Feasibility of developing an ionospheric E-region electron density storm model using TIMED/SABER measurements

We present a new technique for improving ionospheric models of nighttime E-region electron densities under geomagnetic storm conditions using TIMED/SABER measurements of broadband 4.3 μm limb radiance. The response of E-region electron densities to geomagnetic activity is characterized by SABER-derived NO⁺(v) 4.3 μm Volume Emission Rates (VER). A storm-time E-region electron density correction factor is defined as the ratio of storm-enhanced NO⁺(v) VER to a quiet-time climatological average NO⁺(v) VER, which will be fit to a geomagnetic activity index in a future work. The purpose of this paper is to demonstrate the feasibility of our technique in two ways. One, we compare storm-to-quiet ratios of SABER-derived NO⁺(v) VER with storm-to-quiet ratios of electron densities measured by Incoherent Scatter Radar. Two, we demonstrate that NO⁺(v) VER can be parameterized by widely available geomagnetic activity indices. The storm-time correction derived from NO⁺(v) VER is applicable at high-latitudes.     

On the measurements of the moon’s infrared temperature and its relation to the phase angle

Radiometric measurements of the thermal radiation originating from the moon’s surface were obtained using an infrared detector operating at wavelengths between 8 and 14 μm. The measurements cover a full moon cycle. The variation of the moon’s temperature with the lunar phase angle was established. The lunar temperatures were 391 ± 2.0 K for the full moon, 240 ± 3.5 K for the first quarter, and 236 ± 3 K for the last quarter. For the rest of the phase angles, the lunar temperature varied between 170 and 380 K. Our results are comparable with those obtained previously at these phase angles. For the new moon phase, the obtained temperature was between 120 and 133 K. With the exception of the new moon phase, our measurements at all the phase angles were consistent with those obtained using Earth-based data and those obtained by the Diviner experiment and the Clementine spacecraft. At the new phase, our measurements were comparable with those obtained from the ground but were significantly higher than those obtained by the Diviner and Clementine data. We attribute this inconsistency to either the calibration curve of our detector, which does not perform well at very low temperatures, or to infrared emission from the atmosphere. A simple linear model to predict the lunar temperature as a function of the phase angle was proposed. The experimental errors that affect the measured temperatures are discussed.     

一种红外焦平面阵列相对光谱响应自动测试系统

目前测试红外焦平面阵列相对光谱响应参数时，需要人工测量波段中每个波长点的光谱响应，针对测试过程繁琐和测试时间长的问题，在基于现有的不同开发平台开发的单色仪和数据采集系统的基础上，利用动态链接库技术，研制了一种红外焦平面阵列相对光谱响应自动测试系统，该系统测试过程简化，自动化程度提高。经过对比分析，自动测试与人工测试结果具有较好的一致性，自动测试比人工测试更加可靠。     

红外无损检测技术粘接结构产品应用

介绍了红外无损检测技术的检测原理和对粘接结构产品的试验应用。试验结果表明,红外无损检测技术可以有效的对玻璃钢泡沫夹层、软木粘接、碳纤维蒙皮蜂窝夹层等粘接结构进行产品质量检测,具备广阔的应用前景。     

涡轮叶片综合冷却效率实验研究

为了研究气冷涡轮叶片综合冷却效率及其影响因素,采用红外热像仪对叶片表面温度场进行了测量,同时在叶片中截面布置了15支热电偶用于校准红外热像仪的测量结果,获得了叶片表面温度场分布以及流量比、温比和落压比对叶片综合冷却效率的影响规律.实验结果表明:叶片温度场分布受内部冷却和外表面换热共同影响,叶片前缘与叶尖处于较高温度状态...     

自旋卫星红外地中脉冲丢失情况下姿态确定分析与应用

实际应用中,由于遥测故障或脉冲重叠等多种原因,获取姿态脉冲信息时,可能缺少某些测量脉冲,为姿态确定的方法选择造成一定难度。针对海上测量弧段,某自旋卫星在红外地中脉冲丢失,仅有地出脉冲以及太1、太2脉冲时的几何定姿方法问题,通过对其原理、概念进行分析,制定自旋卫星红外地中脉冲丢失情况下定姿的方案与方法。该方法主要用于海上实时姿态监视,应急情况下也可以用于姿态的粗控。该研究为航天测量船应用测控软件的设计提供了良好基础。     

机载曳光弹的紫外产生机理

立足于现有装备的基础上,大力发展经济,可靠,方便的紫外干扰技术,对我军而言不啻是一种我服的有效手段,在原子物理学理论指导下,本文详细地介绍了产生紫外线光谱重要的一环,原子材料紫外光谱的产生方法,文章的末尾还给出了实验的结果。     

Low-velocity impact response and infrared radiation characteristics of thermoplastic/thermoset composites

The low-velocity impact response and infrared radiation characteristics of composites have rarely been focused on simultaneously. This study aims to investigate the low-velocity impact response and infrared radiation characteristics of the glass fiber reinforced thermoplastic polypropylene and carbon fiber reinforced thermosetting epoxy resin laminates wildly used in the aircraft industry. The impact tests were conducted at five energy levels. Characterization parameters such as impact load, dis...     

超快激光诱导等离子体成丝光谱

飞秒激光等离子体光丝大气中传输的独特物理过程在航天领域具有重要的应用前景。采用仿真与实验,验证了飞秒等离子体成丝的光谱展宽特征,获得了超快等离子体光丝在不同参数特征下,覆盖从可见到红外探测系统的波谱范围,及保持系统相对稳定的特征,对于借助强激光等离子体光丝光谱进行红外特征探测具有重要的启发作用。     

高LET值的获得及在SEB效应研究中的应用

在HI 13串列加速器上,为满足单粒子效应研究对更大的线性能量转移(LET)值的要求,发展了高剥离态离子的加速与引出技术,及0°束 Q3D磁谱仪焦面辐照方法。已得到的LET值为86 7MeV/mg/cm2(45°倾斜入射,在Si中射程R～20μm),束斑在Φ10到Φ50和注量率从几十到5×104·sec-1·cm-2之间可调。论文详述了这一特殊方法成功应用于MOSFET功率管的单离子烧毁效应实验。