netcdf twpvisstpx04m1rv3minnisX30.c1.20071231.003000 {
dimensions:
	time = UNLIMITED ; // (9412 currently)
	index = 13 ;
variables:
	int base_time ;
		base_time:string = "2007-12-31, 00:00:00 GMT" ;
		base_time:long_name = "base time in epoch" ;
		base_time:units = "seconds since 1970-1-1 0:00:00 GMT" ;
	double time_offset(time) ;
		time_offset:long_name = "Time offset from base_time" ;
		time_offset:units = "seconds since 2007-12-31 00:00:00 GMT" ;
	double time(time) ;
		time:long_name = "Time offset from midnight" ;
		time:units = "seconds since 2007-12-31 00:00:00 GMT" ;
	float image_times(index) ;
		image_times:long_name = "Image times offset from base time" ;
		image_times:units = "seconds since 2007-12-31 00:00:00 GMT" ;
	float image_start(index) ;
		image_start:long_name = "Image start index" ;
		image_start:usage = "Images are merged together. Individual images can be extracted using the image index fields as in the following IDL example for given image n:\n",
			"rv = reflectance_vis(image_start(n-1):image_start(n-1)+image_numpix(n-1)-1)" ;
	float image_numpix(index) ;
		image_numpix:long_name = "Number of pixels for each image" ;
	float latitude(time) ;
		latitude:valid_min = -90.f ;
		latitude:valid_max = 90.f ;
		latitude:long_name = "north latitude" ;
		latitude:units = "deg" ;
	float longitude(time) ;
		longitude:valid_min = -180.f ;
		longitude:valid_max = 180.f ;
		longitude:long_name = "east longitude" ;
		longitude:units = "deg" ;
	float reflectance_vis(time) ;
		reflectance_vis:valid_min = 0.f ;
		reflectance_vis:valid_max = 1.6f ;
		reflectance_vis:long_name = "Visible reflectance (0.65 um)" ;
		reflectance_vis:units = "unitless" ;
	float reflectance_nir(time) ;
		reflectance_nir:valid_min = 0.f ;
		reflectance_nir:valid_max = 1.6f ;
		reflectance_nir:long_name = "Near Infrared reflectance (1.6 um)" ;
		reflectance_nir:units = "unitless" ;
	float temperature_sir(time) ;
		temperature_sir:valid_min = 160.f ;
		temperature_sir:valid_max = 340.f ;
		temperature_sir:long_name = "Solar Infrared temperature (3.9 um)" ;
		temperature_sir:units = "K" ;
	float temperature_ir(time) ;
		temperature_ir:valid_min = 160.f ;
		temperature_ir:valid_max = 340.f ;
		temperature_ir:long_name = "Infrared Channel temperature (10.8 um)" ;
		temperature_ir:units = "K" ;
	float temperature_sw(time) ;
		temperature_sw:valid_min = 160.f ;
		temperature_sw:valid_max = 340.f ;
		temperature_sw:long_name = "Split-Window Channel temperature (11.9 um)" ;
		temperature_sw:units = "K" ;
	float broadband_shortwave_albedo(time) ;
		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:units = "%" ;
	float broadband_longwave_flux(time) ;
		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:units = "W/m^2" ;
	float ir_cloud_emittance(time) ;
		ir_cloud_emittance:valid_min = 0.f ;
		ir_cloud_emittance:valid_max = 1.5f ;
		ir_cloud_emittance:long_name = "IR cloud emittance" ;
		ir_cloud_emittance:units = "unitless" ;
	int cloud_phase(time) ;
		cloud_phase:valid_min = 0 ;
		cloud_phase:valid_max = 7 ;
		cloud_phase:long_name = "cloud phase" ;
		cloud_phase:units = "unitless" ;
		cloud_phase:value_0 = "clear over snow/ice" ;
		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 retrieval" ;
		cloud_phase:value_6 = "suspected water" ;
		cloud_phase:value_7 = "suspected ice" ;
	float visible_optical_depth(time) ;
		visible_optical_depth:valid_min = 0.f ;
