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Dataset

 

Met Éireann LIDARNET Shannon Vaisala CT25k ceilometer cloud base and backscatter data

Update Frequency: Daily
Latest Data Update: 2018-02-08
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-07-30
Download Stats: last 12 months
Dataset Size: 1.36K Files | 5GB
Abstract

Cloud base and backscatter data from the Met Éireann's Vaisala Ct25k ceilometer located at Shannon, South West, 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 (2015): Met Éireann LIDARNET Shannon Vaisala CT25k ceilometer cloud base and backscatter data. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/059c89d97d634ca89c57433c3deff69d
Abbreviation: met-eireann-vaisala-ct25k-ceilometer_shannon
Keywords: Met Éireann, lidar, ceilometer, ash

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: https://creativecommons.org/licenses/by-sa/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 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

Related Documents

 Met Office LIDARNET backscatter visualisation map
 Daily plots of Met Éireann LIDARNET Shannon Vaisala CT25k ceilometer cloud base and backscatter data

Process overview

This dataset was generated by instruments deployed on platforms as listed below.
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: (10000 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
  • units: %
  • long_name: Receiver sensitivity as a percentage of nominal factory setting
  • var_id: receiver_sensitivity
  • names: Receiver sensitivity as a percentage of nominal factory setting
  • 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 32bit unsigned int
  • names: System messages still encoded as a 32bit unsigned int
  • units: km
  • var_id: visibility
  • long_name: Visibility in air
  • names: Visibility in air
  • 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:
2015-07-13T23:00:06
End time:
Ongoing
Geographic Extent

 
52.6900°
  
-8.9200°
  
-8.9200°
 
52.6900°
  
Related parties
Authors (1)
Publishers (1)
Funders (1)