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Particle Analysis and Display System (PADS)
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Overview
The Particle Analysis and Display System (PADS) is LabVIEW-based software that works with many DMT instruments and
other leading instruments in the atmospheric sciences. It features an easy-to-use interface, with one tab for each instrument in the system. Optional PADS tabs also display data simultaneously from different instruments, combine
data from several instruments into overall measurements, and allow the user to send data to other computer systems.
PADS 2.X users, read about the new features of PADS 3.
Advantages
Tab structure for rapid view of multiple instruments Automated calculation of parameters of interest such as effective diameter (ED), Median Volume Diameter
(MVD), and Number Concentration Preservation of both raw and processed data Ability to start new files automatically at timed intervals Sampling speeds of 0.05 to 25 Hz Real-time view of two-dimensional image data for imaging-instrument modules Intuitive particle-size histograms and time-series charts Easy configuration of instruments and of PADS displays Selectable sources for airspeed, temperature and pressure measurements, to ensure most accurate particle
concentrations for individual probes Unlimited distribution of playback program Compatible with Windows 2000, Windows XP, and Windows 7
Particle Images Gathered with the PADS Cloud Imaging Probe (CIP) and Cloud Imaging Probe Grayscale (CIP-GS) modules.
CIP-GS data courtesy of Forschungszentrum Juelich.
Data Recording
PADS records both raw and processed data files. Because raw data are preserved, data can easily be reprocessed, allowing for post-sampling calibrations and corrections to variables like airspeed that affect particle concentrations. Probe housekeeping channels can be both reprocessed and renamed.
Data are recorded at user-selectable sampling speeds of 0.05 to 25 Hz. Files are recorded in comma-delimited format (.csv). They can easily be viewed in any spreadsheet program such as Excel. In addition, data can be imported into database or graphing programs for additional analysis. PADS file names are date- and instrument-stamped for easy identification.
Supported Instruments and Modules
Air Data Probe (ADP) and AIMMS-20 Aerosol Particle Spectrometer with Depolarization (APSD) Anemometer with NI A2D Converter ARINC 429 Back-Scatter Cloud Probe (BCP) Cloud and Aerosol Spectrometer (CAS) Cloud and Aerosol Spectrometer with Depolarization (CAS-DPOL) Cloud Condensation Nuclei Counter with Single (CCN-100) or Dual (CCN-200) Columns Cloud Droplet Probe (CDP) and CDP with with Particle-by-Particle (CDP-PBP) Cloud Imaging Probe (CIP) and CIP Grayscale (CIP-GS) Dewpoint Ethernet UDP Output Fog Monitor (FM-100) Forward-Scattering Spectrometer Probe (FSSP) with SPP-100 or SPP-300 electronics Garmin GPS General Input (a module that accepts data from a wide variety of other instruments) Hot-wire Liquid Water Content Sensor (LWC-100) National Instruments’ NI A/D Converter (NI A2D) Meteorological Particle Spectrometer (MPS) Passive Cavity Aerosol Spectrometer Probe, airborne version (PCASP-100X) and ground-based version (PCASP-X2)
Precipitation Imaging Probe (PIP) Serial Output Sonic Anemometer Summary
Tools
PADS 2.X 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."
Click here for information on reformatting the date and time in PADS 2.X.
AutoIt is a scripting language that automates Windows processes, and it can be used with PADS 2.X to automatically start new output files at given intervals (e.g., every noon). DMT does not support AutoIt, but more information is available at www.autoitscript.com. (If you have trouble opening this link, right-click and select one of the options to open the link.) PADS 3 allows users to start new files automatically.
Pricing
Contact DMT for pricing, more information, or to inqure about custom software development for modules not listed above: +1.303.440.5576,
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