National Center for Atmospheric Research

NIWOT02 ISFF ASCII Data Access

The NIWOT02 5-minute dataset contains means and higher moments from all sensors acquired by NCAR during NIWOT02.

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

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).

Java Applet and Plugin

Downloading ASCII data (.txt) uses a Java applet for selecting variables and time periods. Your browser must have support for (at least) Java version 1.2 to run the applet. If your browser does not have support for Java 1.2, you should be redirected to a web site where you can download a plug-in for Netscape, Mozilla or Internet Explorer. The plug-in is available for Linux, Solaris and Windows.

Version 1.2 of Mozilla will not redirect you to the plug-in download page if the plug-in is needed. You must click on the java.sun.com link, below to get the plugin.

Java Plug-in Information

Netscape/Mozilla users can enter a URL of about:plugins, or click on Help->About Plug-ins to display the plug-ins which have been installed.

The current Java run-time environment (JRE) which includes the Java plugin for Windows (IE/Netscape/Mozilla), Linux (Netscape/Mozilla) and Solaris (Netscape/Mozilla) is available at http://java.sun.com/j2se/1.4.2/download.html.

If that link is broken, try http://java.sun.com/j2se.

Download the JRE (Java Runtime Enviromment) from the latest version of the J2SE. You don't need the extra stuff, like NetBeans.

Installation instructions are available at http://java.sun.com/j2se/1.4.2/jre/install.html.

Some Notes about the Java plugin on Various Platforms

Java Applet User Interface

The data selection applet provides four areas for user input.

A "Times" section for selecting the start and end times of your request, in Mountain Standard Time MST (7 hours earlier than GMT, 6 hours during daylight time).

A "Variables" section for selecting the variables of interest. The variables are grouped under folder tabs by station name, height, and (loosely) by variable type.

An "Output Format" section for choosing the format of the ASCII output

A Download button. The browser will popup a file selection menu where you can enter the desired file name.

Sample of top part of applet. Click to enlarge.

Sample of bottom part of applet. Click to enlarge.

Download Problems

If you experience problems downloading data click here.

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.

Contact Gordon Maclean if the Java applet does not work after installing the plugin, or if you have any other feedback about the download process.

Please contact your system administrator if you have problems installing the Java plugin in your browser.

User Name:
Organization:
Email address: