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We have developed a fully kinetic electromagnetic modelto study instabilities and waves in planetary plasma environments.In the particle-in-a-cell (PIC) model both ions and electrons aremodeled as particles. An important feature of the developed globalkinetic model,  called  HYB-em, compared to other electromagneticcodes is that it is  built up on an earlier quasi-neutral hybridsimulation platform called HYB and that it can be used inconjunction with earlier hybrid models. The HYB models have beenused during the past ten years to study globally the flowingplasma interaction with various Solar System objects: Mercury,Venus, the Moon, Mars, Saturnian moon Titan and asteroids. The newstand-alone fully kinetic model enables us to (1) study thestability of various planetary plasma regions in three-dimensionalspace, (2) analyze the propagation of waves in a plasmaenvironment derived from the other global HYB models. All particleprocesses in a multi-ion plasma which are implemented on the HYBplatform (e.g. ion-neutral-collisions, chemical processes,particle loss and production processes) are also automaticallyincluded in HYB-em model.  In this brief report we study the developed approach by analyzingthe propagation of high frequency electromagnetic waves innon-magnetized plasma in two cases: We study (1) expansion of aspherical wave generated from a point source and (2) propagationof a plane wave in plasma. The analysis shows that the HYB-emmodel is capable of describing these space plasma situationssuccessfully. The analysis also suggests the potential of thedeveloped model to study both high density-high magnetic fieldplasma environments, such as Mercury, and low density-low magneticfield plasma environments, such as Venus and Mars

On the modeling of planetary plasma environments by a fully kinetic electromagnetic global model HYB-em