602f11d9a2034dae9d0a7356f9aeaf45 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 001b9640fdb1453aa95a222ba423580e dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-04-12T02:18:23 UK GEMINI 2.3 WGS 84 The Disdrometer Verification Network (DiVeN): particle diameter and fall velocity measurements from a network of Thies Laser Precipitation Monitors around the UK (2017-2019) 2019-10-29T11:25:16 publication 2019-10-29T11:25:16 creation https://catalogue.ceda.ac.uk/uuid/602f11d9a2034dae9d0a7356f9aeaf45 602f11d9a2034dae9d0a7356f9aeaf45 Centre for Environmental Data Analysis (CEDA) http://dx.doi.org/10.5285/602f11d9a2034dae9d0a7356f9aeaf45 doi Starting in February 2017, a network of 14 Thies™ manufactured Laser Precipitation Monitors (LPMs) were installed at various locations around the United Kingdom to create the Disdrometer Verification Network (DiVeN). The instruments were installed for verification of radar hydrometeor classification algorithms but are valuable for much wider use in the scientific and operational meteorological community. Every Thies LPM is able to designate each observed hydrometeor into one of 20 diameter bins from >= 0.125 mm to > 8 mm, and one of 22 speed bins from > 0.0 m s-1 to > 20.0 m s-1. A laser and diode receiver operate in tandem; a falling particle will occlude the beam. The duration of the occlusion and the maximum extent (measured by diode voltage) determines the fall velocity and diameter respectively. Using empirically-derived relationships, the instrument classifies precipitation into one of 11 possible hydrometeor classes in the form of a 'present weather code', with an associated indicator of uncertainty. To provide immediate feedback to data users, the observations are plotted in near real time (NRT) and made publicly available on a website within 7 minutes (see linked documentation section). A 'present weather code' is a World Meteorological Organisation (WMO) code used to define the present observatory weather (see linked documentation for the WMO present weather code list). The instruments belonged to the Met Office but were loaned to the National Centre for Atmospheric Science (NCAS) for the duration of the project. NCAS handle the receiving server for real-time DiVeN data, which is the only route to this dataset. On-site collection of data are not guaranteed in all circumstances. Some of the sites rely on unreliable O2 3G dongles; whilst the Feshie instrument was solar and wind powered and the Coverhead instrument suffered from power / connectivity issues. Any missing data can be explained by these reasons, and are handled appropriately in the files. The data were collated into daily files of 1440 minutes. More information can be found in Pickering et al., 2018, see related documentation. Natural Environment Research Council (NERC) author 01793 411500 Polaris House North Star Avenue Swindon SN2 1EU United Kingdom unknown author Met Office author 0370 900 0100 Met Office FitzRoy Road Exeter EX1 3PB enquiries@metoffice.gov.uk author Pickering, Ben S Unavailable author Unavailable author Neely III, Ryan R. Unavailable author Unavailable author Harrison, Dawn Unavailable author Unavailable author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor Neely III, Ryan R. Unavailable principal_investigator Unavailable principalInvestigator Centre for Environmental Data Analysis (CEDA) point_of_contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Pickering, Ben S Unavailable point_of_contact Unavailable pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher notPlanned dataset disdrometer rainfall precipitation verification hydrometeors atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. grid English climatologyMeteorologyAtmosphere -10.75 2.25 48.75 59.25 2017-02-10T00:00:00 2019-09-30T22:59:59 Data are NetCDF formatted. Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/602f11d9a2034dae9d0a7356f9aeaf45 CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/badc/deposited2019/diven DOWNLOAD Download Data download https://doi.org/10.1175/1520-0426(2000)017<0130:AODFMS>2.0.CO;2 Löffler-Mang, M. and J. Joss, 2000: An Optical Disdrometer for Measuring Size and Velocity of Hydrometeors. J. Atmos. Oceanic Technol., 17, 130–139, https://doi.org/10.1175/1520-0426(2000)017<0130:AODFMS>2.0.CO;2 No further details. information https://doi.org/10.5194/amt-2018-302 Pickering, B. S., Neely III, R. R., & Harrison, D. (2018). The Disdrometer Verification Network (DiVeN): a UK network of laser precipitation instruments. Atmospheric Measurement Techniques Discussions, 2018, 1-34. No further details. information https://www.youtube.com/watch?v=SZLJq_mT288 YouTube video of disdrometer deployments around the UK No further details. information https://sci.ncas.ac.uk/diven/ Disdrometer Verification Network (DiVeN) Project site No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/surface/code.html World Meteorological Organisation (WMO) present weather code list No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/diven/DiVeN_Availability.pdf Plot of DiVeN data availability for each instrument deployment location No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/diven/DiVeN_Map.pdf Map of DiVeN instrument deployment locations No further details. information dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 The resource came into existence to fulfil a need for more reliable hydrometeor type data in the UK (compared with automated stations using a visiometer) in order to verify radar hydrometeor classification algorithms for the UK C-band dual-polarisation radar network, which was upgraded to dual-polarisation 2013-2018. The recorded disdrometer precipitation data are uploaded in real time to an NCAS server, where it has been converted to a netCDF format. The instrument itself does all the internal processing to generate the extra variables before outputting the data to a user, but the raw particle counts are retained. Raw diode voltages are not an available product.