Dataset
Met Office LIDARNET Cranwell Vaisala CL31 ceilometer cloud base and backscatter data
Update Frequency: Daily
Latest Data Update: 2025-01-17
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-29
Download Stats: last 12 months
Dataset Size: 85.85K Files | 44GB
Latest Info:
2025-12-09:
This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our latest news items for updates. - if you require a…
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Abstract
Cloud base and backscatter data from the Met Office's Cranwell Cl31 ceilometer located at Cranwell, 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 Cranwell Vaisala CL31 ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/325bb08ec6784b76b3daa37ce7147312
Abbreviation: metoffice-vaisala-cl31-ceilometer_cranwell
Keywords: Met Office, lidar, ceilometer, ash
Details
| Previous Info: |
2025-12-09 This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our … Show More 2025-12-09 This dataset is temporarily unavailable for download from the CEDA archive. We are working on restoring access. Please see our latest news items for updates. - if you require access to this data in the meantime then please contact the CEDA helpdesk. Show Less |
|---|---|
| Previously used record identifiers: |
No related previous identifiers.
|
| Access rules: |
These data have multiple licences for different applications. Always make sure to read the appropriate licence for full data usage limitations details. Other usage may not be permitted.
Restricted data: please submit an application using the REQUEST ACCESS link for access. Use of these data is covered by the following licence(s): https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement.pdf https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement_gov.pdf 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 Cranwell, UK |
| Output Description | None |
- units: degrees
- long_name: Angle instrument is offset from vertical
- var_id: tilt
- names: Angle instrument is offset from vertical
- units: m-1 sr-1
- long_name: Attenuated backscatter coefficient
- var_id: beta
- names: Attenuated backscatter coefficient
- units: mV
- var_id: background
- long_name: Background light, millivolts at internal ADC input
- names: Background light, millivolts at internal ADC input
- var_id: beta_raw
- long_name: Backscatter
- units: (100000 km sr)-1
- names: Backscatter
- long_name: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
- var_id: record
- names: Decimal days since Jan. 1, 4713 B.C.E. 12:00:00 +00:00
- units: km
- long_name: Height of cloudbases
- var_id: CBH
- names: Height of cloudbases
- units: km
- long_name: Highest signal detected
- var_id: highest_signal_detected
- names: Highest signal detected
- units: nm
- var_id: wavelength
- long_name: LCBR wavelength
- names: LCBR wavelength
- units: %
- long_name: Laser pulse energy, % of nominal factory setting
- var_id: pulse_energy
- names: Laser pulse energy, % of nominal factory setting
- units: J
- long_name: Nominal laser pulse energy
- var_id: nominal_pulse_energy
- names: Nominal laser pulse energy
- var_id: range
- units: km
- long_name: Range from antenna to the centre of each range gate
- names: 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
- names: Range to the centre of each range gate
- long_name: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
- var_id: display_scaler
- names: Scale factor to be applied to attenuated backscatter for forecaster display purposes only
- long_name: System messages
- var_id: messages
- names: System messages
- var_id: message_bits
- long_name: System messages still encoded as a 48bit unsigned int
- names: System messages still encoded as a 48bit unsigned int
- units: km
- var_id: visibility
- long_name: Visibility in air
- names: Visibility in air
- units: %
- long_name: Window transmission estimate % (0 ... 100)
- var_id: window_tau
- names: Window transmission estimate % (0 ... 100)
- units: m
- standard_name: altitude
- var_id: altitude
- long_name: height of ground level above mean sea level
- names: altitude, 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
- names: time, Decimal hours from midnight UTC to the end of the measurement period
- units: degrees_north
- standard_name: latitude
- var_id: latitude
- long_name: latitude
- names: latitude
- units: degrees_east
- standard_name: longitude
- var_id: longitude
- long_name: longitude
- names: longitude
Coverage
Temporal Range
Start time:
2015-07-13T08:00:26
End time:
Ongoing
Geographic Extent
53.0330° |
||
-0.5000° |
-0.5000° |
|
53.0330° |
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