netcdf CUES_5min_data_snowdepth_swe_density_2015to2025 {
dimensions:
	datetime = 1104192 ;
variables:
	float snow_depth_wind_mast(datetime) ;
		snow_depth_wind_mast:_FillValue = NaNf ;
		string snow_depth_wind_mast:long_name = "snow depth below platform wind mast" ;
		string snow_depth_wind_mast:standard_name = "surface_snow_thickness" ;
		string snow_depth_wind_mast:units = "cm" ;
		string snow_depth_wind_mast:instrument = "Campbell Scientific SR50A; Lufft SHM31" ;
		string snow_depth_wind_mast:instrument_description = "Campbell Scientific SR50A ultrasonic depth pinger (removed 09/2022) & Lufft SHM31 laser snow depth sensor (installed 09/2022; removed 09/2023)" ;
		string snow_depth_wind_mast:instrument_location = "wind mast - pointed downward toward ground on southwest corner of platform" ;
		string snow_depth_wind_mast:sensor_height = "5.8 m" ;
		string snow_depth_wind_mast:height_reference = "above bare ground" ;
		string snow_depth_wind_mast:valid_min = "0" ;
		string snow_depth_wind_mast:valid_max = "1000" ;
		string snow_depth_wind_mast:processing_method = "sampled every 5 min" ;
		string snow_depth_wind_mast:additional_info = "Campbell Scientific SR50A has maximum range of 10 m; Lufft SH31 has maximum range of 15 m; Lufft #3 in database" ;
		string snow_depth_wind_mast:period_data_availability = "70.7%" ;
		string snow_depth_wind_mast:additional_QC_campbell = "removed observations where quality flag was outside of 50-450 range; manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations; replaced remaining patches of anomalous values and significant peaks with running median" ;
		string snow_depth_wind_mast:additional_QC_lufft = "manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string snow_depth_wind_mast:gap_filling = "None" ;
		string snow_depth_wind_mast:ancillary_variables = "snow_depth_wind_mast_data_flag, snow_depth_wind_mast_instrument_flag" ;
	int snow_depth_wind_mast_data_flag(datetime) ;
		string snow_depth_wind_mast_data_flag:long_name = "wind mast snow depth data point source flags" ;
		string snow_depth_wind_mast_data_flag:standard_name = "data_value_source_flag" ;
		snow_depth_wind_mast_data_flag:flag_values = 0b, 1b ;
		snow_depth_wind_mast_data_flag:valid_range = 0b, 1b ;
		string snow_depth_wind_mast_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string snow_depth_wind_mast_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string snow_depth_wind_mast_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string snow_depth_wind_mast_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string snow_depth_wind_mast_data_flag:ancillary_variables = "snow_depth_wind_mast" ;
	int snow_depth_wind_mast_instrument_flag(datetime) ;
		string snow_depth_wind_mast_instrument_flag:long_name = "instrument for wind mast snow depth measurement" ;
		string snow_depth_wind_mast_instrument_flag:standard_name = "instrumentation_flag" ;
		snow_depth_wind_mast_instrument_flag:flag_values = 0b, 1b, 2b ;
		snow_depth_wind_mast_instrument_flag:valid_range = 0b, 2b ;
		string snow_depth_wind_mast_instrument_flag:flag_meanings_short = "measurement not present", "Campbell Scientific SR50A", "Lufft SHM31" ;
		string snow_depth_wind_mast_instrument_flag:flag_meaning_0 = "measurement not present" ;
		string snow_depth_wind_mast_instrument_flag:flag_meaning_1 = "Campbell Scientific SR50A ultrasonic depth pinger (removed 09/2022)" ;
		string snow_depth_wind_mast_instrument_flag:flag_meaning_2 = "Lufft SHM31 laser snow depth sensor (installed 09/2022; removed 09/2023)" ;
		string snow_depth_wind_mast_instrument_flag:additional_info = "" ;
		string snow_depth_wind_mast_instrument_flag:ancillary_variables = "snow_depth_wind_mast, snow_depth_wind_mast_data_flag" ;
	float snow_depth_fixed_boom(datetime) ;
		snow_depth_fixed_boom:_FillValue = NaNf ;
		string snow_depth_fixed_boom:long_name = "snow depth below fixed platform boom" ;
		string snow_depth_fixed_boom:standard_name = "surface_snow_thickness" ;
		string snow_depth_fixed_boom:units = "cm" ;
		string snow_depth_fixed_boom:instrument = "Judd Communications depth sensor" ;
		string snow_depth_fixed_boom:instrument_description = "Judd Communications ultrasonic depth pinger" ;
		string snow_depth_fixed_boom:instrument_location = "fixed boom – pointed downward toward ground on south side of platform" ;
		string snow_depth_fixed_boom:sensor_height = "7 m" ;
		string snow_depth_fixed_boom:height_reference = "above bare ground" ;
		string snow_depth_fixed_boom:valid_min = "0" ;
		string snow_depth_fixed_boom:valid_max = "1000" ;
		string snow_depth_fixed_boom:processing_method = "sampled every 5 min" ;
		string snow_depth_fixed_boom:additional_info = "Judd pinger has maximum range of 10 m; instrument removed in 09/2019" ;
