National Center for Atmospheric Research

NIWOT02 ISFF Netcdf Files

The NIWOT02 5-minute Netcdf files contain means and higher moments from all sensors acquired by NCAR during NIWOT02. Each file contains one day's data from 00:00 to 23:59 GMT. The file names are of the form "niwot.YYMMDD.nc", where YYMMDD are the 2 digit year, month and day.

We recommend combining these to obtain more statistically-significant averages over longer time periods.

More information on the Netcdf file format is available from Unidata.

Status of Dataset

Aug 27, 2002

All data are as-sampled, no checking or editing have been done.
Sonic winds in sensor coordinates.
No CO2 sensors are operational.
3 meter and 6 meter sonics at station 1 were connected wrong. Sonic variables (u,v,w,tc).3m were actually from 6 meter sonic and vice versa. Fast water vapor (h2o.3m, h2o.6m) are correct. This applies to all moments.

Sep 3, 2002

CO2 Hydra system operational. 1 second data must be used to resolve separate hydra inputs.

Oct 1, 2002 (approximately)

Sonic winds rotated from sensor to geographic coordinates, using Vazimuths of (stn1=50 deg, stn2=75 deg and stn3=75 deg).

Oct 1, 2003

5 minute netcdf files recreated.
Switch of 3 meter and 6 meter at station 1 has been corrected: u.3m is actually from the 3 meter sonic.
Sonic winds rotated from sensor to geographic coordinates, using Vazimuths of (stn1=50 deg, stn2=75 deg and stn3=75 deg).

ISFF NIWOT02 5min Dataset Access

The NIWOT02 ISFF dataset is publically available. However, we ask users to provide their name and email address when they first download data, so that they may be notified of discovered errors or new releases of the dataset.

If you have provided this information before for this dataset, leave the fields blank.

This page was prepared by Gordon Maclean, NCAR Research Technology Facility

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