GIPSI

GIPSI - GIADA Instruments Performance SImulatorGIPSIArchitecture

GIPSI is a Java tool developed by the GIADA team able to simulate the coma dust impact on ROSETTA instruments and to predict behaviour and performances of instruments when placed in an operative scenario in term of scientific and technical response. 

The tool has three main modules :

GIPSI for dust and optical instruments are simulators able to forecasts the dust environment effects on instruments and predict the performances that instruments can reach. Performances are evaluated in term of number of dust particles detected by each sensor (for dust instruments), or in term of coma radiance detected (for optical instruments) when the spacecraft is placed in a specific dust comet environment along a specific orbit and for a defined time interval.

Inputs for simulators are pretty the same : 

  • dust grains number density, dust size distribution and velocity ( i.e. 3D+t dust model outputs). These data are reported over a spatial spherical grid that describes the coma around the nucleus, at di erent time instants, in order to describe the coma evolution;
  • S/C orbit and attitude;
  • Instrument definition (field of View, sensitive surface area , sensitivities limit and uplimit etc.) .

Outputs are naturally different (depends strictly from sensors that user chooses to simulate) but they are expressed in a standard format (Netcdf .nc,.cdl ). So even GIPSI for dust insturments output and GIPSI for optical instrument output can be viewed using the GIPSI graphic module. 

One of the main feature of GIPSI simulators is that we can simulate performances of instruments assuming different coma dust environment. The way in which the 3D+t dust model is developed and the physic used to simulate grain interaction and ejection from dusty object (isotropic, anisotropic, etc) is not determinant for simulation.  This is possibile because GIPSI requires that information about coma dust are provided in standard format (.nc), so different dust models outputs could be used with the tool if provided according to format (you can find details about the model's output format in the corresponding document file in Documentation and Tutorials secition below).

You can find more details about GIPSI in the following Documentation and Tutorials section.

Documentation and Tutorials