针对双抛三轴天线低轨终端在应用中存在跟踪效果差和算法复杂的问题。通过对天线高仰角跟踪特性分析，提出一种小尺寸三轴天线跟踪策略。建立了天线跟踪指向角数学模型，推导了不同坐标系下天线指向角公式以及波束空间指向公式。利用一组低轨卫星数据进行验证，结果表明在卫星过境期间天线跟踪误差始终小于1/10波束宽度，满足低轨终端使用需求。对天线跟踪指向角推导过程具备普遍性，可扩展到卫通领域内任意类型的三轴天线上。

A tracking strategy for small-sized triaxial antennas was proposed to address the issues of poor tracking performance and algorithm complexity in low-earth orbit (LEO) terminal applications. Through analysis of high-elevation angle tracking characteristics, a mathematical model for antenna tracking pointing angles was established, and formulas for antenna pointing angles in different coordinate systems as well as beam spatial pointing were derived. Validated using a set of LEO satellite data, results demonstrate that the antenna tracking error remains less than one-tenth of the beam width during satellite transit, meeting the operational requirements of LEO terminals. The derivation process of the antenna tracking pointing angles possesses universality and can be extended to any type of triaxial antenna in satellite communication applications.