netcdf anxceilpblhtM1.a0.20200601.000000 {
dimensions:
	time = UNLIMITED ; // (5400 currently)
variables:
	int base_time ;
		base_time:string = "2020-06-01 00:00:00 0:00" ;
		base_time:long_name = "Base time in Epoch" ;
		base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ;
		base_time:ancillary_variables = "time_offset" ;
	double time_offset(time) ;
		time_offset:long_name = "Time offset from base_time" ;
		time_offset:units = "seconds since 2020-06-01 00:00:00 0:00" ;
		time_offset:ancillary_variables = "base_time" ;
	double time(time) ;
		time:long_name = "Time offset from midnight" ;
		time:units = "seconds since 2020-06-01 00:00:00 0:00" ;
	int sample_count(time) ;
		sample_count:long_name = "Number of samples averaged to calculate the current BL_HEIGHTs" ;
		sample_count:units = "unitless" ;
	float bl_height_1(time) ;
		bl_height_1:long_name = "First boundary layer height candidate" ;
		bl_height_1:units = "meters" ;
		bl_height_1:missing_value = -9999.f ;
	int bl_index_1(time) ;
		bl_index_1:long_name = "Quality index for first boundary layer height candidate" ;
		bl_index_1:units = "unitless" ;
		bl_index_1:missing_value = -9999 ;
		bl_index_1:flag_values = 1, 2, 3 ;
		bl_index_1:flag_meanings = "weak_layer significant_layer strong_layer" ;
		bl_index_1:comment = "The current BL-VIEW algorithm gives a quality index from 1 to 3 to each gradient minimum detection. It is based on gradient amount (a low gradient results in a high quality index), detected cloud bases (clouds detected in the vicinity of a boundary layer reduce its quality index), and distance to other gradient minima (high distance results in high quality)." ;
	float bl_height_2(time) ;
		bl_height_2:long_name = "Second boundary layer height candidate" ;
		bl_height_2:units = "meters" ;
		bl_height_2:missing_value = -9999.f ;
	int bl_index_2(time) ;
		bl_index_2:long_name = "Quality index for second boundary layer height candidate" ;
		bl_index_2:units = "unitless" ;
		bl_index_2:missing_value = -9999 ;
		bl_index_2:flag_values = 1, 2, 3 ;
		bl_index_2:flag_meanings = "weak_layer significant_layer strong_layer" ;
		bl_index_2:comment = "The current BL-VIEW algorithm gives a quality index from 1 to 3 to each gradient minimum detection. It is based on gradient amount (a low gradient results in a high quality index), detected cloud bases (clouds detected in the vicinity of a boundary layer reduce its quality index), and distance to other gradient minima (high distance results in high quality)." ;
	float bl_height_3(time) ;
		bl_height_3:long_name = "Third boundary layer height candidate" ;
		bl_height_3:units = "meters" ;
		bl_height_3:missing_value = -9999.f ;
	int bl_index_3(time) ;
		bl_index_3:long_name = "Quality index for third boundary layer height candidate" ;
		bl_index_3:units = "unitless" ;
		bl_index_3:missing_value = -9999 ;
		bl_index_3:flag_values = 1, 2, 3 ;
		bl_index_3:flag_meanings = "weak_layer significant_layer strong_layer" ;
		bl_index_3:comment = "The current BL-VIEW algorithm gives a quality index from 1 to 3 to each gradient minimum detection. It is based on gradient amount (a low gradient results in a high quality index), detected cloud bases (clouds detected in the vicinity of a boundary layer reduce its quality index), and distance to other gradient minima (high distance results in high quality)." ;
	int detection_status(time) ;
		detection_status:long_name = "Detection status" ;
		detection_status:units = "unitless" ;
		detection_status:missing_value = -9999 ;
		detection_status:flag_values = 0, 1, 2, 3, 4, 5 ;
		detection_status:flag_meanings = "No_significant_backscatter \n",