		string snow_depth_fixed_boom:period_data_availability = "26.1%" ;
		string snow_depth_fixed_boom:additional_QC_judd = "manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations; replaced remaining patches of anomalous values with running median" ;
		string snow_depth_fixed_boom:gap_filling = "None" ;
		string snow_depth_fixed_boom:ancillary_variables = "snow_depth_fixed_boom_instrument_flag, snow_depth_fixed_boom_data_flag" ;
	int snow_depth_fixed_boom_data_flag(datetime) ;
		string snow_depth_fixed_boom_data_flag:long_name = "fixed boom snow depth data point source flags" ;
		string snow_depth_fixed_boom_data_flag:standard_name = "data_value_source_flag" ;
		snow_depth_fixed_boom_data_flag:flag_values = 0b, 1b ;
		snow_depth_fixed_boom_data_flag:valid_range = 0b, 1b ;
		string snow_depth_fixed_boom_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string snow_depth_fixed_boom_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string snow_depth_fixed_boom_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string snow_depth_fixed_boom_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string snow_depth_fixed_boom_data_flag:ancillary_variables = "snow_depth_fixed_boom" ;
	int snow_depth_fixed_boom_instrument_flag(datetime) ;
		string snow_depth_fixed_boom_instrument_flag:long_name = "instrument for fixed boom snow depth measurement" ;
		string snow_depth_fixed_boom_instrument_flag:standard_name = "instrumentation_flag" ;
		snow_depth_fixed_boom_instrument_flag:flag_values = 0b, 1b ;
		snow_depth_fixed_boom_instrument_flag:valid_range = 0b, 1b ;
		string snow_depth_fixed_boom_instrument_flag:flag_meanings_short = "measurement not present", "Judd Communications depth sensor" ;
		string snow_depth_fixed_boom_instrument_flag:flag_meaning_0 = "measurement not present" ;
		string snow_depth_fixed_boom_instrument_flag:flag_meaning_1 = "Judd Communications ultrasonic depth pinger (removed 09/2019)" ;
		string snow_depth_fixed_boom_instrument_flag:flag_meaning_2 = "" ;
		string snow_depth_fixed_boom_instrument_flag:additional_info = "" ;
		string snow_depth_fixed_boom_instrument_flag:ancillary_variables = "snow_depth_fixed_boom, snow_depth_fixed_boom_data_flag" ;
	float snow_depth_platform_south(datetime) ;
		snow_depth_platform_south:_FillValue = NaNf ;
		string snow_depth_platform_south:long_name = "snow depth south of platform" ;
		string snow_depth_platform_south:standard_name = "surface_snow_thickness" ;
		string snow_depth_platform_south:units = "cm" ;
		string snow_depth_platform_south:instrument = "Lufft SHM31" ;
		string snow_depth_platform_south:instrument_description = "Lufft SHM31 laser snow depth sensor" ;
		string snow_depth_platform_south:instrument_location = "platform railing - pointed obliquely toward ground on south side of platform" ;
		string snow_depth_platform_south:sensor_height = "6.5 m" ;
		string snow_depth_platform_south:height_reference = "above bare ground" ;
		string snow_depth_platform_south:valid_min = "0" ;
		string snow_depth_platform_south:valid_max = "1500" ;
		string snow_depth_platform_south:processing_method = "sampled every 5 min" ;
		string snow_depth_platform_south:additional_info = "Lufft SH31 has maximum range of 15 m; installed in 09/2019; Lufft #1 in database" ;
		string snow_depth_platform_south:period_data_availability = "54.2%" ;
		string snow_depth_platform_south:additional_QC_lufft = "manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string snow_depth_platform_south:gap_filling = "None" ;
		string snow_depth_platform_south:ancillary_variables = "snow_depth_platform_south_data_flag, snow_depth_platform_south_instrument_flag" ;
	int snow_depth_platform_south_data_flag(datetime) ;
		string snow_depth_platform_south_data_flag:long_name = "platform south snow depth data point source flags" ;
		string snow_depth_platform_south_data_flag:standard_name = "data_value_source_flag" ;
		snow_depth_platform_south_data_flag:flag_values = 0b, 1b ;
		snow_depth_platform_south_data_flag:valid_range = 0b, 1b ;
		string snow_depth_platform_south_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string snow_depth_platform_south_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string snow_depth_platform_south_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string snow_depth_platform_south_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string snow_depth_platform_south_data_flag:ancillary_variables = "snow_depth_platform_south" ;
	int snow_depth_platform_south_instrument_flag(datetime) ;
		string snow_depth_platform_south_instrument_flag:long_name = "instrument for platform south snow depth measurement" ;
