They used computer models to track its path, but until the Russian ship STS Pallada sailing from Honolulu contacted them last month, they had no direct observation of the massive debris field.

他们利用计算机模型来跟踪其路径，但直到上个月俄罗斯轮船STSPallada从檀香山航行联络他们，他们都没有直接观察到大量的碎片带。

youdao

Besides, the bubble density and reflectance increased with the wake observation position approaching the target ship.

同时，随着观测点在尾迹中的位置距目标船的接近，气泡密度不断增大，反射率也随之增强。

youdao

The effective long-range surface observation system should be set up to improve the combat capability and survival capability of surface ship formation.

为提高水面舰艇编队的作战能力和生存能力，应建立有效的远程对海观察体系。

youdao

The USNS Observation Island, a ship that uses telemetry to monitor objects in space, will collect information on the satellite both before and after the missile launch.

CNN: Attempt to shoot down spy satellite to cost up to $60 million