			"One_cloud_base_detected \n",
			"Two_cloud_bases_detected \n",
			"Three_cloud_bases detected\n",
			"Full_obscuration_determined_but_no_cloud_base_detected\n",
			"Some_obscuration_detected_but_determined_to_be_transparent" ;
		detection_status:flag_0_description = "No significant backscatter" ;
		detection_status:flag_1_description = "One cloud base detected" ;
		detection_status:flag_2_description = "Two cloud bases detected" ;
		detection_status:flag_3_description = "Three cloud bases detected" ;
		detection_status:flag_4_description = "Full obscuration determined but no cloud base detected" ;
		detection_status:flag_5_description = "Some obscuration detected but determined to be transparent" ;
	float first_cbh(time) ;
		first_cbh:long_name = "Lowest cloud base height detected" ;
		first_cbh:units = "m" ;
		first_cbh:valid_min = 0.f ;
		first_cbh:valid_max = 7700.f ;
		first_cbh:missing_value = -9999.f ;
		first_cbh:comment = "If detection_status is 1, 2 or 3, a lowest cloud base height was detected. This value is the distance from the ground to the first cloud base. If detection_status is 4 this value will be stored as -9999 and a value for vertical_visibility will be stored. If detection_status is 0, -9999 will be stored for this value and vertical_visibility." ;
	float second_cbh(time) ;
		second_cbh:long_name = "Second lowest cloud base height" ;
		second_cbh:units = "m" ;
		second_cbh:valid_min = 0.f ;
		second_cbh:valid_max = 7700.f ;
		second_cbh:missing_value = -9999.f ;
		second_cbh:comment = "If detection_status is 2 or 3, a second cloud base was detected. This value is the distance from the ground to the second cloud base. If detection_status is 4 this value will be stored as -9999 and a value for alt_highest_signal will be stored." ;
	float third_cbh(time) ;
		third_cbh:long_name = "Third cloud base height" ;
		third_cbh:units = "m" ;
		third_cbh:valid_min = 0.f ;
		third_cbh:valid_max = 7700.f ;
		third_cbh:missing_value = -9999.f ;
		third_cbh:comment = "If detection_status is 3, a third cloud base was detected. This value is the distance from the ground to the third cloud base. If detection_status is 0, 1, 2, 4, -9999 will be stored for this value." ;
	float lat ;
		lat:long_name = "North latitude" ;
		lat:units = "degree_N" ;
		lat:valid_min = -90.f ;
		lat:valid_max = 90.f ;
		lat:standard_name = "latitude" ;
	float lon ;
		lon:long_name = "East longitude" ;
		lon:units = "degree_E" ;
		lon:valid_min = -180.f ;
		lon:valid_max = 180.f ;
		lon:standard_name = "longitude" ;
	float alt ;
		alt:long_name = "Altitude above mean sea level" ;
		alt:units = "m" ;
		alt:standard_name = "altitude" ;

// global attributes:
		:command_line = "ceilpblht_ingest -s anx -f M1" ;
		:process_version = "ingest-ceilpblht-1.1-2.el7" ;
		:dod_version = "ceilpblht-a0-1.1" ;
		:site_id = "anx" ;
		:facility_id = "M1: Andoy, Norway" ;
		:data_level = "a0" ;
		:input_source = "/data/collection/anx/anxceilpblhtM1.00/LEVEL_3_DEFAULT.20200601.000000.dat" ;
		:serial_number = "N/A" ;
		:ceilometer_id = "DEVICE_1" ;
		:data_update_period = 16 ;
		:averaging_interval = "data_update_period * sample_count" ;
		:algorithm_parameters = "height_averaging_flag = 1\n",
			"max_height_averaging_value = 360 meters\n",
			"time_averaging_flag = 1\n",
			"max_time_averaging_value = 3120 seconds\n",
			"algorithm_sensitivity = 10\n",
			"boundary_layer_min = 30 meters\n",
			"boundary_layer_max = 4000 meters\n",
			"number_boundary_layers = 3\n",
			"" ;
		:datastream = "anxceilpblhtM1.a0" ;
		:history = "created by user dsmgr on machine flint at 2020-06-04 13:14:03, using ingest-ceilpblht-1.1-2.el7" ;
}