		string snow_depth_platform_south_instrument_flag:standard_name = "instrumentation_flag" ;
		snow_depth_platform_south_instrument_flag:flag_values = 0b, 1b ;
		snow_depth_platform_south_instrument_flag:valid_range = 0b, 1b ;
		string snow_depth_platform_south_instrument_flag:flag_meanings_short = "measurement not present", "Lufft SHM31" ;
		string snow_depth_platform_south_instrument_flag:flag_meaning_0 = "measurement not present" ;
		string snow_depth_platform_south_instrument_flag:flag_meaning_1 = "Lufft SHM31 laser snow depth sensor (installed 09/2019)" ;
		string snow_depth_platform_south_instrument_flag:flag_meaning_2 = "" ;
		string snow_depth_platform_south_instrument_flag:additional_info = "" ;
		string snow_depth_platform_south_instrument_flag:ancillary_variables = "snow_depth_platform_south, snow_depth_platform_south_data_flag" ;
	float snow_depth_remote_boom(datetime) ;
		snow_depth_remote_boom:_FillValue = NaNf ;
		string snow_depth_remote_boom:long_name = "snow depth below I-beam remote boom" ;
		string snow_depth_remote_boom:standard_name = "surface_snow_thickness" ;
		string snow_depth_remote_boom:units = "cm" ;
		string snow_depth_remote_boom:instrument = "Judd Communications depth sensor; SensorLogic SNOdar" ;
		string snow_depth_remote_boom:instrument_description = "Judd Communications ultrasonic depth pinger (removed 09/2024) & SensorLogic SNOdar snow depth lidar (installed 09/2024)" ;
		string snow_depth_remote_boom:instrument_location = "remote boom off I-beam - pointed downward toward ground from remote boom south of CUES platform" ;
		string snow_depth_remote_boom:sensor_height = "6.4 m" ;
		string snow_depth_remote_boom:height_reference = "above bare ground" ;
		string snow_depth_remote_boom:valid_min = "0" ;
		string snow_depth_remote_boom:valid_max = "900" ;
		string snow_depth_remote_boom:processing_method = "Judd measurements sampled every 5 min; 1-min SNOdar measurements were resampled to every 5 min" ;
		string snow_depth_remote_boom:additional_info = "sampled region approximately collocated with the California DWR snow pillow; Judd pinger has maximum range of 10 m; SNOdar has maximum range of 9 m" ;
		string snow_depth_remote_boom:period_data_availability = "92.3%" ;
		string snow_depth_remote_boom:additional_QC_judd = "manually set erroneously high and low values to NaN; applied Hampel filters with 3-h and 6-h centered running median, in turn, to filter points beyond +- 3 standard deviations; replaced any remaining isolated peaks greater than 10 cm compared to adjacent times with running median" ;
		string snow_depth_remote_boom:additional_QC_snodar = "applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string snow_depth_remote_boom:gap_filling = "None" ;
		string snow_depth_remote_boom:ancillary_variables = "snow_depth_remote_boom_instrument_flag, snow_depth_remote_boom_data_flag, snow_depth_remote_boom_density_calc" ;
	int snow_depth_remote_boom_data_flag(datetime) ;
		string snow_depth_remote_boom_data_flag:long_name = "remote boom snow depth data point source flags" ;
		string snow_depth_remote_boom_data_flag:standard_name = "data_value_source_flag" ;
		snow_depth_remote_boom_data_flag:flag_values = 0b, 1b ;
		snow_depth_remote_boom_data_flag:valid_range = 0b, 1b ;
		string snow_depth_remote_boom_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string snow_depth_remote_boom_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string snow_depth_remote_boom_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string snow_depth_remote_boom_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string snow_depth_remote_boom_data_flag:ancillary_variables = "snow_depth_remote_boom" ;
	int snow_depth_remote_boom_instrument_flag(datetime) ;
		string snow_depth_remote_boom_instrument_flag:long_name = "instrument for remote boom snow depth measurement" ;
		string snow_depth_remote_boom_instrument_flag:standard_name = "instrumentation_flag" ;
		snow_depth_remote_boom_instrument_flag:flag_values = 0b, 1b, 2b ;
		snow_depth_remote_boom_instrument_flag:valid_range = 0b, 2b ;
		string snow_depth_remote_boom_instrument_flag:flag_meanings_short = "measurement not present", "Judd Communications depth sensor", "SensorLogic SNOdar" ;
		string snow_depth_remote_boom_instrument_flag:flag_meaning_0 = "measurement not present" ;
		string snow_depth_remote_boom_instrument_flag:flag_meaning_1 = "Judd Communications ultrasonic depth pinger (removed 09/2024)" ;
		string snow_depth_remote_boom_instrument_flag:flag_meaning_2 = "SensorLogic SNOdar snow depth lidar (installed 09/2024)" ;
		string snow_depth_remote_boom_instrument_flag:additional_info = "" ;
		string snow_depth_remote_boom_instrument_flag:ancillary_variables = "snow_depth_remote_boom, snow_depth_remote_boom_data_flag, snow_depth_remote_boom_density_calc" ;
