PETS (an acronym for Process Electron Tilt Series) is a computer program for processing of electron diffraction data, especially for data from a tilt series of diffraction patterns.
PETS needs no installation. It is sufficient to unpack the provided zip file to the folder of your choice. PETS 2.0 is currently available only as a 64-bit executable and requires OpenGL 3.2 or newer.
The key features of PETS are:
- Peak hunting and processing in reciprocal space
- Automatic or manual determination of lattice parameters
- Analysis of the rocking curves (the "camel plot")
- Integration of intensity data for kinematical and also dynamical refinement
- Calculation of 3D reconstruction of intensity distribution in reciprocal space (to be viewed e.g. by UCSF Chimera or Vesta)
- Calculation of arbitrary 2D sections of reciprocal space (aka "precession images")
To get started with PETS you may use the provided user manual (see below for download) and also the collection of tutorials for Jana2006 (called the Jana Cookbook, available at http://jana.fzu.cz/), including raw electron diffraction data. There is a section on electron diffraction in the cookbook, which includes tutorials on data processing with PETS.
PETS 1.0 is an older version of PETS without graphical interface and without some advanced features. YOu may use it if you cannot use PETS 2.0 for any reason. PETS 1.0 uses the program ImageJ (https://imagej.nih.gov/ij/) for displaying the output. ImageJ must be installed on your computer prior to running PETS. If ImageJ is installed in one of the standard locations, PETS will locate it automatically. Otherwise you need to define an appropriate system variable. Detailed instructions can be found after the first launch of PETS 1.0.
PETS 1.0 works in close connection with Jana2006 (http://jana.fzu.cz). Although not strictly required by PETS, it is convenient to have Jana2006 installed on your computer. Jana is used for indexing the reciprocal lattice extracted by PETS 1.0 and can be conveniently used to import the intensity data extracted by PETS and to make further steps in the structure analysis (sysmmetry determination, structure solution, structure refinement).
PETS is a freely distributed software for non-commercial use. See the license agreement for details. PETS 1.0 has only limited runtime error diagnostics and documentation. All use of the program is at your own risk.