		visible_optical_depth:valid_max = 128.f ;
		visible_optical_depth:long_name = "cloud optical depth" ;
		visible_optical_depth:units = "unitless" ;
	float particle_size(time) ;
		particle_size:valid_min = 0.f ;
		particle_size:valid_max = 150.f ;
		particle_size:long_name = "effective particle radius or diameter" ;
		particle_size:units = "microns" ;
		particle_size:value_1 = "If phase=1 (water), this parameter is radius." ;
		particle_size:value_2 = "If phase=2 (ice), this parameter is diameter." ;
	float liquid_water_path(time) ;
		liquid_water_path:valid_min = 0.f ;
		liquid_water_path:valid_max = 6000.f ;
		liquid_water_path:long_name = "Liquid or Ice Water Path" ;
		liquid_water_path:units = "g/m^2" ;
		liquid_water_path:value_1 = "NOTE: If phase is 1 (water), this is Liquid Water Path." ;
		liquid_water_path:value_2 = "NOTE: If phase is 2 (ice), this is Ice Water Path." ;
	float cloud_effective_temperature(time) ;
		cloud_effective_temperature:valid_min = 160.f ;
		cloud_effective_temperature:valid_max = 340.f ;
		cloud_effective_temperature:long_name = "Effective cloud temperature" ;
		cloud_effective_temperature:units = "K" ;
	float cloud_top_pressure(time) ;
		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:units = "hPa" ;
	float cloud_effective_pressure(time) ;
		cloud_effective_pressure:valid_min = 0.f ;
		cloud_effective_pressure:valid_max = 1100.f ;
		cloud_effective_pressure:long_name = "Effective cloud pressure" ;
		cloud_effective_pressure:units = "hPa" ;
	float cloud_bottom_pressure(time) ;
		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:units = "hPa" ;
	float cloud_top_height(time) ;
		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:units = "km" ;
	float cloud_effective_height(time) ;
		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:units = "km" ;
	float cloud_bottom_height(time) ;
		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:units = "km" ;

// global attributes:
		:NetCDF_Version\  = "netCDF 3.5" ;
		:Title\  = "Pixel-level cloud products " ;
		:source = "NASA Langley Research Center" ;
		:version\  = "V3.0" ;
		:date\  = "VISST processed on 03/18/2010 16:15:29" ;
		:facility_id\  = "X1" ;
		:location\  = "dar" ;
		:data_level\  = "c1" ;
		:missing_value\  = "-9999." ;
		:history\  = "created by user mk on machine parkerco at Thu Apr 29 04:38:53 2010 UTC, using IDL 5.5" ;
		:reflectance_vis_note1 = "effective_wavelength_visst = 0.73 um" ;
		:reflectance_vis_note2 = "spectral_width_instrument =  0.55 um - 0.80 um" ;
		:temperature_sir_note1 = "effective_wavelength_visst = 3.75 um" ;
		:temperature_sir_note2 = "spectral_width_instrument = 3.5 um - 4.0 um" ;
		:temperature_ir_note1 = "effective_wavelength_visst = 10.8 um" ;
		:temperature_ir_note2 = "spectral_width_instrument = 10.3 um - 11.3 um" ;
		:temperature_sw_note1 = "effective_wavelength_visst = 12.0 um" ;
		:temperature_sw_note2 = "spectral_width_instrument = 11.5 - 12.5 um" ;