	float snow_depth_remote_boom_density_calc(datetime) ;
		snow_depth_remote_boom_density_calc:_FillValue = NaNf ;
		string snow_depth_remote_boom_density_calc:long_name = "snow depth below I-beam remote boom - filtered for snow density calculation" ;
		string snow_depth_remote_boom_density_calc:standard_name = "surface_snow_thickness" ;
		string snow_depth_remote_boom_density_calc:units = "cm" ;
		string snow_depth_remote_boom_density_calc:instrument = "Judd Communications depth sensor; SensorLogic SNOdar" ;
		string snow_depth_remote_boom_density_calc:instrument_description = "downward-pointing Judd Communications ultrasonic depth pinger (removed 09/2024) & SensorLogic SNOdar snow depth lidar (installed 09/2024)" ;
		string snow_depth_remote_boom_density_calc:instrument_location = "remote boom off I-beam - south of CUES platform" ;
		string snow_depth_remote_boom_density_calc:sensor_height = "6.4 m" ;
		string snow_depth_remote_boom_density_calc:height_reference = "above bare ground" ;
		string snow_depth_remote_boom_density_calc:valid_min = "0" ;
		string snow_depth_remote_boom_density_calc:valid_max = "900" ;
		string snow_depth_remote_boom_density_calc:processing_method = "Judd measurements sampled every 5 min; 1-min SNOdar measurements were resampled to every 5 min" ;
		string snow_depth_remote_boom_density_calc:additional_info = "sampled region approximately collocated with the California DWR snow pillow; Judd pinger has maximum range of 10 m; SNOdar has maximum range of 9 m" ;
		string snow_depth_remote_boom_density_calc:period_data_availability = "61.1%" ;
		string snow_depth_remote_boom_density_calc:additional_QC = "3-h centered rolling mean of snow_depth_remote_boom; filtered values <= 0 set to NaN or where filtered SWE from DWR snow pillow <= 0" ;
		string snow_depth_remote_boom_density_calc:gap_filling = "None" ;
		string snow_depth_remote_boom_density_calc:ancillary_variables = "snow_depth_remote_boom, snow_depth_remote_boom_instrument_flag, snow_depth_remote_boom_data_flag, snow_depth_remote_boom_density_calc" ;
	float snow_depth_platform_north(datetime) ;
		snow_depth_platform_north:_FillValue = NaNf ;
		string snow_depth_platform_north:long_name = "snow depth north of platform" ;
		string snow_depth_platform_north:standard_name = "surface_snow_thickness" ;
		string snow_depth_platform_north:units = "cm" ;
		string snow_depth_platform_north:instrument = "Lufft SHM31" ;
		string snow_depth_platform_north:instrument_description = "Lufft SHM31 laser snow depth sensor" ;
		string snow_depth_platform_north:instrument_location = "on platform - pointed obliquely toward ground on north side of platform" ;
		string snow_depth_platform_north:sensor_height = "8.2 m" ;
		string snow_depth_platform_north:height_reference = "above bare ground" ;
		string snow_depth_platform_north:valid_min = "0" ;
		string snow_depth_platform_north:valid_max = "1500" ;
		string snow_depth_platform_north:processing_method = "sampled every 5 min" ;
		string snow_depth_platform_north:additional_info = "sampled region approximately collocated with the SSG snow pillow; Lufft SH31 has maximum range of 15 m; installed in 10/2020; Lufft #2 in database" ;
		string snow_depth_platform_north:period_data_availability = "39.4%" ;
		string snow_depth_platform_north:additional_QC_lufft = "manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string snow_depth_platform_north:gap_filling = "None" ;
		string snow_depth_platform_north:ancillary_variables = "snow_depth_platform_north_data_flag, snow_depth_platform_north_instrument_flag" ;
	int snow_depth_platform_north_data_flag(datetime) ;
		string snow_depth_platform_north_data_flag:long_name = "platform north snow depth data point source flags" ;
		string snow_depth_platform_north_data_flag:standard_name = "data_value_source_flag" ;
		snow_depth_platform_north_data_flag:flag_values = 0b, 1b ;
		snow_depth_platform_north_data_flag:valid_range = 0b, 1b ;
		string snow_depth_platform_north_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string snow_depth_platform_north_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string snow_depth_platform_north_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string snow_depth_platform_north_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string snow_depth_platform_north_data_flag:ancillary_variables = "snow_depth_platform_north" ;
	int snow_depth_platform_north_instrument_flag(datetime) ;
		string snow_depth_platform_north_instrument_flag:long_name = "instrument for platform north snow depth measurement" ;
		string snow_depth_platform_north_instrument_flag:standard_name = "instrumentation_flag" ;
