Metadata description

There is a range of metadata contained within the HYPERNETS product files. For each variable, there is metadata such as the standard name, long name, units and uncertainty components (where relevant). The uncertainty variables will have additional metadata describing their error correlation (see Uncertainty Propagation and Using HYPERNETS data). Finally, there is also a range of global metadata, describing information about how, and when the data was processed, what data files were used, information about the site (e.g., latitude and longitude), etc. The full list of global metadata fields is provided in Table 1.

Table 1: Table of global metadata fields. The metadata listed as common are present in all product files

Level	network	metadata field
common	both	type
common	both	abstract
common	both	conventions
common	both	format_version
common	both	netcdf_version
common	both	processor_name
common	both	processor_version
common	both	processor_atbd
common	both	product_name
common	both	data_created
common	both	references
common	both	source
common	both	comment
common	both	easting
common	both	northing
common	both	acknowledgement
common	both	project_name
common	both	language
common	both	operational_status
common	both	limitations
common	both	licence
common	both	conformity
common	both	lineage
common	both	instrument_configuration_file
common	both	history
common	both	processor_configuration_file
common	both	sequence_id
common	both	system_id
common	both	site_id
common	both	site_latitude
common	both	site_longitude
common	both	source_file
common	both	system_temperature
common	both	system_pressure
common	both	illuminance
common	both	system_relative_humidity
common	both	instrument_id
common	both	pointing_system_id
common	both	calibration_device_id
common	both	irr_vis_head_id
common	both	rad_vis_head_id
common	both	rain_sensor_id
common	both	rgb_camera_id
common	both	topic_category
common	both	keyword
common	both	locator
common	both	responsible_party
common	both	creator_name
common	both	creator_email
common	both	title
L1A_RAD/L1B_RAD/L1C_ALL/L2A_REF	both	instrument_calibration_file_rad
L1A_IRR/L1B_IRR/L1C_ALL/L2A_REF	both	instrument_calibration_file_irr
L1C_ALL/L2A_REF	W	rhof_option
L1C_ALL/L2A_REF	W	rhof_wind_source
L1C_ALL/L2A_REF	W	similarity_waveref
L1C_ALL/L2A_REF	W	similarity_wavethres
L1C_ALL/L2A_REF	W	similarity_wavelen1
L1C_ALL/L2A_REF	W	similarity_wavelen2
L1C_ALL/L2A_REF	W	similarity_alpha