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Met Office LIDARNET Dishforth Vaisala CL31 ceilometer cloud base and backscatter data

Update Frequency: Daily
Latest Data Update: 2016-09-08
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-29
Download Stats: last 12 months
Dataset Size: 7.75K Files | 4GB


Cloud base and backscatter data from the Met Office's Dishforth Cl31 ceilometer located at Dishforth, North Yorkshire. The Met Office's laser cloud base recorders network (LCBRs), or ceilometers, returns a range of products for use in forecasting and hazard detection. The backscatter profiles can allow detection of aerosol species such as volcanic ash where suitable instrumentation is deployed.

Citable as:  Met Office (2015): Met Office LIDARNET Dishforth Vaisala CL31 ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation.
Abbreviation: metoffice-vaisala-cl31-ceilometer_dishforth
Keywords: Met Office, lidar, ceilometer, ash


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were collected by the Met Office before processed through the Met Office's Hermes system. A copy of these data were then delivered by the Met Office to CEDA for archiving.

File Format:
Data are netCDF formatted

Process overview

This dataset was generated by instruments deployed on platforms as listed below.

Instrument/Platform pairings

Met Office: Vaisala CL31 Ceilometer Deployed on: RAF Dishforth Airfield, UK
Output Description


  • units: degrees
  • long_name: Angle instrument is offset from vertical
  • var_id: tilt
  • units: m-1 sr-1
  • long_name: Attenuated backscatter coefficient
  • var_id: beta
  • units: mV
  • var_id: background
  • long_name: Background light, millivolts at internal ADC input
  • var_id: beta_raw
  • long_name: Backscatter
  • units: (100000 km sr)-1
  • long_name: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
  • var_id: record
  • units: km
  • long_name: Height of cloudbases
  • var_id: CBH
  • units: km
  • long_name: Highest signal detected
  • var_id: highest_signal_detected
  • units: nm
  • var_id: wavelength
  • long_name: LCBR wavelength
  • units: %
  • long_name: Laser pulse energy, % of nominal factory setting
  • var_id: pulse_energy
  • units: J
  • long_name: Nominal laser pulse energy
  • var_id: nominal_pulse_energy
  • var_id: range
  • units: km
  • long_name: Range from antenna to the centre of each range gate
  • long_name: Range to the centre of each range gate
  • var_id: range
  • units: km
  • long_name: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
  • var_id: display_scaler
  • long_name: System messages
  • var_id: messages
  • var_id: message_bits
  • long_name: System messages still encoded as a 48bit unsigned int
  • units: km
  • var_id: visibility
  • long_name: Visibility in air
  • units: %
  • long_name: Window transmission estimate % (0 ... 100)
  • var_id: window_tau
  • units: m
  • standard_name: altitude
  • var_id: altitude
  • long_name: height of ground level above mean sea level

Co-ordinate Variables

  • standard_name: time
  • var_id: time
  • long_name: Decimal hours from midnight UTC to the end of the measurement period
  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude
  • long_name: latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • long_name: longitude
Temporal Range
Start time:
End time:
Geographic Extent

Related parties
Authors (1)
Funders (1)