Attributes { iso_dataset { String title "IDRA processed data"; String abstract "This dataset contains X-band (central frequency of 9.475 GHz) weather radar measurements from the TU Delft IRCTR drizzle radar IDRA. It includes plan-position indicators (PPI) of all polarimetric weather radar observables. IDRA is mounted at the top of the Cabauw tower at 213 m agl. It is scanning horizontally at a fixed low elevation angle, rotating with one round per minute, and covering, depending on the setting, a slant range of 1.5 km, 15 km or 60 km with a range resolution of 3 m or 30 m. IDRA thus provides the horizontally spatial distribution of precipitation over the CESAR observatory."; String status "onGoing"; String hierarchyLevel "dataset"; String url "http://data.3tu.nl/repository/collection:cabauw"; String protocol "website"; String uid_dataset "5f3bcaa2-a456-4a66-a67b-1eec928cae6d"; String topic "climatologyMeteorologyAtmosphere"; String keyword "Radar, Reflectivity, Differential Reflectivity, Linear Depolarisation Ratio, Doppler Velocity, Doppler Spectrum Width, Differential Phase, Precipitation"; String westbound_longitude "4.707"; String eastbound_longitude "5.145"; String southbound_latitude "51.835"; String northbound_latitude "52.105"; String temporal_extent "2008-06-26,onGoing"; String date "2009-10-19"; String dateType "publication"; String statement "Processed weather radar measurements at linear horizontal / vertical polarisation basis of IDRA. The observables included are reflectivity, differential reflectivity, linear depolarisation ratio, Doppler velocity, Doppler spectrum width, and differential phase. The forward-scattering and backward-scattering effects are not separated, i.e. the data are not corrected for attenuation."; String code "28992"; String codeSpace "EPSG"; String accessConstraints "CESAR data policy (www.cesar-database.nl)"; String useLimitation "scientific"; String organisationName_dataset "Delft University of Technology (DUT)"; String email_dataset "t.otto@tudelft.nl"; String role_dataset "Principle Investigator"; String organisationName_metadata "Delft University of Technology (DUT)"; String role_metadata "Principle Investigator"; String email_metadata "t.otto@tudelft.nl"; String url_metadata "http://rse.ewi.tudelft.nl/"; String datestamp "2010-05-27"; String metadataDateType "creation"; String language "eng"; String metadataStandardName "ISO-19115"; String metadataStandardNameVersion "Nederlands profiel op ISO 19115 voor geografie, v1.2"; DODS { Int32 strlen 1; String dimName "scalar"; } } product { String date_start_of_data "2009-11-20T00:00:03Z"; String date_end_of_data "2009-11-20T23:59:00Z"; String ref_doc "IDRA_dataset_description_document.pdf"; String ref_doc_version "1.0"; String format_version "netCDF,3.6.2"; String originator "Otto T., DUT"; String revision_date "2010-05-27"; DODS { Int32 strlen 1; String dimName "scalar"; } } station_details { String name "CESAR observatory"; String latitude "51.97"; String longitude "4.926"; String elevation "-0.7"; String WMO_id "06348"; String address "Zijdeweg 1"; String postal_code "3411 MH"; String city "Lopik"; String administration_area "Utrecht"; String country "the Netherlands"; DODS { Int32 strlen 1; String dimName "scalar"; } } time { String standard_name "time"; String units "hours since 2009-11-20 00:00:00"; String axis "T"; } range { String long_name "range"; String scan_type "non-fixed"; String units "m"; String comment "Slant range (meter) to the leading edge of the range bins. The radial extension of the range bins is provided by the variable ."; } equivalent_reflectivity_factor { String long_name "co-polarised equivalent reflectivity factor at horizontal polarisation"; String units "dBZ"; String comment "Co-polarised equivalent reflectivity factor at horizontal polarisation in logarithmic units (dBZ, normalised to 1 mm6 m-3)."; Float32 _FillValue -999.0; } differential_reflectivity { String long_name "differential reflectivity"; String units "dB"; String comment "Logarithmic ratio of the co-polarised equivalent reflectivity factor at horizontal polarisation and the co-polarised equivalent reflectivity factor at vertical polarisation."; Float32 _FillValue -999.0; } linear_depolarisation_ratio { String long_name "linear depolarisation ratio"; String units "dB"; String comment "Logarithmic ratio of the cross-polarised and the co-polarised channel for transmitted horizontal polarisation."; Float32 _FillValue -999.0; } radial_velocity { String long_name "radial Doppler velocitiy for transmitted horizontal polarisation"; String units "ms-1"; String comment "Radial Doppler velocity estimated from the Doppler phase shift on a sweep to sweep basis."; Float32 _FillValue -999.0; } spectrum_width { String long_name "spectrum width"; String units "ms-1"; String comment "Spectrum width for horizontal polarisation transmitted."; Float32 _FillValue -999.0; } differential_phase { String long_name "Differential phase between the co-polarised echoes at horizontal and vertical polarisation."; String units "rad"; String comment "Spectral estimation of the differential phase between the co-polarised echoes at horizontal and vertical polarisation."; Float32 _FillValue -999.0; } azimuth { String long_name "azimuth"; String units "rad"; String comment "The azimuth (radian) is measured clockwise from the Geographic North Pole."; Float32 _FillValue -999.0; } quicklook { String long_name "quicklook"; String comment "Classification of the data in one minute intervals: 1 - no rain, 2 - weak rain, 3 - moderate rain, 4 - strong rain"; } range_resolution { String long_name "range resolution"; String units "m"; String comment "Radial extension (meter) of one range bin."; } radiation_wavelength { String long_name "central radiation wavelength"; String units "m"; String comment "Central radiation wavelength (meter)."; } frequency_excursion { String long_name "frequency excursion"; String units "s-1"; String comment "Frequency excursion of the transmitted linear up-chirp."; } sweep_time { String long_name "sweep time"; String units "us"; String comment "Sweep time (microseconds) of the transmitted linear up-chirp."; } tx_power { String long_name "transmitted power"; String units "W"; } sample_size { String long_name "sample size"; String comment "Number of sweeps that are averaged for the calculation of one profile."; } beam_width { String long_name "antenna beam-width"; String units "rad"; String comment "Half-power beam-width of the transmit and receive antennas (radian). The beam-width determines the resolution in azimuth and elevation."; } elevation_angle { String long_name "elevation"; String units "rad"; String comment "The elevation (radian) is measured from the horizon (0 rad) upwards."; } NC_GLOBAL { String title "IDRA Processed Data"; String institution "Delft University of Technology (DUT)"; String history "Polarimetric weather radar observables without a separation of the forward-scattering and backward-scattering effects."; String references "J. Figueras i Ventura, Design of a High Resolution X-band Doppler Polarimetric Radar, PhD Thesis, TU Delft, 2009. @ http://repository.tudelft.nl/view/ir/uuid%3Ad90b9ad6-237b-435d-9dc5-5660d9e7fbdd/"; String Conventions "CF-1.4"; String location "CESAR observatory, the Netherlands"; String source "Ground-based polarimetric weather radar."; String example "http://ftp.tudelft.nl/TUDelft/irctr-rse/idra/"; } DODS_EXTRA { String Unlimited_Dimension "time"; } }