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PADS 3.5 offers significant improvements over earlier versions of the program. It is Windows 7 compatible and also works with Windows XP and Vista.
Major Improvements:
Raw data are preserved in a separate file and can be reprocessed, allowing for post-sampling calibrations and corrections to variables like airspeed that affect particle concentrations All probe housekeeping channels can be renamed and reprocessed Users have greater control over sources for variables such as temperature, pressure, and air speed, which results in more accurate sample volume and particle concentration calculations for individual probes Time variables are presented in a more accessible format (e.g., HH:MM:SS format in addition to seconds since midnight) Additional options are available for acquisition rates and automatic file restarting Numerous bugs and minor issues in the previous version of PADS have been resolved
Detailed List of Changes:
Enhanced data output:
Raw data are now saved. These data are stored in a separate file from the processed data.
Raw data can be reprocessed with new global variable assignments and new calibration coefficients.
Global variables currently used are logged and clarified.
Channel names are standardized between instruments.
Improvements to how time is handled and documented:
PADS can automatically start a new file at designated intervals (e.g., every hour, every four hours, every day at midnight, etc.)
PADS offers an option to write time in a user-friendly format
New data acquisition rates are available (20Hz, 25Hz, 20 Sec)
Improved graphing and data-display features on individual instrument tabs New configuration options:
All probe A/D housekeeping channels can be renamed and reprocessed
Internal formatting of configuration files is completely new; configuration files now consolidate information formerly stored in separate threshold tables
More powerful PADS Summary tab:
It can write its own file of channels from any instruments
Any channels from any instrument can be sent out over a serial or ARINC port
An XY graph shows Z channel coded by color (correlation plot)
The new display includes a summary histogram that combines histogram data from more than one probe
A table display shows all data from all instruments
Improved error reporting Improved file-loading—greater tolerance of file directory structures with non-standard names More flexible commenting—user can add time-stamped comments to a log file More comprehensive file headers that include the following:
PADS key serial number, used as a system identifier
PADS version numbers (for overall program and instrument modules)
Offset from UTC time, used to identify time zone
PADS 2 users updating to PADS 3 who have not sent their instruments in for calibration may need to update their calibration coefficients. See the DMT technical note "Updating Calibration Coefficients in PADS 3.X."
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