Table of Contents - The Atmospheric Studies Group at TRC

Section 10: POSTPROCESSORS
10.6.4 Timeseries File(s)
CALPOST can generate a set of optional timeseries files for the concentration, deposition flux, or
extinction coefficient identified in the CALPOST control file, at each receptor selected, for each
averaging time selected. Each averaging time is placed in a separate file, so there may be as many as five
timeseries files generated (1-period, 1-hour, 3-hour, 24-hour and N-user averages). The period covered
by the timeseries is controlled by the selected day option as well as the period processed. No timeseries
output is generated if no days are selected. All averages in the period processed are written to the
timeseries file(s) if all days are selected.
For a given time (e.g, the 3-hour period beginning at 0900 on Julian day 310), the current averages for all
selected receptors are written as a single "record". The length of the record grows as the number of
receptors increases. Therefore, the timeseries option should be used with a manageable subset of the
receptors contained in the CALPUFF simulation.
The format of the timeseries file is described in Table 10-25. The file contains a number of header
records that identify the parameter that is reported, its units and averaging time, and the number of
receptors included. The location of each receptor is provided. Data records follow, with a single record
for each time period. An example timeseries file for 30-minute averages of SO 2 at one gridded receptor
for a single 4-hour period is shown in Table 10-26.
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