-------- Original Message -------- Subject: October 16 Report Date: Wed, 17 Oct 2001 13:49:19 -0400 From: "taneil uttal" <taneil.uttal.atsea@rbnems.ronbrown.omao.noaa.gov> To: paquita.zuidema@noaa.gov October 16th Report SHIP STATUS - We are parked at the WHOI Buoy and will be staying here for several days. This means that rather than moving along at 10 or 12 knots under the clouds (as well as having the clouds move over us), the clouds are just moving over us. INSTRUMENT STATUS - Everything is up and running. Duane did some changes with the post blanking time, but it didn't make any difference, so he is changing things back to the original settings. He is running calibrations before and after. PROCESSING STATUS - I have been plotting ceilometer data on top of radar data....looks excellent for these kinds of clouds. By "excellent" I mean that the ceilometer will be very useful for having us separate out drizzle and virga regions of the cloud from the cloud areas. This should be helpful with understanding the effect of the tests that Sergey wants to do on reflectivity thresholds and LWP retrievals. I have not yet coded the retrievals, but will work on that this afternoon. I will try to get Bob Weller to send out a radar/ceilometer plot in the next weekly report. We are working on comparisons with Sandra Yuter on the C-band data as she is getting significantly higher cloud tops than we are and is worrying about pointing angles and interpolation resolutions. I think that these clouds are probably marginal for that radar given the beamwidth, pulse length and sensitivity. MJ, do you want to ask some of the ocean sensing radar theoroticians and see if they have opinions about sea clutter for a radar of that wavelength at low grazing angles? DINNER REPORT Glazed duck, spinich crepes. FORWARD TO: Post Matrosov Shupe Ryan Otto Fairall Moran