1 / 13

BBC2 radar data 24-05-2003

Henk Klein Baltink Atmospheric Research Section. BBC2 radar data 24-05-2003. Outline. intercomparison 3 radars on 2003-05-24, BBC2 intercomparison 3 radars on 2001-08-03, BBC1 some issues 35 GHz cloudradar: power loss operational modes cloud mask. 24th May 2003. 3 RADARS: MIRACLE

fergusonm
Download Presentation

BBC2 radar data 24-05-2003

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Henk Klein Baltink Atmospheric Research Section BBC2 radar data 24-05-2003

  2. Outline • intercomparison 3 radars on 2003-05-24, BBC2 • intercomparison 3 radars on 2001-08-03, BBC1 • some issues 35 GHz cloudradar: • power loss • operational modes • cloud mask CloudNET Workshop Toulouse

  3. 24th May 2003 3 RADARS: MIRACLE (30 m range gate, 5 sec. average profile, ~20 dB offset) TARA (30 m range gate, 5 sec average profile) KNMI RADAR (90 m range gate, 15 sec combined profile) period: 7:40 - 9:50 UTC CloudNET Workshop Toulouse

  4. loss of signal due to raindrops on antenna(?) artefact of mode merging melting layer precip insects rain at surface ice clouds (mixed?) 35 GHz Cloudradar data water clouds CloudNET Workshop Toulouse

  5. 24th May 2003 7:40 – 9:50 UTC 35 GHz MIRACLE TARA CT75 CloudNET Workshop Toulouse

  6. Profiles @ 7:50 and 8:15 • reflectivity • velocity • spectral width CloudNET Workshop Toulouse

  7. Reflectivity VerticalVelocity Ice cloud2001-8-3 BBC1 CloudNET Workshop Toulouse

  8. research issues: • calibration of radars (BBC2/COST720) • velocity offset 35 GHz? • differences in coded / uncoded mode (dBZ, width)? CloudNET Workshop Toulouse

  9. 35 GHz radar issues • power loss • operational modes • cloud mask CloudNET Workshop Toulouse

  10. power loss CloudNET Workshop Toulouse

  11. After BBC1 BBC1 10000 5000 0 20 s 16 s modes 35 GHz (acquisition cycle) acquisition processing Height uncoded coded coded X-pol CloudNET Workshop Toulouse

  12. cloud mask • based on Clothiaux et al. 1995 (5x5 pixels) • too many small clouds are masked CloudNET Workshop Toulouse

  13. to do next months: • analyse BBC1 and BBC2 data • (analysis other datasets with multiple radar?) • improve: • mode merging • cloud mask • insect removal CloudNET Workshop Toulouse

More Related