The resolution and above all the stability of the geodetic reference frames is crucially important when global change, such as the sea level rise is observed. In this context systematic errors are still presenting a significant challenge to the measurement techniques of space geodesy. In order to overcome this unfortunate situation for the satellite laser ranging technique, we have utilized the injection of a mode-locked laser to provide a stable low-noise link between the optical domain, where the measurements are carried out, and the microwave regime in which the station clock is defined. We obtained a considerably enhanced measurement delay stability by 10–20 ps over several days, albeit with some experimental challenges. The implementation of waveform scans required us to revisit the issue of target structure and intensity variation in satellite laser ranging.

当观察到海平面上升等全球变化时，大地测量参考系的分辨率，尤其是稳定性至关重要。在这种情况下，系统误差仍然对空间大地测量学的测量技术提出了重大挑战。为了克服卫星激光测距技术的这种不幸情况，我们利用锁模激光器的注入在进行测量的光域和微波区域之间提供稳定的低噪声链路。定义了站时钟。尽管存在一些实验挑战，但我们在几天内获得了 10-20 ps 的测量延迟稳定性的显着增强。波形扫描的实现要求我们重新审视卫星激光测距中的目标结构和强度变化问题。