		snow_depth_platform_north_instrument_flag:flag_values = 0b, 1b ;
		snow_depth_platform_north_instrument_flag:valid_range = 0b, 1b ;
		string snow_depth_platform_north_instrument_flag:flag_meanings_short = "measurement not present", "Lufft SHM31" ;
		string snow_depth_platform_north_instrument_flag:flag_meaning_0 = "measurement not present" ;
		string snow_depth_platform_north_instrument_flag:flag_meaning_1 = "Lufft SHM31 laser snow depth sensor (installed 10/2020)" ;
		string snow_depth_platform_north_instrument_flag:flag_meaning_2 = "" ;
		string snow_depth_platform_north_instrument_flag:additional_info = "" ;
		string snow_depth_platform_north_instrument_flag:ancillary_variables = "snow_depth_platform_north, snow_depth_platform_north_data_flag, snow_depth_platform_north_density_calc" ;
	float snow_depth_platform_north_density_calc(datetime) ;
		snow_depth_platform_north_density_calc:_FillValue = NaNf ;
		string snow_depth_platform_north_density_calc:long_name = "snow depth north of platform - filtered for snow density calculation" ;
		string snow_depth_platform_north_density_calc:standard_name = "surface_snow_thickness" ;
		string snow_depth_platform_north_density_calc:units = "cm" ;
		string snow_depth_platform_north_density_calc:instrument = "Lufft SHM31" ;
		string snow_depth_platform_north_density_calc:instrument_description = "Lufft SHM31 laser snow depth sensor" ;
		string snow_depth_platform_north_density_calc:instrument_location = "on platform - pointed toward ground on north side" ;
		string snow_depth_platform_north_density_calc:sensor_height = "8.2 m" ;
		string snow_depth_platform_north_density_calc:height_reference = "above bare ground" ;
		string snow_depth_platform_north_density_calc:valid_min = "0" ;
		string snow_depth_platform_north_density_calc:valid_max = "1500" ;
		string snow_depth_platform_north_density_calc:processing_method = "sampled every 5 min" ;
		string snow_depth_platform_north_density_calc:additional_info = "sampled region approximately collocated with the SSG snow pillow; Lufft SH31 has maximum range of 15 m; installed in 10/2020; Lufft #2 in database" ;
		string snow_depth_platform_north_density_calc:period_data_availability = "6.6%" ;
		string snow_depth_platform_north_density_calc:additional_QC = "3-h centered rolling mean of snow_depth_platform_north; filtered values <= 0 set to NaN or where filtered SWE from SSG snow pillow <= 0" ;
		string snow_depth_platform_north_density_calc:gap_filling = "None" ;
		string snow_depth_platform_north_density_calc:ancillary_variables = "snow_depth_platform_north, snow_depth_platform_north_data_flag, snow_depth_platform_north_instrument_flag" ;
	float swe_dri_pillow(datetime) ;
		swe_dri_pillow:_FillValue = NaNf ;
		string swe_dri_pillow:long_name = "snow water equivalent (SWE) south of platform" ;
		string swe_dri_pillow:standard_name = "lwe_thickness_of_surface_snow_amount" ;
		string swe_dri_pillow:units = "cm" ;
		string swe_dri_pillow:instrument = "DRI snow pillow" ;
		string swe_dri_pillow:instrument_description = "DRI/Hydrologic Sensors perforated fluidless snow pillow" ;
		string swe_dri_pillow:instrument_location = "on ground south of platform among lysimeters" ;
		string swe_dri_pillow:sensor_height = "0 m" ;
		string swe_dri_pillow:height_reference = "above bare ground" ;
		string swe_dri_pillow:valid_min = "0" ;
		string swe_dri_pillow:valid_max = "300" ;
		string swe_dri_pillow:processing_method = "hourly-averaged measurements were linearly resampled to every 5 min" ;
		string swe_dri_pillow:additional_info = "Desert Research Institute installed in 09/2014 and removed in 09/2018; pillow was labeled DRI snow pillow #3 in CUES database prior to 09/2015 and DRI snow pillow #1 in database thereafter" ;
		string swe_dri_pillow:period_data_availability = "24.7%" ;
		string swe_dri_pillow:additional_QC = "applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string swe_dri_pillow:gap_filling = "None" ;
		string swe_dri_pillow:ancillary_variables = "swe_dri_pillow_data_flag" ;
	int swe_dri_pillow_data_flag(datetime) ;
		string swe_dri_pillow_data_flag:long_name = "DRI snow pillow SWE data point source flags" ;
		string swe_dri_pillow_data_flag:standard_name = "data_value_source_flag" ;
		swe_dri_pillow_data_flag:flag_values = 0b, 1b ;
		swe_dri_pillow_data_flag:valid_range = 0b, 1b ;
		string swe_dri_pillow_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string swe_dri_pillow_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string swe_dri_pillow_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string swe_dri_pillow_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string swe_dri_pillow_data_flag:ancillary_variables = "swe_dri_pillow" ;
