netcdf ESA-FRM4DOAS-L1-INSTITUTE-STATION-STATIONNUMBER-CHANNELNUMBER-YYYYMMDDTHHMMSSZ-YYYYMMDDTHHMMSSZ-fv002 {
dimensions:
	detector_size =  ;
	number_of_records =  ;
	slit_dimx =  ;
	slit_dimy =  ;
	datetime_size =  ;
	dim1_size =  ;

// global attributes:
		:title = "Level-1 data for the FRM4DOAS MAXDOAS processor" ;
		:Conventions = "CF-1.6" ;
		:source = "" ;
		:instrument_number = "" ;
		:instrument_channel = "" ;
		:instrument_type = "maxdoas" ;
		:institution = "" ;
		:pi_name = "" ;
		:pi_email = "" ;
		:do_name = "" ;
		:do_email = "" ;
		:ds_name = "" ;
		:ds_email = "" ;
		:station_name = "" ;
		:time_coverage_start = "" ;
		:time_coverage_end = "" ;
		:project_name = "FRM4DOAS" ;
		:file_name_prefix = "ESA" ;
		:file_type = "L1" ;
		:file_version = "002" ;

group: ANCILLARY {
  } // group ANCILLARY

group: INSTRUMENT_LOCATION {
  variables:
  	float altitude(dim1_size) ;
  		altitude:_FillValue = NaNf ;
  		altitude:units = "m" ;
  		altitude:long_name = "altitude of the instrument above sea level" ;
  		altitude:standard_name = "altitude" ;
  	float altitude_of_station(dim1_size) ;
  		altitude_of_station:_FillValue = NaNf ;
  		altitude_of_station:units = "m" ;
  		altitude_of_station:long_name = "altitude of the station above sea level " ;
  		altitude_of_station:standard_name = "ground_level_altitude" ;
  	float latitude(dim1_size) ;
  		latitude:_FillValue = NaNf ;
  		latitude:units = "degree_north" ;
  		latitude:long_name = "Latitude of the instrument (positive north)" ;
  		latitude:standard_name = "latitude" ;
  	float longitude(dim1_size) ;
  		longitude:_FillValue = NaNf ;
  		longitude:units = "degree_east" ;
  		longitude:long_name = "Longitude of the instrument (positive east)" ;
  		longitude:standard_name = "longitude" ;
  } // group INSTRUMENT_LOCATION

group: KEYDATA {

  group: SLIT_FUNCTION {
    variables:
    	float slit_function(slit_dimx, slit_dimy) ;
    		slit_function:_FillValue = NaNf ;
    		slit_function:units = "1" ;
    		slit_function:long_name = "measured slit function(s)" ;
    		slit_function:missing_value = NaNf ;
    	float slit_function_relative_wavelength(slit_dimx) ;
    		slit_function_relative_wavelength:_FillValue = NaNf ;
    		slit_function_relative_wavelength:units = "nm" ;
    		slit_function_relative_wavelength:long_name = "relative wavelength grid" ;
    		slit_function_relative_wavelength:missing_value = NaNf ;
    	float slit_function_measured_wavelength(dim1_size, slit_dimy) ;
    		slit_function_measured_wavelength:_FillValue = NaNf ;
    		slit_function_measured_wavelength:units = "nm" ;
    		slit_function_measured_wavelength:long_name = "wavelengths at which the slit function has been measured" ;
    		slit_function_measured_wavelength:missing_value = NaNf ;
    } // group SLIT_FUNCTION
  } // group KEYDATA

