宁夏地磁台站建设经验浅谈   总被引：1，自引：0，他引：1  

杜文勇  訾少刚  马小军  贺永忠 《高原地震》2010,22(1):54-58

根据宁夏地磁台站磁房建设,介绍了地磁台站建设中场地磁性控制、建筑材料磁性检测等方面的一些经验,对其他环境类似的兄弟台站具有较好的借鉴意义。  相似文献   

RXTE observations of the strongly absorbed sources IGR J16318-4848 and IGR J16358-4726     

M. G. Revnivtsev 《Astronomy Letters》2003,29(10):644-648

We analyzed the RXTE observations of two strongly absorbed sources, IGR J16318-4848 and IGR J16358-4726. We were able to obtain the 3–25 keV spectra of the sources by taking into account the contribution of the Galactic diffuse background to the X-ray flux recorded with the RXTE/PCA spectrometer. The spectra of the sources are well described by a power-law decrease of the photon flux with energy with a photon index of ～1 and strong photoabsorption. The photoabsorption column density n_HL for IGR J16318-4848 derived from the RXTE observation on March 14.1, 2003, is shown to be much higher than its value obtained by the XMM observatory on February 10.7, 2003. This result may suggest that the source has variable absorption that may depend on the orbital phase of the system. We point out that all of the three X-ray sources discovered by the INTEGRAL observatory in the region (l,b)～(336,0) (IGR J16318-4848, IGR J16320-4751, and IGR J16358-4726) have strong intrinsic photoabsorption and may be high-mass binaries. Their proximity to the region where the tangent to the Galactic spiral arm passes, i.e., to the region of enhanced concentration of young high-mass stars, can serve as an indirect confirmation of this assumption. If our assumption about the positions of the sources in the Norma spiral arm is valid, then we can roughly estimate their heliocentric distances: ～6–8 kpc.  相似文献   

Station characteristics and CSTAR data measurement of LEO space-debris monitoring at Kunlun Station,Antarctica          下载免费PDF全文

Yang Chenwei  Jiang Peng  Jia Minghao  Zhou Xu  Zhang Shaohua  Zhou Hongyan  Li Gongqiang  Jiang Hai  Cheng Haowen  Liu Jing  Li Zhengyang 《极地研究》1988,31(2):128

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铁岭地震台前兆数字化观测系统常见故障分析及处理     

佟国刚  刘继庆  张创军 《地震地磁观测与研究》2005,(Z1)

论述铁岭地震台在前兆数字化观测过程中出现的微机通讯控制系统、公用设备、前兆仪器主机及传感器之间某一环节,由于雷击或电路自然故障,导致不能正常通信和数据不能正常采集,以及采集后的数据为非法前兆数据的故障判别,并给出简单的故障排除方法。  相似文献   

High-resolution dynamics of a deep-sea hydrothermal mussel assemblage monitored by the EMSO-Açores MoMAR observatory     

《Deep Sea Research Part I: Oceanographic Research Papers》2014

Although the spatial distribution of hydrothermal vent assemblages in relation to environmental conditions has been assessed in several studies, there is little documented data on the temporal variation of the fauna and corresponding abiotic factors in a vent community. Here, we present one of the longest integrated (faunal and environmental data) time series ever obtained in a hydrothermal ecosystem. The data were acquired using the TEMPO ecological module that was deployed between 2006 and 2008 on the Mid-Atlantic Ridge, providing the first insights into the day-to-day variations in a Bathymodiolus azoricus mussel assemblage from the Lucky Strike vent field for the 48 days during which the video camera operated. The time-series yielded additional valuable information on longer-term variation in faunal distribution (comparing ~2 years), temperature (11.7 months) and iron concentrations (3.8 months).Results from daily observations showed that the vent mussel assemblage was quite stable over the 48 days of the study, reflecting the relative stability of environmental conditions during this period. B. azoricus mussels appeared to thrive in areas of very limited hydrothermal fluid input in habitats that are, as in other deep-sea ecosystems, significantly influenced by ocean tidal signals. Variation in species abundance was observed but, with the exception of Mirocaris fortunata shrimp, no links could be established with measured environmental variables. Although we did not observe any clear tidal influence on vent fauna, it is likely that physiological processes and species’ activities are influenced by these periodic variations. Longer time series are currently being acquired by different experiments deployed on the EMSO-Açores MoMAR observatory (2010–2013 and still recording). They should further improve our knowledge of the dynamics of hydrothermal systems and their associated faunal communities.  相似文献   

A Remotely Operated Serial Sampler for Collecting Gas-Tight Fluid Samples   总被引：1，自引：1，他引：0  

吴世军  杨灿军  丁抗  谭春阳 《海洋工程》2015,29(5):783-792

This paper describes the design, construction and preliminary test results for a gas-tight serial sampler intended to be deployed at seafloor for long-term operation to take time-series fluid samples from deep-sea environments such as cold seeps, water column and hydrothermal vents. The serial sampler is a modular system that is based on independent and identical sampling modules, which are designed to collect six 160 ml gas-tight fluid samples maintained at high pressure to a depth of 4000 meters. With two working modes, the sampler can be deployed either with seafloor cabled observatory for remote control or as a stand-alone device for autonomous operation. A prototype of the instrument has been constructed and tested on the MARS cabled observatory for two months. The laboratory and field tests proved the success of the design and construction of the serial sampler, and indicated the potential for future ocean sciences.  相似文献   

成都地磁台墩差、方位角的测量与评估     

叶富华  杜斌  陈运伦  林建  胡俊明 《四川地震》2007,(3):18-21

通过系统整理成都地磁台墩差及天文方位角的观测资料,对测量仪器比测方法、观测人员、测量精度等方面进行分析评估,提出了本项工作的主要技术成果,并以便查表的形式给出了成都台新旧观测室等11个仪器观测墩相互间的F、I、D、H、Z各地磁要素的墩差,以及各墩与目标、标志的方向角、方位角。本文还从另一方面证明了成都地磁台良好的观测技术条件和稳定的观测质量,这些资料对于台站标准化,数字化都是有重要意义的。  相似文献