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December 16, 2015

GRASP 10.5 release

This release adds several new features to GRASP, along with a few bug fixes. A complete list of the features and bug fixes is sent to the users directly, and some are highlighted below:

  • A new tabulated rim type without restrictions: the rim-points of a reflector can now be given in sequential order without paying attention to the earlier requirement, that all points had to be visible from an interior point. Concave and convex rim-segments are supported. This feature was also recently introduced into our shaping program POS, and is extremely useful in the design and analysis of reflector antennas for spacecraft applications.
  • Import and export of data to tables in the GUI: this feature enables cut and paste editing of many objects and provides a convenient way of sharing data between GRASP and  other programs, e.g. Excel.
  • Out-of-core solver (MoM users only): The accelerated MoM implementation (MLFMM) can now utilize the hard disk instead of RAM for some of the data in an MLFMM solution. This enables much larger cases to be solved on even fairly modest laptop computers. While the computation time is higher, the increased runtime is preferable over having insufficient memory to solve the case.
  • New solver for multiple right hand sides (MoM users only): GRASP now employs a more efficient iterative solver that solves for all excitations simultaneously. This is important for MLFMM simulations with multiple excitations, e.g. when using arrays or waveguides as sources. The new iterative solver leads to reduced computation time and often a more accurate solution.

Full-wave solution of a reflector configuration with multiple feeds.

The new features moreover ensure compatibility with the latest POS 6.1 release,