group: RADIANCE {

  group: OBSERVATIONS {
    variables:
    	float wavelength(number_of_records, detector_size) ;
    		wavelength:_FillValue = NaNf ;
    		wavelength:units = "nm" ;
    		wavelength:long_name = "wavelength grid (in air)" ;
    	float radiance(number_of_records, detector_size) ;
    		radiance:_FillValue = NaNf ;
    		radiance:units = "1" ;
    		radiance:long_name = "sum of co-added spectra (count number)" ;
    		radiance:missing_value = NaNf ;
    	short radiance_quality_flag(number_of_records, detector_size) ;
    		radiance_quality_flag:_FillValue = -1s ;
    		radiance_quality_flag:units = "1" ;
    		radiance_quality_flag:long_name = "pixel quality flags (currently 0 or 1 but probably to complete later)" ;
    		radiance_quality_flag:missing_value = 1s ;
    	float exposure_time(number_of_records) ;
    		exposure_time:_FillValue = NaNf ;
    		exposure_time:units = "s" ;
    		exposure_time:long_name = "exposure time" ;
    	short number_of_coadded_spectra(number_of_records) ;
    		number_of_coadded_spectra:_FillValue = -1s ;
    		number_of_coadded_spectra:units = "1" ;
    		number_of_coadded_spectra:long_name = "number of co-added spectra" ;
    	short datetime(number_of_records, datetime_size) ;
    		datetime:_FillValue = -1s ;
    		datetime:units = "1" ;
    		datetime:long_name = "measurement date and time (UT YYYY,MM,DD,hh,mm,ss,ms)" ;
    	short datetime_start(number_of_records, datetime_size) ;
    		datetime_start:_FillValue = -1s ;
    		datetime_start:units = "1" ;
    		datetime_start:long_name = "start date and time (UT YYYY,MM,DD,hh,mm,ss,ms)" ;
    	short datetime_end(number_of_records, datetime_size) ;
    		datetime_end:_FillValue = -1s ;
    		datetime_end:units = "1" ;
    		datetime_end:long_name = "end date and time (UT YYYY,MM,DD,hh,mm,ss,ms)" ;
    	float total_acquisition_time(number_of_records) ;
    		total_acquisition_time:_FillValue = NaNf ;
    		total_acquisition_time:units = "s" ;
    		total_acquisition_time:long_name = "total acquisition time (the total time the detector is exposed to light to produce the spectrum)" ;
    	float total_measurement_time(number_of_records) ;
    		total_measurement_time:_FillValue = NaNf ;
    		total_measurement_time:units = "s" ;
    		total_measurement_time:long_name = "total measurement time (should be the time difference in seconds between UTC time start and UTC time stop)" ;
    		total_measurement_time:missing_value = NaNf ;
    	short measurement_type(number_of_records) ;
    		measurement_type:_FillValue = -1s ;
    		measurement_type:units = "1" ;
    		measurement_type:long_name = "measurement type : 1-offaxis, 2-direct sun, 3-zenith, 7-almucantar, 11-horizon, 12-direct moon" ;
    	short scan_index(number_of_records) ;
    		scan_index:_FillValue = -1s ;
    		scan_index:units = "1" ;
    		scan_index:long_name = "scan index" ;
    	short index_zenith_before(number_of_records) ;
    		index_zenith_before:_FillValue = -1s ;
    		index_zenith_before:units = "1" ;
    		index_zenith_before:long_name = "for offaxis measurements, index of the zenith record before the scan that can be used for sequential analysis" ;
    	short index_zenith_after(number_of_records) ;
    		index_zenith_after:_FillValue = -1s ;
    		index_zenith_after:units = "1" ;
    		index_zenith_after:long_name = "for offaxis measurements, index of the zenith record after the scan that can be used for sequential analysis" ;
    } // group OBSERVATIONS

  group: GEODATA {
    variables:
    	float viewing_elevation_angle(number_of_records) ;
    		viewing_elevation_angle:_FillValue = NaNf ;
    		viewing_elevation_angle:units = "degree" ;
    		viewing_elevation_angle:long_name = "viewing elevation angle" ;
    	float viewing_azimuth_angle(number_of_records) ;
    		viewing_azimuth_angle:_FillValue = NaNf ;
    		viewing_azimuth_angle:units = "degree" ;
    		viewing_azimuth_angle:long_name = "viewing azimuth angle 0..360, measured towards the east, from north" ;
    		viewing_azimuth_angle:standard_name = "sensor_azimuth_angle" ;
    	float solar_zenith_angle(number_of_records) ;
    		solar_zenith_angle:_FillValue = NaNf ;
    		solar_zenith_angle:units = "degree" ;
    		solar_zenith_angle:long_name = "solar zenith angle" ;
    		solar_zenith_angle:standard_name = "solar_zenith_angle" ;
    	float solar_azimuth_angle(number_of_records) ;
    		solar_azimuth_angle:_FillValue = NaNf ;
    		solar_azimuth_angle:units = "degree" ;
    		solar_azimuth_angle:long_name = "solar azimuth angle, 0..360, measured towards the east, from north" ;
    		solar_azimuth_angle:standard_name = "solar_azimuth_angle" ;
    } // group GEODATA
  } // group RADIANCE
}