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  Instrumentation : Data Transfer
 


LAKE DATA

DATA TRANSMISSION AND INITIAL QA SCREENING

The program that imports the RUSS data currently is scheduled to run every day at 7:30 AM. The RUSS base station software is used to call each RUSS and download data that has been collected since the last call. A file containing real-time data (RTD) collected during the duration of the call is also created. These new profile data and RTD files are stored on the base station computer as plain ASCII text files, one file for each day's data. The data files from each site are stored in a separate directory on the computer. Table 1 (above) is an sample of an original profile data file created by the RUSS base station.

The Conversion Process

A program (the importer) is now launched. It reads data files that have been created or changed since the last time it was run, and converts the data to the format used by the report generating and data visualization programs. Additionally, the original data files are copied to the web server so they are accessible for immediate QA/QC. Profile data files are copied to http://wow.nrri.umn.edu/data/ and RTD files are copied to http://wow.nrri.umn.edu/rtd/.

STREAM AND RIVER DATA

DATA TRANSMISSION AND INITIAL QA SCREENING

Each SMU is called daily and data that has been collected since the last call is downloaded. These new data files are stored on the base station computer as comma-delimited ASCII text files. The Kingsbury station is polled twice daily, at 6 AM and 2 PM. The Chester and Tischer sites are scheduled to be polled at 6AM each day because of cell phone costs.

The Conversion Process

A program (the data importer) is now launched. It reads any data files that have been created or changed since the last time it was run, and converts the data to the format used by the report generating and data visualization programs. The data importer examines the beginning of these files and checks to make sure that the contents (e.g. site name, parameter names and units) correspond to what is expected. If not, an error message is generated and no further action is taken with this file. This will catch errors that could occur if, for example, a new parameter is being read by the SMU, but the property files used by the data importer for that site haven't been updated to handle the change.


 

 

 


  


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date last updated: Wednesday March 03 2004