The tumbling motion of defunct satellite TOPEX/Poseidon (T/P) is governed by the μ-scale Solar Radiation Pressure (SRP) torque that spun up the satellite from the initial, nadir-pointing to the current fast spinning state [1]. In this paper, we advance the methods of Quanta Photogrammetry (QPM) in an effort to determine satellite attitude parameters – the inertial orientation of the body angular momentum vector $\mathit{L}$, the rotational phase and rate as well as the object pole coordinates with respect to $\mathit{L}$; the determined pole offset is 3.52°. The presented data support the hypothesis that the full characteristics of the satellite attitude dynamics can be obtained from a single radiant photogram measured by the photon-counting system of the Graz Satellite Laser Ranging (SLR) Observatory during an overhead pass.

The analysis of the observed radiant signature of T/P gives the elevation angle of the normal vector to the solar array front surface at −1.7°, RMS = 0.63°, in the spacecraft body-centered reference frame. This information, along with the pole position, is used to model the SRP forces and torques on the satellite and determine the T/P moment of inertia $I=69728,{\sigma }_I=75.2\left[kg{m}^2\right]$, by best-fitting long-term spin simulation to the observed trend.

废弃卫星 TOPEX/Poseidon (T/P) 的翻滚运动受 μ 尺度太阳辐射压力 (SRP) 扭矩控制，该扭矩使卫星从初始、最低点指向当前快速旋转状态 [1]。在本文中，我们推进了量子摄影测量 (QPM) 的方法来确定卫星姿态参数——身体角动量矢量的惯性方向$\mathit{升}$，旋转相位和速率以及物体极坐标相对于 $\mathit{升}$; 确定的极点偏移为 3.52°。所提供的数据支持这样一个假设，即可以从格拉茨卫星激光测距 (SLR) 天文台的光子计数系统在高空通过期间测量的单个辐射照片中获得卫星姿态动力学的全部特征。

对观测到的 T/P 辐射特征的分析给出了在航天器体心参考系中 -1.7°，RMS = 0.63° 的太阳能电池阵列前表面法向量的仰角。该信息与磁极位置一起用于模拟卫星上的 SRP 力和扭矩并确定 T/P 惯性矩$\mathrm{一世}=69728,{\sigma }_{\mathrm{一世}}=75.2\left[克G{米}^2\right]$，通过对观察到的趋势进行最佳拟合的长期自旋模拟。