�������ǹ�������ĵ͹���������������Ϸ�   总被引：2，自引：1，他引：1  

马开锋  彭碧波  洪樱 《大地测量与地球动力学》2007,27(1):85-90

???????????????仯????????????????GPS??????????????????????????????????????????????????????????????????????λ?ü????????????????????????????????????GPS??????15????????????25????????????????????????????????????25??????????????????????????????  相似文献   

���ҹ��������ǵ���ϵͳ���Ƿ�Χ����չ����������̽��   总被引：1，自引：1，他引：1  

刘根友  郝晓光  陈晓峰  孙保琪  彭碧波  周旭华  柳林涛  胡小刚 《大地测量与地球动力学》2007,27(5):115-118

????????????????????????????????Χ????????????????????????????????????????????????????????????4??IGSO????????????????????????Χ???γ55??????????γ75??  相似文献   

OpenGL虚拟相机模拟摄影测量二次成像     

宋碧波  卢小平  孙晓峰  卢遥  胡伟 《测绘通报》2012,(7):21-23,56

利用OpenGL虚拟相机重现摄影测量过程,借助OpenGL中的高级函数对已知摄影参数的影像进行二次成像模拟,建立OpenGL透视成像各函数参数与摄影测量内外方位元素之间的定量表达式,实现利用OpenGL对航空摄影测量获取影像过程的成像模拟。试验结果表明,在已知空间物体的三维信息和摄影参数的基础上,获取的空间物体二次成像结果与UCD相机获取的航空影像完全叠合。  相似文献   

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陈润静  彭碧波  范城城  高凡 《大地测量与地球动力学》2012,32(6):94-98

??????????????????????????????????????????????????????????????????????????????????????С????????????????????????????????????????????????????????????????,??????????????????????????????????????????????壬??????????????????????????????????Ч???б???????ж?????????????????????????????????????δ?????????????????ó??????????????????????GRACE?????????????????????????????????????Ч??????????????????  相似文献   

Improved-GRACE����������������Ż��о�   总被引：12，自引：3，他引：9  

郑伟  许厚泽  钟敏  员美娟  彭碧波  周旭华 《大地测量与地球动力学》2010,30(2):43-48

???????????????????ü????????????????GPS????????λ????????????????????????????????????????????????????????????????Improved??GRACE?????????????????????????????????????????????1????300?????????350 km???????????????????????3.993??10 ^-1 m??????300 km??250 km???????????????????8.770????77.145????????400 km??450 km??????????????????8.718????75.307????2??????50 km???????????????????????3.993??10^-1 m??????110 km??220 km??????????????????1.259????1.395????3????????????Improved??GRACE????????????????????????????????350 km??50 km?????  相似文献   

Earth gravity field recovered from CHAMP science orbit and accelerometer data   总被引：1，自引：1，他引：0  

ZHOU Xuhua WU Bin PENG Bibo XU Houze 《地球空间信息科学学报》2006,9(4):250-254

IntroductionSince the launch of man-made satellite early in1957 ,the research for satellite gravity has beentaken a wide attentioninfield of geodesy .Early ,the ground-based satellite tracking has providedan observational data set which has been used tode…  相似文献   

��-�����ٲ���ģʽ�й���߶ȵ��Ż�ѡȡ   总被引：14，自引：5，他引：9  

郑伟  许厚泽  钟敏  员美娟  周旭华  彭碧波 《大地测量与地球动力学》2009,29(2):100-105

???????????????????????????????120??GRACE???????????????????????1????????????????100 km??????????????10??????????????????????????????GRACE????????????????2????????????????????????????500 km?????????20?????????????????0.221?????Ч??????50???80???100???120?????????9.621????92.857????418.957????1 895.369????3??????????????????????????????????????????JPL??????GRACE?????????120???????500 km????????????????澫???17.316 cm????????450 km??400 km??350 km?????????????????1.566????4.502????10.871????4?? ???????????????????й?????????350 ~ 400 km??????120?????????????????  相似文献   

地面三维激光扫描点位精度评定   总被引：10，自引：2，他引：8  

王玉鹏  卢小平  葛晓天  卢遥  宋碧波 《测绘通报》2011,(4):10-13

通过建立高精度控制网作为室外检校场,借助标靶对Leica ScanStation2型三维激光扫描仪进行实地测试,并对达到的点位精度进行分析与评定,得出该仪器扫描距离为40 m、80 m时,点位精度分别为±4.7 mm和±6.3 mm.研究结果可为三维激光扫描技术的进一步应用提供经验和借鉴.  相似文献   

The trophic state of lake water regulates spatial-temporal variations of bloom-forming Microcystis     

Li  Yinxia  Liu  Bibo  Liu  Shuaixia  Li  Dunhai 《中国海洋湖沼学报》2017,35(2):415-422

Although biomass variations in Microcystis and microcystin have been widely reported,few studies have addressed whether different trophic states of natural lake water affect the spatial-temporal variations in abundances of microcystin-producing Microcystis in a given bloom.In this study,we used a harmful algal bloom in Chaohu Lake,eastern China,as an example to investigate the mutual relationship between different nutrient states and environmental factors,and the impact on Microcystis.Overall,cyanobacteria and Microcystis were more abundant in the middle and western parts of the lake under high nutrients levels,while in the eastern part,nutrient concentrations were low enough to limit biomass,and their fluctuations affected the contents of toxic Microcystis.Moreover,microcystin concentration was correlated positively to nutrient levels and Microcystis biomass during bloom developing in 2013 from June to August.Temporally,the cellular content of total microcystin was lowest when the bloom peaked in intensity.Our results suggest that lake eutrophication not only results in cyanobacterial blooms,but may also increase the proportion of toxic Microcystis species and their cell-bound MCs contents(i.e.microcystin cell quotas) under mild eutrophication.The present investigation provided molecular evidence for the selection of MC-producing and non-MC-producing genotypes.The current study provides new evidence advocating the monitoring of partitions of large lakes when studying cyanobacteria and toxin-contaminated freshwaters,which will be beneficial for both water agencies and water researchers.  相似文献   

����������ģ���о���չ����״   总被引：10，自引：3，他引：7  

郑伟  许厚泽  钟敏  员美娟  彭碧波  周旭华 《大地测量与地球动力学》2010,30(4):83-91

????????1966??????????????????????????????????????????????????Σ???????????CHAMP?????????????????????????????????????????? EIGEN-CHAMP03S??EIGEN-3P????????????г????????EIGEN-1S??EIGEN-2??EIGEN-3P??EIGEN-CHAMP03S????????????????????????????????????GRACE????????????????GGM02S??WHIGG-GEGM01S????????????????????????????????????????????????CHAMP??GRACE?????????????????????????????EIGEN-CG01C??EIGEN-CG03C??EIGEN-GL04S1??EIGEN-5C?????????????EIGEN-GRACE01S??EIGEN-GRACE02S??GGM01S??GGM02S??WHIGG-GEGM01S??GRACE-only????  相似文献