Dataset
Met Éireann LIDARNET Knock Airport Vaisala CL31 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: 2017-08-25
Download Stats: last 12 months
Dataset Size: 55.26K Files | 57GB
Abstract
Cloud base and backscatter data from the Met Éireann's Knock Airport Cl31 ceilometer located at Knock Airport, Charlestown, County Mayo, northwest Ireland. The Met Éireann'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 Éireann (2017): Met Éireann LIDARNET Knock Airport Vaisala CL31 ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/d73b6fb4fcfa4dfd844227c5b9475a94/
Abbreviation: Not defined
Keywords: Met Éireann, lidar, ceilometer, ash
Details
| Previous Info: |
No news update for this record
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|---|---|
| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
Use of these data is covered by the following licence(s): http://creativecommons.org/licenses/by/4.0/ 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 Éireann 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
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Process overview
This dataset was generated by instruments deployed on platforms as listed below.
Instrument/Platform pairings
| Met Éireann: Vaisala CL31 Ceilometer | Deployed on: Met Éireann Knock Airport meteorological station |
| Output Description | None |
- 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
- 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
Coverage
Temporal Range
Start time:
2016-12-15T12:00:00
End time:
Ongoing
Geographic Extent
53.9000° |
||
-8.8170° |
-8.8170° |
|
53.9000° |
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