Which of the following is not analyzed to determine the adversary system for potential COG?

To determine the center of gravity (COG) in an adversary system, factors such as leadership, infrastructure, and fielded forces are essential components of analysis. Leadership can reveal decision-making capabilities and the capacity to galvanize support, which are critical to understanding how the adversary operates. Infrastructure encompasses the logistical, communication, and operational foundations that enable the adversary to function effectively. Fielded forces are crucial because they represent the actual military capabilities that can be brought to bear in an engagement.

In contrast, weather patterns are not typically analyzed to determine the adversary's COG because they do not directly relate to the structural or operational components of the adversary itself. While weather can influence military operations broadly, it does not provide insight into the strategic or systemic strengths or weaknesses of an enemy that would be crucial in identifying their COG. Thus, it is the least relevant factor when assessing the adversary system for potential COG.