisX1.c1" ; :history = "Fri Mar 29 12:43:49 2024: ncks -C -O -x -v tisa_record,vis_063_calib,temp_nir_calib,temp_ir_calib,temp_wv_calib,temp_sw_calib,mc_directory_header,mc_navigation_header,mc_calibration_header,grid_lat,grid_lon,clearsky_vis_reflectance,clearsky_ir_temperature,visible_count,solar_zenith_angle,view_zenith_angle,relative_azimuth_angle,skin_temperature,pixel_aza,pixel_sza,pixel_vza,pixel_skin_temperature,visst_netcdf_version,skin_temperature,reflec08,reflec16,reflec047,reflec137,image_x,image_y sgporgvisstpx2dg16minnisX1.c1.20240131.234000.cdf sgpvisstpx2dg16minnisX1.c1.20240131.234000.cdf\ncreated by user mk on machine cerx86b at Fri Mar 29 12:43:49 2024, using IDL 8.5" ; :input_files = "GOES-16" ; :resolution = "2km" ; :reflectance_vis_note1 = "effective_wavelength_visst = 0.64 um" ; :reflectance_vis_note2 = "spectral_width_instrument = 0.60 um - 0.68 um" ; :temperature_sir_note1 = "effective_wavelength_visst = 3.9 um" ; :temperature_sir_note2 = "spectral_width_instrument = 3.8 um - 4.0 um" ; :temperature_ir_note1 = "effective_wavelength_visst = 11.2 um" ; :temperature_ir_note2 = "spectral_width_instrument = 10.8 um - 11.6 um" ; :temperature_sw_note1 = "effective_wavelength_visst = 12.3 um" ; :temperature_sw_note2 = "spectral_width_instrument = 11.8 - 12.8 um" ; :Version = "V4.2.4" ; :longwave_NB_BB_correlation = "The LW NB-BB correlation is given by a method similar to the radiance-based approach in Doelling, D.R., M. Sun, L.T. Nguyen, M.L.Nordeen, C.O.Haney, D.F. Keyes, and P.E. Mlynczak, \"Advances in Geostationary-Derived Longwave Fluxes for the CERES Synoptic (SYN1deg) Product\", J. Atmos. Oceanic Technol., Vol. 33 (3), pp. 503-521 (March 2016) doi:10.1175/JTECH-D-15-0147.1 (with modifications); this data includes application of a regional 5x5 degree monthly normalization to Edition 4 CERES Aqua SSF1deg LW fluxes (linear correction)." ; :shortwave_NB_BB_correlation = "The SW NB-BB correlation is given by Abb = a + b*Anb + c*Anb*Anb + d*ln(1/cos(SZA)),where Abb is the BB albedo (fraction),Anb is the NB albedo (fraction) and SZA is the solar zenith angle (deg).The coefficients are seasonal; winter:a=0.046838,b=0.697849,c=0.031232,d=0.046153.The relationship was derived from 2008-10 GOES-13 vs CERES-Terra Ed3 fluxes over the ARM_SGP domain and have corresponding albedo RMS of winter 0.0241 (7.94%). The CERES bidirectional model is used to convert NB reflectance to albedo. BB SW albedoes have been normalized via a regional 5x5 degree monthly normalization to Edition 4 CERES SSF1deg NOAA20 SW fluxes (converted to SW fluxes, linear correction, applied where SZA < 86 deg); final/corrected albedoes constrained to 5% (min) to 95% (max)). REFERENCE:V.Chakrapani,D.R.Doelling,M.M.Khaiyer,and P.Minnis:2003, New Visible to Broadband Shortwave Conversions for Deriving Albedos from GOES-8 Over the ARM SGP,Proc. of 13th Annual ARM STM,Boulder,CO, March 31 to April 4, 2003.http://www.arm.gov/publications/proceedings/conf13/" ; :visible_calibration = "The GOES-16 visible calibration equation is Rad(0.65um) = (g0)*(C-C0), where g0= 0.1644,C= visible channel count, C0=is the visible0 channel offset (128.0), d is the number of days since reference. REFERENCE: Nguyen, L, D.R. Doelling, P. Minnis, J.K. Ayers, 2004, Rapid Technique to cross calibrate satellite imager with visible channels, Proc. of 49th SPIE Meeting, Denver, CO, Aug. 2-6, 2004. http://www-pm.larc.nasa.gov/arm_refs.html" ; :IR_calibration = "The GOES-16 IR calibration was based on the nominal equations used in Mcidas and found at http://www.oso.noaa.gov/goes/goes-calibration/gvar-conversion.htm" ; :VISST = "NASA-Langley cloud and radiation products are produced using a suite of algorithms, including VISST (Visible Infrared Solar-infrared Split-Window Technique), SIST (Solar-infrared Infrared Split-Window Technique) and SINT (Solar-infrared Infrared Near-Infrared Technique), now collectively called SatCORPS (Satellite Cloud Observations and Radiative Property retrieval System). The techniques use GOES-16 channels to detect clouds and retrieve cloud microphysics. Atmospheric profiles are obtained from the MERRA2 reanalysis product. REFERENCES: Trepte, Q. Z., P. Minnis, S. Sun-Mack, C. R. Yost, Y. Chen, Z. Jin, G. Hong, F.-L. Chang, W. L. Smith, Jr., K. Bedka, T.L. Chee, 2019: Global cloud detection for CERES Edition 4 using Terra and Aqua MODIS data. IEEE Trans. Geosci. Remote Sens., vol. 57, no. 11, pp. 9410-9449, Nov. 2019, doi: 10.1109/TGRS.2019.2926620; Minnis, P., S. Sun-Mack, Y. Chen, F.-L. Chang, C. R. Yost, W. L. Smith, Jr., P. W. Heck, R. F. Arduini, S. Bedka, Y.Yi, G. Hong, Z. Jin, D. Painemal, R. Palikonda, B. Scarino, D. A. Spangenberg, R. Smith, Q. Z. Trepte, P. Yang, and Y. Xie, 2020: CERES MODIS cloud product retrievals for Edition 4, Part 1: Algorithm changes. IEEE Trans. Geosci. Remote Sens., doi: 10.1109/TGRS.2020.3008866; Minnis, P., L. Nguyen, R. Palikonda, P. W. Heck, D. A. Spangenberg, D. R. Doelling, J. K. Ayers, W. L. Smith, Jr., M. M. Khaiyer, Q. Z. Trepte, L. A. Avey, F.-L. Chang, C. R. Yost, T. Chee, S. Sun-Mack, Near-real time cloud retrievals from operational and research meteorological satellites, Proc. SPIE 7107, Remote Sensing of Clouds and the Atmosphere XIII, 710703 (13 October 2008); https://doi.org/10.1117/12.800344" ; :VERSION = "This version was processed historically and is an intermediate version. As updates are made, the data will be reprocessed in the future and replaced." ; :NCO = "netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = http://github.com/nco/nco)" ; }