		:longwave_NB_BB_correlation = "The LW NB-BB correlation is given by Mbb=a+b*Mnb+c*Mnb*Mnb+dMnb*ln(colRH), where Mbb is the BB OLR(Wm-2), Mnb is the NB flux(Wm-2um-1), and colRH is the column weighted relative humidity(%) above the radiating surface. The coefficients are, for ocean night: a=96.67,b=3.60,c=0.016,d=-0.29566,and day a=76.32,b=4.38,c=0.00577,d=-0.2744; land night a=72.57,b=5.27,c=-0.00522,d=-0.29886; day a=57.88,b=5.54,c=-0.01737,d=-0.18742. The fit was derived from Oct-Dec07 MTSAT/CERES-Terra Ed2F fluxes over the Darwin domain. For land, the day RMS is 7.49Wm-2 (2.82%), night is 9.55Wm-2 (4.18%); for ocean, day 8.66 Wm-2 (3.56%), and night 9.05 Wm-2 (3.67%). The CERES limb-darkening function is used to convert NB radiance to flux. These fluxes are preliminary. REFERENCE: Doelling,D.R, M.M.Khaiyer,and P.Minnis: Improved ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances based on CERES data, Proc. 13th Annual ARM Science Team Meeting,Boulder,CO,Mar31-Apr4,2003.http://www.arm.gov/publications/proceedings/conf13/" ;
		:shortwave_NB_BB_correlation = "The shortwave narrowband to broadband correlation is given by Abb = a + b*Anb + c*Anb*Anb + d*ln(1/cos (SZA)), where Abb is the broadband albedo (fraction), Anb is the narrowband albedo (fraction) and SZA is the solar zenith angle (deg). The coefficients are land a=0.0490,b=0.6322,c=0.20017,d=-0.02254, and ocean a=0.0272,b=0.8051,c=-0.0439,d=0.01065. The relationship was derived from MTSAT/CERES-Terra Ed2F fluxes Oct-Dec07 over the Darwin domain and has a 0.0260 (15.90%) ocean albedo rms, and a .0186 (8.9%) land albedo rms. These fluxes are preliminary. 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 Science Team Meeting, Boulder, CO, March 31 to April 4, 2003. http://www.arm.gov/publications/proceedings/conf13/" ;
		:visible_calibration = "The MTSAT visible calibration equation is Rad(0.65um) = (g0 + g1*d + g2*d*d)*(C-C0), where g0=0.61, g1=0.0, g2=0.0, C= visible channel count, C0=is the visible channel offset , 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#CPR" ;
		:IR_calibration = "The MTSAT IR calibration equation is: IR_tempnew = x*(IR_temp + corr), where the daytime factors are: for the 3.9um channel, x=1.0, corr=0.35; 6.7um, x=0.99, corr=1.20; 11um, x=1.0, corr=-0.16; 12um, x=1.003,corr=-0.63. For nighttime, 3.9um, x=1.001,corr=0.43, 6.7um, x=0.99, corr=1.23; 11um,x=1.001,corr=-0.40; 12um,x=1.005, corr=-0.86." ;
		:VISST = "NASA-Langley cloud and radiation products are produced using the VISST (Visible Infrared Solar-infrared Split-Window Technique), SIST (Solar-infrared Infrared Split-Window Technique) and SINT (Solar-infrared Infrared Near-Infrared Technique). The technique uses MTSAT channels to detect clouds and retrieve cloud microphysics.  Atmospheric profiles are obtained from CERES MOA. REFERENCE: Minnis, P., et al., 2001: A near-realtime method for deriving cloud and radiation properties from satellites for weather and climate studies. Proc. AMS 11th Conf. Satellite Meteorology and Oceanography,Madison, WI, Oct.  15-18, 477-480. http://www-pm.larc.nasa.gov/arm_refs.html#CPR" ;
		:DATA\ VERSION\ NOTE = "This version was processed historically and is an intermediate version.  The data will be reprocessed in the future and replaced.  NOTE:The MTSAT-1R visible calibration was found to be nonlinear in the darker radiances near bright scene types. A nonlinear calibration approach seemed to mitigate most effects in deriving a broadband flux estimate. As more information on instrument performance and analysis is conducted, reprocessing may be necessary. MTSAT-2 was found to have a linear visible response and should offer greater confidence in its derived broadband fluxes. It will replace MTSAT-1R in July 2010." ;
		:input_files = "MTSAT-1R" ;
		:zeb_platform = "twpvisstdarpx04m1rv3minnisX1.c1" ;
		:site_id = "twp" ;
}