We are presenting new achievements in single photon counting altimeter simulator. The existing planetary altimeter
simulator proposed for operational range 400 to 1400 km with one meter range has been extended by multiple target
situation - simple clouds model and by some basic interaction with terrain profile map. The new design cooperating
with map system and results of the photon counting laser altimeter simulator are presented. The simulator is designed to
be a theoretical and numerical complement for a Laser Altimeter Technology Demonstrator of the space borne laser
altimeter for planetary studies built on our university. The simulator is useful complement for any photon counting
altimeter both for altimeter design and for measured data analysis.