OASIS ADCP Data Regridding Example

The hourly data sets have the data averaged in time to one hour intervals and interpolated to 5 meter bins. Below are the Ferret commands to load the orignal ADCP data set and the gridded data set and the plotting commands to create the graphics. The black lines are the original data and red lines are the gridded data.

use "http://dods.shore.mbari.org/cgi-bin/nph-nc/data/OASISdata/netcdf/hourlyM4.nc"
use "http://dods.shore.mbari.org/cgi-bin/nph-nc/data/OASISdata/deployments/m4/199908/m4/netcdf/m4_adcp_19990824_workhorse.nc"

plot/z=19.593 U_COMPONENT_UNCORRECTED
plot/z=19.593/ov U_UNCORRECTED_HR[d=1]
frame/file=timeAvg1.gif


plot/z=19.593/t=12-feb-2000:14-feb-2000 U_COMPONENT_UNCORRECTED
plot/z=19.593/t=12-feb-2000:14-feb-2000/ov U_UNCORRECTED_HR[d=1]
frame/file=timeAvg2.gif


go graticule
plot/t="12-feb-2000 10:00"/z=0:100 U_COMPONENT_UNCORRECTED
plot/t="12-feb-2000 10:00"/z=0:100/ov U_UNCORRECTED_HR[d=1]
frame/file=depthInt1.gif

The effect of the hourly averaging is not evident for the ADCP data as the original data have a time interval of one hour. Let's load the original metsys data for this deployment and examine the averaging of air temperature and wind speed for the same 2 day period.

use "http://dods.shore.mbari.org/cgi-bin/nph-nc/data/OASISdata/deployments/m4/199908/m4/netcdf/m4_metsys_19990824.nc"
plot/t=12-feb-2000:14-feb-2000 AIR_TEMPERATURE
plot/t=12-feb-2000:14-feb-2000/ov AIR_TEMPERATURE_HR[d=1
frame/file=timeAvg3.gif

plot/t=12-feb-2000:14-feb-2000 WIND_SPEED
plot/t=12-feb-2000:14-feb-2000/ov WIND_SPEED_HR[d=1]
frame/file=timeAvg4.gif