|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于光谱与几何匹配的GOCI与MODIS交叉辐射定标显示文摘海洋卫星COMs-1((Communication,Ocean&Meteorological Satellite-1)上携带的GOCI(Geostationary Ocean Color Imager)传感器以海洋监测为主,也具备较好的陆地监测潜力,但传感器陆地辐射特性存在偏差。为改善GOCI陆地辐射特性,基于MODIS数据,对GOCI可见光和近红外波段开展交叉辐射定标,弥补场地定标成本较高、定标参数更新周期长的不足,拓展其陆地定量遥感监测能力.交叉辐射定标中,考虑了GOCI和MODIS传感器相应波段光谱响应函数之间的匹配;通过辐射传输模拟,订正两传感器观测角度对辐射定标的影响;通过选取两传感器同一过境时刻的数据,降低太阳角度对辐射定标的影响,提高交叉定标精度.通过MODIS数据模拟的GOCI相应波段的表观辐亮度与GOCI实测结果比对,R^2大于0.88。对定标结果进行初步验证,表明交叉辐射定标后,GOCI陆地上的辐射特性满足基本的定量遥感需求。 | 张玉环 毛慧琴 王中挺 郭伟 厉青 李正强 陈兴峰 陈辉 | 2016 | 大气与环境光学学报2016，11，6： | 5 |
| 2 | FY-3A卫星星内辐射剂量评估与分析显示文摘对FY-3A卫星近四年的辐射剂量数据进行分析,结果表明,在1 mm铝的等效屏蔽厚度下,星内辐射剂量存在显著的方向性差异,+Y向剂量增长变化显著大于+Z向.深入分析剂量变化与带电粒子辐射关系后发现,太阳质子事件期间的高能质子增长不会对辐射剂量增长变化产生显著影响;而高能电子是剂量增长变化的主要贡献者,其中扰动导致的高能电子通量强增长是使得辐射剂量显著增加的主要原因,并显著影响到卫星+Y向.进一步与工程常用SPENVIS剂量计算结果的对比表明,实测能更好地反映剂量动态变化和方向差异.综上,实测剂量数据对于同类工程星内器件的合理布局和工程防护设计具有一定指导和参考价值. | 王春琴 孙越强 曹光伟 张贤国 李嘉巍 张效信 荆涛 沈国红 张申毅 黄聪 梁金宝 史春燕 韩英 | 2015 | 空间科学学报2015，35，1： | 1 |
| 3 | Proton belt variations traced back to Fengyun-1C satellite observations显示文摘We used historical data to trace trapped protons observed by the Fengyun-1C(FY-1C)satellite at low Earth orbits(~800 km)and chose data at 5–10 MeV,10–40 MeV,40–100 MeV,and^100–300 MeV from 25 March to 18 April 2000 to analyze the proton variations.Only one isolated strong storm was associated with a solar proton event during this period,and there was no influence from previous proton variations.Complex dynamic phenomena of proton trapping and loss were affected by this disturbance differently depending on the energy and L location.The flux of 5–10 MeV protons increased and created new trapping with a maximum at L^2.0,and the peak flux was significantly higher than that at the center of the South Atlantic Anomaly.However,at higher L,the flux showed obvious loss,with retreat of the outer boundary from L^2.7 to L^2.5.The increase in the 10–40 MeV proton flux was similar to that of the 5–10 MeV flux;however,the peak flux intensity was lower than that at the center of the South Atlantic Anomaly.The loss of the 10–40 MeV proton flux was closer to the Earth side,and the outer boundary was reduced from L^2.3 to L^2.25.For the higher energy protons of 40–100 MeV and 100–300 MeV,no new trapping was found.Loss of the 40–100 MeV protons was observed,and the outer boundary shifted from L^2.0 to L^1.9.Loss was not obvious for the 100–400 MeV protons,which were distributed within L<1.8.New proton trapping was more likely to be created at lower energy in the region of solar proton injection by the strong magnetic storm,whereas loss occurred in a wide energy range and reduced the outer boundary on the Earth side.Similar dynamic changes were observed by the NOAA-15 satellite in the same period,but the FY-1C satellite observed more complex changes in lower energy protons.These results revealed that the dynamic behavior of protons with different L-shells was due to differences in the pitch angle.Possible mechanisms related to new trapping and loss are also discussed.These mechanisms are very important for understanding the behavior of the proton belt in the coming solar cycle. | ChunQin Wang Zheng Chang XiaoXin Zhang GuoHong Shen ShenYi Zhang YueQiang Sun JiaWei Li Tao Jing HuanXin Zhang Ying Sun BinQuan Zhang | 2020 | Earth and Planetary Physics2020，4，6： | 1 |
| 4 | 2011—2015年辐射带电子动态FY-3B卫星实测结果显示文摘FY-3B卫星为轨道高度约800 km,倾角98°的极轨气象卫星,星上高能电子探测器可开展宽能谱、高时间分辨的电子辐射长时间连续监测.2011—2015年极低太阳活动周期内,FY-3B卫星高能电子探测器对0.15~5.7 MeV不同能量高能电子在南大西洋异常区以外的辐射带区域的观测结果显示:在所有的辐射带区域,低能量的电子比高能量的电子更容易出现增强,填充槽区和进入到内带更低L区域的可能性更大.0.15~0.35 MeV的电子长期充斥于外辐射带和槽区,而1 MeV以上的电子大部分时间分布于外辐射带,在太阳风速度、地磁活动极弱的2014年呈现长时间极弱通量水平.2015年频繁增强的扰动导致电子通量水平整体升高,空间分布大范围扩散,1 MeV以上能量的电子在槽区位置也出现了分布.分析2014.5.10—7.30和2015.5.10—7.10两个典型时段内扰动参数对电子通量在不同区域动态分布的影响,结果表明:电子通量在外辐射带外边界区域动态与太阳风起伏变化关联显著.AE<300 nT,D st>-30 nT,SW<500 km·s^(-1)的持续长时间低水平扰动条件下,电子通量分布内边界出现在不低于L~4的位置,通量峰值出现在靠近L~5的位置;而在太阳风速度和地磁活动显著活跃的时候,电子会穿越外辐射带深入到槽区,在外辐射带的通量峰值则出现在L约3.5~3.9的位置.2015年的3月和6月两起强磁暴使得电子向更低L注入,>1 MeV以上的电子在低至L~2.8的槽区出现显著增长.在极低通量水平下,AE指数短时增加超过300 nT的亚暴活动会导致0.15~0.35 MeV电子超过1个量级的增长变化.上述结果对于准确认识辐射带电子不同时期的基本特性、发现能量电子动态潜在的基本物理过程,构建更准确的辐射带电子模型有着重要的参考意义. | 王春琴 张贤国 沈国红 张珅毅 张效信 黄聪 李兴冀 | 2021 | 地球物理学报2021，64，6： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员