Attributes { iso_dataset { String title "IDRA Raw Data"; String abstract "This file contains the raw data streams of the FW-CW X-band (central frequency 9.475 GHz) polarimetric weather radar IDRA located on the top of the 213m agl. meteorological observation tower at Cabauw, The Netherlands. The datastreams comprises the complex I/Q signals of the beat signal for the two co-polarised (linear horizontal and linear vertical polarisation) and one cross-polarised receiver channel. The file contains as well the corresponding processed weather radar observables."; 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, 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 "This file contains the raw data streams (complex I/Q signals of the beat signal) of IDRA."; 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 "2009-08-19T12:00:00Z"; String date_end_of_data "2009-08-19T12:00:59Z"; 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_raw_data { String standard_name "time"; String units "hours since 2009-08-19 00:00:00"; String axis "T"; } sample_beat_signal { String standard_name "sample"; String units "Samples of the beat signal collected at a sampling frequency of 2.5 MHz"; String axis "S"; } time_processed_data { String standard_name "time"; String units "hours since 2009-08-19 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 ."; } i_hh { String long_name "beat signal, I_hh"; String units "counts"; String comment "Real part of the beat signal at co-polarised horizontal polarisation in analog-to-digital converter counts."; } q_hh { String long_name "beat signal, Q_hh"; String units "counts"; String comment "Imaginary part of the beat signal at co-polarised horizontal polarisation in analog-to-digital converter counts."; } i_vv { String long_name "beat signal, I_vv"; String units "counts"; String comment "Real part of the beat signal at co-polarised vertical polarisation in analog-to-digital converter counts."; } q_vv { String long_name "beat signal, Q_vv"; String units "counts"; String comment "Imaginary part of the beat signal at co-polarised vertical polarisation in analog-to-digital converter counts."; } i_vh { String long_name "beat signal, I_vh"; String units "counts"; String comment "Real part of the beat signal at cross-polarisation in analog-to-digital converter counts."; } q_vh { String long_name "beat signal, Q_vh"; String units "counts"; String comment "Imaginary part of the beat signal at cross-polarisation in analog-to-digital converter counts."; } noise_power_horizontal { String long_name "noise power, horizontal polarised receiver channel"; String units "W"; String comment "Noise power (Watt) in the horizontal polarised receiver channel measured with the transmitter switched off. Measured at 2009-08-19T11:35:37Z."; } noise_power_vertical { String long_name "noise power, vertical polarised receiver channel"; String units "W"; String comment "Noise power (Watt) in the vertical polarised receiver channel measured with the transmitter switched off. Measured at 2009-08-19T11:35:37Z."; } 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)."; Float64 _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."; Float64 _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."; Float64 _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."; Float64 _FillValue -999.0; } spectrum_width { String long_name "spectrum width"; String units "ms-1"; String comment "Spectrum width for horizontal polarisation transmitted."; Float64 _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."; Float64 _FillValue -999.0; } azimuth_raw_data { String long_name "azimuth, raw data"; String units "rad"; String comment "The azimuth for the raw data (radian) is measured clockwise from the Geographic North Pole."; } azimuth_processed_data { String long_name "azimuth, processed data"; String units "rad"; String comment "The azimuth for the processed data (radian) is measured clockwise from the Geographic North Pole."; } 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 of the processed data and of the noise measurements."; } 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 Raw Data"; String institution "Delft University of Technology (DUT)"; String history "Raw IDRA data, complex I/Q signals"; 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/"; } }