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Met Office LIDARNET Coningsby Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data

Update Frequency: Daily
Latest Data Update: 2023-06-19
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-29
Download Stats: last 12 months
Dataset Size: 255.22K Files | 120GB


Cloud base and backscatter data from the Met Office's Jenoptik CHM15k Nimbus ceilometer located at Coningsby, Lincolnshire. 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 Coningsby Jenoptik CHM15k Nimbus ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation.
Abbreviation: metoffice-jenoptick-chm15k-nimbus-ceilometer_coningsby
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: Lufft CHM15k Nimbus Ceilometer Deployed on: RAF Coningsby, UK
Output Description


  • units: m-1 sr-1
  • long_name: Attenuated backscatter coefficient
  • var_id: beta
  • units: m-1 sr-1
  • long_name: Attenuated backscatter coefficient - high resolution mode
  • var_id: beta_hr
  • units: m-1 sr-1
  • long_name: Attenuated backscatter coefficient error
  • var_id: beta_error
  • units: m-1 sr-1
  • long_name: Attenuated backscatter coefficient error - high resolution mode
  • var_id: beta_error_hr
  • units: ms
  • long_name: Average time per profile
  • var_id: average_time
  • var_id: beta_raw
  • long_name: Backscatter
  • units: oktas
  • long_name: Base cloud cover
  • var_id: BCC
  • long_name: Calibration factor applied in attenuated backscatter coefficient calculation
  • var_id: calibration_factor
  • units: km
  • long_name: Cloud base height variation (STD)
  • var_id: CBE
  • units: m
  • var_id: CDP
  • long_name: Cloud depth
  • units: m
  • long_name: Cloud depth variation
  • var_id: CDE
  • units: m
  • long_name: Cloud height offset
  • var_id: CHO
  • 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: nm
  • var_id: wavelength
  • long_name: LCBR wavelength
  • var_id: azimuth
  • long_name: Laser direction of site
  • units: degree-clockwise
  • units: m
  • long_name: Maximum detection height
  • var_id: MXD
  • units: J
  • long_name: Nominal laser pulse energy
  • var_id: nominal_pulse_energy
  • long_name: Number of laser pulses for each profile
  • var_id: npulses
  • long_name: Overlap function
  • var_id: overlap
  • long_name: Overlap function - high resolution mode
  • var_id: overlap_hr
  • long_name: Quality score for aerosol Layer in PBL
  • var_id: PBS
  • var_id: range
  • units: km
  • long_name: Range from antenna to the centre of each range gate
  • units: km
  • long_name: Range from instrument to top of boundary layer
  • var_id: PBL
  • long_name: Range to the centre of each range gate
  • var_id: range
  • units: km
  • units: km
  • long_name: Range to the centre of each range gate in high resolution mode
  • var_id: range_hr
  • long_name: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
  • var_id: display_scaler
  • long_name: Sky Condition Index
  • var_id: SCI
  • long_name: System messages encoded as a 31bit unsigned int
  • var_id: message_bits
  • long_name: Total cloud cover
  • var_id: TCC
  • units: oktas
  • units: km
  • var_id: visibility
  • long_name: Visibility in air
  • units: km
  • long_name: Visibility in air error (STD).
  • var_id: visibility_error
  • 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)