数字前兆遥测台网数据库及数据处理系统

本文介绍了数字前兆遥测台网中心数据库及数据处理系统的总体结构，实现的基本功能和主要特点。着重介绍了该系统软件结构、工作流程、软件设计方法和主要实现技术。     

BY标定遥测仪及其应用

介绍用单片机控制的ＢＹ标定遥测仪。该仪器具有自动完成标定的功能，可广泛应用于我国地震系统的ＦＳＱ型浮子水管斜仪和工程测量中的静力水准遥测仪的格值标定。     

基于z坐标海洋模式的全球正压潮波数值模拟研究

The performance of a z-level ocean model, the Modular Ocean Model Version 4(MOM4), is evaluated in terms of simulating the global tide with different horizontal resolutions commonly used by climate models. The performance using various sets of model topography is evaluated. The results show that the optimum filter radius can improve the simulated co-tidal phase and that better topography quality can lead to smaller rootmean square(RMS) error in simulated tides. Sensitivity experiments are conducted to test the impact of spatial resolutions. It is shown that the model results are sensitive to horizontal resolutions. The calculated absolute mean errors of the co-tidal phase show that simulations with horizontal resolutions of 0.5° and 0.25° have about 35.5% higher performance compared that with 1° model resolution. An internal tide drag parameterization is adopted to reduce large system errors in the tidal amplitude. The RMS error of the best tuned 0.25° model compared with the satellite-altimetry-constrained model TPXO7.2 is 8.5 cm for M_2. The tidal energy fluxes of M_2 and K_1 are calculated and their patterns are in good agreement with those from the TPXO7.2. The correlation coefficients of the tidal energy fluxes can be used as an important index to evaluate a model skill.     

GDGL—97型光电隔离器在遥测地震台网数据采集与处理系统中的应用

遥测地震台网数据采集与处理系统是将各遥测台站传输到记录中心的地震信号经计算机处理后,进行地震速报的实时系统,为尽可能地减少干扰,保证该系统的正常运行,准确无误地处理每个地震事件,我们研制了ＧＤＧＬ－９７型光电隔离器。经在沈阳遥测地震台网数据采集与处理...     

SL1型遥测雨量计典型故障分析

ＳＬ１型遥测雨量计典型故障分析姜树业（商丘市气象局·４７６００）故障之一：记录器电磁铁和电磁计数器无规律地跳动,造成记录混乱。附图记录器线路图如图所示,当感应器无导通信号输入时,干簧管接点是常开的,晶体管３ＤＧ１２基极上无偏流而处于截止状态,中间继电...     

无人机遥感组网冗余容错的研究

针对无人机在遥感遥测领域组网过程中存在的随机故障,进而导致无人机在任务执行过程中任一约束的及时响应缺失,将会影响任务总体结果或导致整个任务部分及完全失败的问题,论文提出无人机遥感组网冗余容错方法。该方法采用领航—跟随的无人机编队飞行模式,多台组网无人机稳定可靠完成指定的飞行任务,验证了冗余容错方法,解决了无人机遥感组网冗余容错技术中的有和无的问题。     

基于IP的遥测地震台网探讨

数据传输是遥测地震台网的运行基础之一。新一代数据传输模型—基于IP的遥测地震台网将取代现役数据与数据描述相分离的直接基于物理层通信模型。新模型将减少乃至杜绝传输性数据丢失；提高组网的灵活性和即时性：降低运行费用；融合有人值守、无人值守和流动观测等方式。     

影响福建数字遥测地震台网震级测定的部分因素

通过对福建数字遥测台网1999年所监测到的“9.21”台湾南投大震群和“9.23”福州小震群中的一系列较大地震进行分析，利用地震的时间和空间相对集中这一特点，有效地避开震源、路径及随时间变化的地质背景等因素对测定震级的干扰，发现了对测定台网平均震级影响的主要因素，不仅仅来自于台站地质背景的影响、台网使用的起算函数的影响，而且还发现在一定距离内地震周期也会对台网平均震级测定产生明显的影响。通过计算地动位移随震中距衰减的系数和起算函数随震中距增幅的系数，求出起算函数引起震级偏差的大小，提出了改进和消除这些影响的方法。     

成都遥测台网速报简况

引言 成都遥测台网速报组以本台网实时处理系统为基础,采用西昌、自贡等小台网及人工速报台站报的资料,承担全省速报任务。当时感到最困难的是远震速报。那时,四川省地震局正好与日本东北大学地震观测研究所合作建设成都遥测台网实时处理系统,接着又先后进行有人台和遥测台网的数字化改造。一方面要求我们不断适应新的技术系统,另一方面又给我们提供了进一步改善速报的技术条件。在过去的8年里,我们全组齐心协力,从以下3方面努力:① 认真总结震相特征和速报定位经验,寻找处理速报难点的办法;② 努力学习新技术,适应技术系统的改造;③ 建立并…     

Mapping crustal S—wave velocity structure with SV—component receiver function method

In this article,we analyze the characters of SV-component receiver function of teleseismic body waves and its advantages in mapping the S-wave velocity structure of crust in detail.Similar to radial receiver function,SV-component receiver function can be obtained by directly deconvolving the P-component from the SV-component of teleseismic recordings.Our analyses indicate that the change of amplitude of SV-component receiver function against the change of epicentral distance is less than that of radial receiver function.Moreover,the waveform of SV-component receiver function is simpler than the radial receiver function and gives prominence to the PS converted phases that are the most sensitive to the shear wave velocity structure in the inversion.The synthetic tests show that the convergence of SV-component receiver function inversion is faster than tnat of the radial receiver function inversion.As an example,we investigate the S-wave velocity structure beneath HIA sta-tion by using the SV-component receiver function inversion method.