曲靖非相干散射雷达空间碎片实测数据分析

The Data Analysis of the Space Debris Observation by the Qujing Incoherent Scatter Radar

文中分析了曲靖非相干散射雷达实测空间碎片数据,主要结果包括:1)空间碎片主要分布在600～1100km和1400～1500km两个距离区间,特别是在800km和1000km出现两个峰值;2)径向速度主要分布在-2～2km/s; 3)对于780km的探测距离门,探测流量约7个/小时,低于北极雷达观测结果,但与空间碎片流量模型可比拟;4)与编目库对比发现该雷达可探测1000km的18cm或500km的5cm目标;5)距离测量误差约1.47km,位置测量误差约15km; 6)不同指向时雷达实际探测的空间碎片数目不同,但与基于编目库目标仿真结果的基本特征一致;7)可能具备发现未知小尺寸(小于8cm)空间碎片的能力,但需更多数据验证分析;8)实测的空间碎片散射回波有时会出现周期性振荡现象,表明空间碎片穿过雷达波束期间可能处于周期性运动状态,其周期长短不一。

The variation of space debris parameters including range, velocity and radar cross-section is investigated in the different conditions using the measurement from the Qujing Incoherent Scatter Radar(QJISR).The main results include: 1)the space debris distribute mainly in the range of 600-1100 km and 1400-1500 km with two peaks occurring at the 800 and 1000 km, which is well consistent with the one from other radars.2) the radial velocity mainly distribute in the range of -2~2 km/s.3) the detectable number per hour in the range width 780 km is about 7/hour, which is far less than the one measured at high latitude but is comparable with that from the model value.4) the minimal detectable size of space debris is 18 cm at 1000 km, which is the same to 5 cm at 500 km.5) the mean range error is about 1.47 km and position error is about 15 km, which is mainly related to the azimuth and elevation error.6) the detectable number is different with different azimuth and elevation.7) QJISR maybe own the ability to detect the new unknown space debris with the size less than 8.5 cm.8) The scatted echo show some periodical oscillations, which shows that the space debris passing through the beam is probably rotating with different period.The above results show that the QJISR own the good perspective in the model validation, detection of unknown space debris.