1 / 10

MAGIC Cloud Radars

MAGIC Cloud Radars. Karen Johnson kjohnson@bnl.gov First MAGIC Science Workshop 5 /2014. Ship Layout. Location of ARM Instrumentation. About the radars. Beam-steerable wind profiler. KAZR Ka-band ARM Zenith Radar 35 GHz, 8.6 mm NOT stabilized. Both Radars…. vertically-pointing

wyanet
Download Presentation

MAGIC Cloud Radars

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. MAGIC Cloud Radars Karen Johnson kjohnson@bnl.gov First MAGIC Science Workshop5/2014

  2. Ship Layout Location of ARM Instrumentation

  3. About the radars Beam-steerable wind profiler KAZR Ka-band ARM Zenith Radar 35 GHz, 8.6 mm NOTstabilized Both Radars… • vertically-pointing • stored Radar Moments: • Reflectivity • Mean Doppler velocity • Spectrum width • stored Spectra • had high data rates MWACR Marine W-band ARM Cloud Radar 95 GHz, 3.2 mm Stabilized platform

  4. What do cloud radars provide? . . . Cloud Properties! • Moments + Signal-to-noise ratio  • Cloud layer bases, tops • Cloud fraction • Reflectivity of clouds • Hydrometeor vertical motions • Ka- and W-band spectra, together  • Drop size distribution • Vertical air velocity • Effective Radius

  5. Radar Data Timeline Ship Leg Radar Good Sensitivity over all ranges Better Sensitivity; Hts > 0.7km Best Sensitivity; hts > 2km Better Sensitivity but more attenuation 2013.08.03 2013.06.08 2013.07.07 2012.10.20 2013.08.31 2013.09.28 2012.11.17 2012.09.22 2012.12.15 2013.05.11

  6. Reflectivity, Date vs. Height Leg 07 18 0 KAZR GE Reflectivity 18 0 KAZR HI Reflectivity Range (km) LA Hl LA 16 0 MWACR Reflectivity Date

  7. Lowest few kilometers Leg 15 4 0 KAZR GE Reflectivity Lowest 4 km Range (km) LA Hl LA 4 0 MWACR Reflectivity Lowest 4 km Range (km) Date

  8. KAZR General vs. Higher Sensitivity Modes 4 0 Leg 15 KAZR GE Reflectivity Lowest 4 km Range (km) LA Hl LA 4 0 KAZR MD Reflectivity Lowest 4 km Range (km) Date

  9. Availability of Radar Data All data ingested (netCDF) and available at the ARM Archive. magkazrgeM1.a1 magkazrmdM1.a1 or magkazrhiM1.a1 magmwacrM1.a1 Spectra data also has been ingested; most is at the Archive now. Leg-by-leg Images are here: http://www.gim.bnl.gov/armclouds/MAGIC/MAGIC_image_table.htm

  10. Status of Radar Data • Corrections to be done: • Calibration of Reflectivity: • Just received KAZR ‘internal’ calibration values • Will omit spurious lowest range gates • esp. KAZR MD: don’t use data below ~700m • Will be reprocessing to apply them very soon • Ship Motion Compensation (SHIPCOR VAP) • VAPs to be run: (after corrections done) • KAZR-ARSCL, WACR-ARSCL • MicroARSCL (spectra) • ?? • Questions? See something odd? kjohnson@bnl.gov

More Related