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The subject of the graduate qualification work is “Modeling of inter- satellite free-space laser communication link”.To overcome the spectrum scarcity and bandwidth bottlenecks inherent in traditional microwave links, Inter-satellite Laser Communication (ISLC) has become pivotal for next-generation space networks. This study presents a rigorous analysis of ISLC link dynamics, specifically isolating the impact of the Acquisition, Tracking, and Pointing (ATP) subsystem on overall performance. Utilizing the GLAD simulation environment for high-fidelity physical optics propagation, we modeled the degradation of signal integrity—quantified via received power and spot fidelity—under conditions of satellite pointing jitter. Our results underscore that mitigating these mechanical perturbations through precision ATP control is essential for maintaining link availability. These findings offer critical design parameters for optimizing the reliability of future space-based optical backbones.We turn investigator’s attention to large GLAD software power in field of inter-satellite laser communication link modeling.