	float swe_dwr_pillow(datetime) ;
		swe_dwr_pillow:_FillValue = NaNf ;
		string swe_dwr_pillow:long_name = "snow water equivalent (SWE) near I-beam" ;
		string swe_dwr_pillow:standard_name = "lwe_thickness_of_surface_snow_amount" ;
		string swe_dwr_pillow:units = "cm" ;
		string swe_dwr_pillow:instrument = "DWR snow pillow" ;
		string swe_dwr_pillow:instrument_description = "California Department of Water Resources snow pillow" ;
		string swe_dwr_pillow:instrument_location = "on ground south of platform near I-beam" ;
		string swe_dwr_pillow:sensor_height = "0 m" ;
		string swe_dwr_pillow:height_reference = "above bare ground" ;
		string swe_dwr_pillow:valid_min = "0" ;
		string swe_dwr_pillow:valid_max = "355" ;
		string swe_dwr_pillow:processing_method = "sampled every 5 min; data prior to 10/2016 were converted from voltage (mV) to SWE (cm) as SWE = (voltage - 826 mV)*0.085 cm/mV" ;
		string swe_dwr_pillow:additional_info = "installed in 09/2012 by California DWR; snow on pillow is sampled by the Judd pinger/SNOdar on the remote boom" ;
		string swe_dwr_pillow:period_data_availability = "96.8%" ;
		string swe_dwr_pillow:additional_QC = "manually set erroneously high and low values to NaN; applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string swe_dwr_pillow:gap_filling = "None" ;
		string swe_dwr_pillow:ancillary_variables = "swe_dwr_pillow_data_flag, swe_dwr_pillow_density_calc, snowless_periods_dwr_pillow_flag" ;
	int swe_dwr_pillow_data_flag(datetime) ;
		string swe_dwr_pillow_data_flag:long_name = "DWR snow pillow SWE data point source flags" ;
		string swe_dwr_pillow_data_flag:standard_name = "data_value_source_flag" ;
		swe_dwr_pillow_data_flag:flag_values = 0b, 1b ;
		swe_dwr_pillow_data_flag:valid_range = 0b, 1b ;
		string swe_dwr_pillow_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string swe_dwr_pillow_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string swe_dwr_pillow_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string swe_dwr_pillow_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string swe_dwr_pillow_data_flag:ancillary_variables = "swe_dwr_pillow" ;
	int snowless_periods_dwr_pillow_flag(datetime) ;
		string snowless_periods_dwr_pillow_flag:long_name = "manually identified periods without snow on DWR snow pillow" ;
		string snowless_periods_dwr_pillow_flag:standard_name = "surface_snow_binary_mask" ;
		snowless_periods_dwr_pillow_flag:flag_values = 0LL, 1LL ;
		snowless_periods_dwr_pillow_flag:valid_range = 0LL, 1LL ;
		string snowless_periods_dwr_pillow_flag:flag_meanings_short = "snow pillow is or may be covered by snow", "snow pillow is clear of snow cover" ;
		string snowless_periods_dwr_pillow_flag:flag_meaning_0 = "snow pillow is either confirmed to be snow covered, snow is actively falling, or snow presence on pillow cannot be determined from webcam" ;
		string snowless_periods_dwr_pillow_flag:flag_meaning_1 = "snow pillow confirmed to be clear of snow cover from webcam" ;
		string snowless_periods_dwr_pillow_flag:additional_info = "snow presence on pillow determined from archived CUES webcam imagery; imagery not available at night or between 01/2018 and 09/2018" ;
		string snowless_periods_dwr_pillow_flag:ancillary_variables = "snow_density_dwr_pillow" ;
	float swe_dwr_pillow_density_calc(datetime) ;
		swe_dwr_pillow_density_calc:_FillValue = NaNf ;
		string swe_dwr_pillow_density_calc:long_name = "snow water equivalent (SWE) near I-beam - filtered for snow density calculation" ;
		string swe_dwr_pillow_density_calc:standard_name = "lwe_thickness_of_surface_snow_amount" ;
		string swe_dwr_pillow_density_calc:units = "cm" ;
		string swe_dwr_pillow_density_calc:instrument = "DWR snow pillow" ;
		string swe_dwr_pillow_density_calc:instrument_description = "California Department of Water Resources snow pillow" ;
		string swe_dwr_pillow_density_calc:instrument_location = "on ground south of platform near I-beam" ;
		string swe_dwr_pillow_density_calc:sensor_height = "0 m" ;
		string swe_dwr_pillow_density_calc:height_reference = "above bare ground" ;
		string swe_dwr_pillow_density_calc:valid_min = "0" ;
		string swe_dwr_pillow_density_calc:valid_max = "355" ;
		string swe_dwr_pillow_density_calc:processing_method = "sampled every 5 min; data prior to 10/2016 were converted from voltage (mV) to SWE (cm) as SWE = (voltage - 826 mV)*0.085 cm/mV" ;
		string swe_dwr_pillow_density_calc:additional_info = "installed in 09/2012 by California DWR; snow on pillow is sampled by the Judd pinger/SNOdar on the remote boom" ;
		string swe_dwr_pillow_density_calc:period_data_availability = "61.1%" ;
		string swe_dwr_pillow_density_calc:additional_QC = "3-h centered rolling mean of swe_dwr_pillow; filtered values <= 0 set to NaN or where filtered snow depth from remote boom <= 0" ;
		string swe_dwr_pillow_density_calc:gap_filling = "None" ;
		string swe_dwr_pillow_density_calc:ancillary_variables = "swe_dwr_pillow_data_flag, swe_dwr_pillow, snowless_periods_dwr_pillow_flag" ;
	float swe_ssg_pillow(datetime) ;
		swe_ssg_pillow:_FillValue = NaNf ;
		string swe_ssg_pillow:long_name = "snow water equivalent (SWE) north of platform" ;
		string swe_ssg_pillow:standard_name = "lwe_thickness_of_surface_snow_amount" ;
		string swe_ssg_pillow:units = "cm" ;
		string swe_ssg_pillow:instrument = "Sommer SSG-2 snow pillow" ;
		string swe_ssg_pillow:instrument_description = "perforated fluidless snow pillow" ;
		string swe_ssg_pillow:instrument_location = "on ground north of platform near lysimeters" ;
		string swe_ssg_pillow:sensor_height = "0 m" ;
		string swe_ssg_pillow:height_reference = "above bare ground" ;
		string swe_ssg_pillow:valid_min = "0" ;
		string swe_ssg_pillow:valid_max = "100" ;
		string swe_ssg_pillow:processing_method = "1-min measurements were resampled to every 5 min" ;
		string swe_ssg_pillow:additional_info = "installed in 09/2024; snow on pillow is sampled by the north-pointing Lufft SHM31 laser depth sensor" ;
		string swe_ssg_pillow:period_data_availability = "7.6%" ;
		string swe_ssg_pillow:additional_QC = "applied Hampel filter with 6-h centered running median to filter points beyond +- 3 standard deviations" ;
		string swe_ssg_pillow:gap_filling = "None" ;
		string swe_ssg_pillow:ancillary_variables = "swe_ssg_pillow_data_flag, swe_ssg_pillow_density_calc, snowless_periods_ssg_pillow_flag" ;
	int swe_ssg_pillow_data_flag(datetime) ;
		string swe_ssg_pillow_data_flag:long_name = "SSG snow pillow SWE data point source flags" ;
		string swe_ssg_pillow_data_flag:standard_name = "data_value_source_flag" ;
		swe_ssg_pillow_data_flag:flag_values = 0b, 1b ;
		swe_ssg_pillow_data_flag:valid_range = 0b, 1b ;
		string swe_ssg_pillow_data_flag:flag_meanings_short = "data value unchanged from raw dataset", "data value replaced by running median during filtering procedure" ;
		string swe_ssg_pillow_data_flag:flag_meaning_0 = "data value unchanged from raw dataset" ;
		string swe_ssg_pillow_data_flag:flag_meaning_1 = "data value was replaced by running median during Hampel and/or manual filtering procedure" ;
		string swe_ssg_pillow_data_flag:additional_info = "data points replaced by NaNs during filtering procedures are not flagged" ;
		string swe_ssg_pillow_data_flag:ancillary_variables = "swe_ssg_pillow" ;
	int snowless_periods_ssg_pillow_flag(datetime) ;
		string snowless_periods_ssg_pillow_flag:long_name = "manually identified periods without snow on SSG snow pillow" ;
		string snowless_periods_ssg_pillow_flag:standard_name = "surface_snow_binary_mask" ;
		snowless_periods_ssg_pillow_flag:flag_values = 0LL, 1LL ;
		snowless_periods_ssg_pillow_flag:valid_range = 0LL, 1LL ;
		string snowless_periods_ssg_pillow_flag:flag_meanings_short = "snow pillow is or may be covered by snow", "snow pillow is clear of snow cover" ;
		string snowless_periods_ssg_pillow_flag:flag_meaning_0 = "snow pillow is either confirmed to be snow covered, snow is actively falling, or snow presence on pillow cannot be determined from webcam" ;
		string snowless_periods_ssg_pillow_flag:flag_meaning_1 = "snow pillow confirmed to be clear of snow cover from webcam" ;
		string snowless_periods_ssg_pillow_flag:additional_info = "snow presence on pillow determined from archived CUES webcam imagery; imagery not available at night or between 01/2018 and 09/2018" ;
		string snowless_periods_ssg_pillow_flag:ancillary_variables = "snow_density_dwr_pillow" ;
	float swe_ssg_pillow_density_calc(datetime) ;
		swe_ssg_pillow_density_calc:_FillValue = NaNf ;
		string swe_ssg_pillow_density_calc:long_name = "snow water equivalent (SWE) north of platform - filtered for snow density calculation" ;
		string swe_ssg_pillow_density_calc:standard_name = "lwe_thickness_of_surface_snow_amount" ;
		string swe_ssg_pillow_density_calc:units = "cm" ;
		string swe_ssg_pillow_density_calc:instrument = "Sommer SSG-2 snow pillow" ;
		string swe_ssg_pillow_density_calc:instrument_description = "perforated fluidless snow pillow" ;
		string swe_ssg_pillow_density_calc:instrument_location = "on ground north of platform near lysimeters" ;
		string swe_ssg_pillow_density_calc:sensor_height = "0 m" ;
		string swe_ssg_pillow_density_calc:height_reference = "above bare ground" ;
		string swe_ssg_pillow_density_calc:valid_min = "0" ;
		string swe_ssg_pillow_density_calc:valid_max = "100" ;
		string swe_ssg_pillow_density_calc:processing_method = "1-min measurements were resampled to every 5 min" ;
		string swe_ssg_pillow_density_calc:additional_info = "installed in 09/2024; snow on pillow is sampled by the north-pointing Lufft SHM31 laser depth sensor" ;
		string swe_ssg_pillow_density_calc:period_data_availability = "6.6%" ;
		string swe_ssg_pillow_density_calc:additional_QC = "3-h centered rolling mean of swe_ssg_pillow; filtered values <= 0 set to NaN or where filtered snow depth from north platform Lufft sensor <= 0" ;
		string swe_ssg_pillow_density_calc:gap_filling = "None" ;
		string swe_ssg_pillow_density_calc:ancillary_variables = "swe_ssg_pillow_data_flag, swe_ssg_pillow, snowless_periods_ssg_pillow_flag" ;
	float snow_density_dwr_pillow(datetime) ;
		snow_density_dwr_pillow:_FillValue = NaNf ;
		string snow_density_dwr_pillow:long_name = "snow bulk density " ;
		string snow_density_dwr_pillow:standard_name = "surface_snow_density" ;
		string snow_density_dwr_pillow:units = "kg m-3" ;
		string snow_density_dwr_pillow:instrument_swe = "DWR snow pillow" ;
		string snow_density_dwr_pillow:instrument_depth = "Judd Communications depth sensor; SensorLogic SNOdar" ;
		string snow_density_dwr_pillow:location = "on ground south of platform near I-beam" ;
		string snow_density_dwr_pillow:sensor_height = "0 m" ;
		string snow_density_dwr_pillow:height_reference = "above bare ground" ;
		string snow_density_dwr_pillow:valid_min = "0" ;
		string snow_density_dwr_pillow:valid_max = "1000" ;
		string snow_density_dwr_pillow:processing_method = "derived from filtered remote boom snow depth & DWR snow pillow SWE measurements" ;
		string snow_density_dwr_pillow:additional_info = "erroneous values remain in periods with minimal non-zero snow depth and/or SWE; these should be further removed at the users\' discretion" ;
		string snow_density_dwr_pillow:period_data_availability = "57.9%" ;
		string snow_density_dwr_pillow:additional_QC = "snow density values > 1000 kg m-3 were set to NaN; values were masked during known snowless periods (identified by CUES webcam)" ;
		string snow_density_dwr_pillow:gap_filling = "None" ;
		string snow_density_dwr_pillow:ancillary_variables = "swe_dwr_pillow_density_calc, snow_depth_remote_boom_density_calc, snowless_periods_dwr_pillow_flag" ;
	float snow_density_ssg_pillow(datetime) ;
		snow_density_ssg_pillow:_FillValue = NaNf ;
		string snow_density_ssg_pillow:long_name = "snow bulk density" ;
		string snow_density_ssg_pillow:standard_name = "surface_snow_density" ;
		string snow_density_ssg_pillow:units = "kg m-3" ;
		string snow_density_ssg_pillow:instrument_swe = "Sommer SSG-2 snow pillow" ;
		string snow_density_ssg_pillow:instrument_depth = "Lufft SHM31 laser snow depth sensor" ;
		string snow_density_ssg_pillow:location = "on ground north of platform near lysimeters" ;
		string snow_density_ssg_pillow:sensor_height = "0 m" ;
		string snow_density_ssg_pillow:height_reference = "above bare ground" ;
		string snow_density_ssg_pillow:valid_min = "0" ;
		string snow_density_ssg_pillow:valid_max = "1000" ;
		string snow_density_ssg_pillow:processing_method = "derived from filtered north platform snow depth & SSG snow pillow SWE measurements" ;
		string snow_density_ssg_pillow:additional_info = "erroneous values remain in periods with minimal non-zero snow depth and/or SWE; these should be further removed at the users\' discretion" ;
		string snow_density_ssg_pillow:period_data_availability = "5.5%" ;
		string snow_density_ssg_pillow:additional_QC = "snow density values > 1000 kg m-3 were set to NaN; values were masked during known snowless periods (identified by CUES webcam)" ;
		string snow_density_ssg_pillow:gap_filling = "None" ;
		string snow_density_ssg_pillow:ancillary_variables = "swe_ssg_pillow_density_calc, snow_depth_platform_north_density_calc, snowless_periods_ssg_pillow_flag" ;
	int64 datetime(datetime) ;
		string datetime:units = "minutes since 2015-01-01" ;
		string datetime:calendar = "proleptic_gregorian" ;

// global attributes:
		string :station_name = "Jeff Dozier Snow Study Site" ;
		string :station_info = "Formerly the CRREL UCSB Energy Site (CUES), https://snow.ucsb.edu/" ;
		string :station_location = "Mammoth Mountain, CA, USA" ;
		string :station_latitude = "37.6431" ;
		string :station_longitude = "-119.0291" ;
		string :station_elevation = "2936 m" ;
		string :period_start = "2015-01-01" ;
		string :period_end = "2025-06-30" ;
		string :time_zone = "America/PST" ;
		string :time_zone_offset = "UTC-8" ;
		string :created_by = "Manda Chasteen, Leidos" ;
		string :contact_info = "manda.chasteen@leidos.com, edward.h.bair@leidos.com" ;
		string :created_date = "2025-08-12" ;
		string :last_modified = "2025-08-12" ;
		string :data_interval = "5 min" ;
}