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指向误差     
相关语句
  pointing error
     Its tracking pointing error is reduced to ±1.65° by theoretical analysis and ±3.4° by experimental verification. The requirement for tracking pointing precision which is within ±6° is satisfied.
     经理论分析 ,其跟踪指向误差为± 1.6 5°,经实验测试 ,其跟踪指向误差为± 3.4° ,满足± 6°的跟踪指向精度要求 .
短句来源
     Pointing Error Analysis and Allocation for Flight Simulation Turntable
     飞行仿真转台指向误差分析及误差分配
短句来源
     Research on model of pointing error of a three-axis simulation turntable
     轴仿真转台指向误差的建模研究
短句来源
     Besides,the performance of LEO and MEO ISL affected by the pointing error is analyzed too.
     另外,还对受天线指向误差影响的LEO卫星和MEO卫星的星间链路性能进行了分析。
短句来源
     RESEARCH ON THE ANTENNA POINTING ERROR OF 25m RADIO TELESCOPE
     佘山25米天线导轨问题对指向误差影响的研究
短句来源
更多       
  directional error
     A theoretical analysis of the minimun directional error for the polar mounts antenna and its application in engineering
     极轴式天线最小指向误差理论分析及其工程应用
短句来源
     The obtained star maps are identified using the calibration result. It is indicated that optical axis directional error is 4.846 2″,which shows the calibration result is more perfect.
     利用标定结果对连续拍摄的星图进行识别,得到星敏感器光轴指向误差为4.846 2″,标定结果比较理想。
短句来源
     The directional error of the three-axis flight platform-one of the factors affecting the aiming error is discussed, and the distribution method of three factors affecting the directional error is also presented.
     同时对影响瞄视误差之一的三轴飞行平台的指向误差做了研究,并提出了影响指向误差的三种因素的分配方法。
短句来源
     In this paper,a most simple formula of directional error for photoelectric theodolite isadvanced.
     本文提出了光电经纬仪指向误差的最简公式。
短句来源
  direction error
     A Method Used on Antiradiation Missile to Correct the Direction Error of the Inertial Axis
     一种用于反辐射导弹的惯导轴指向误差的修正方法
短句来源
     The time-domain/frequency-domain correlation algorithm is used to carry out azimuth compression, and relationship of multi-look processing sub-image is used to estimate the deviations of Doppler central frequency and Doppler frequency rate caused from antenna direction error or SAR moving distable and to perform image restoring.
     应用时墟-频域混合相关法进行方位压缩,利用多视处理子图像的关系估计由于天线指向误差及SAR运动不稳引起的多普勒中心频率和多普勒频率变化率的偏差,进行图像重建。
短句来源
     A combined guidance concept incoporating passive radar homing with strapdown inertial guid ance is selected to work against radar cutoff for anti-radiation missile,the extended Kalman filter method is used to correct direction error of inertial axis.
     采用被动雷达寻的加捷联惯性制导复合制导方案做为反辐射导弹对抗雷达关机的措施,应用广义卡尔曼滤波法解决了惯导轴指向误差的修正问题。
短句来源
     In this paper, a generalized kalman filtering method is used on an air to ground antiradar missile to slove the correction problem for the basic axis direction error of inertial terminal gnidance.
     本文采用广义卡尔曼滤波方法解决空地反雷达导弹抗雷达关机方案中出现的惯性末制导基准轴指向误差的修正这一问题。
短句来源
     In this paper,a method of passive radar-homing guidance combinedstrap—clown inertial guidance is used on an antiradiation missile to work againstradar stopping radiating. The direction error of inertial axis is corrected by an ex-tended kalman filter.
     采用了被动雷达寻的加捷联惯性制导做为反辐射导弹抗雷达关机的具体措施,采用了广义卡尔曼滤波方法解决了惯性制导的基准轴指向误差的修正问题.
短句来源
更多       
  steering error
     BEAMFORMING IN THE ENVIRONMENTS OF HIGH SNR AND LARGE STEERING ERROR
     高信噪比大指向误差环境中的波束形成
短句来源
     For the character of updating with time, this algorithm can restrict the steering error.
     由于采用的跟踪算法具有实时更新性,该波束形成方法对时变信号的指向误差能产生一定的抑制。
短句来源
     Simulations under a few scenarios in the presence of steering error, array geometry error and sensor phase error demonstrate that this algorithm has excellent robust performance.
     该方法由于采用迭代算法,避开矩阵求逆运算,因此运算复杂度较低,而且计算机仿真验证了该方法对指向误差、阵元位置误差和阵元相位误差具有良好的稳健性。
短句来源
     Under the environments of high signal-to-noise ratio (SNR) and large steering error, SMI algorithm and the projection method are invalid.
     在有用信号的信噪比较高且出现较大的指向误差时,SMI和投影方法失效。
短句来源
     An approach is proposed for recursive robust beamforming in the presence of steering error,array geometry error and sensor phase error.
     提出了一种针对指向误差、阵元位置误差或阵元相位误差的递归的稳健波束形成方法。
短句来源

 

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      pointing error
    Some interaction between eye and head eccentricity also contributed to the pointing error.
          
    The intensity distribution in a Gaussian beam is represented by a bundle of rays in which each ray has a random pointing error.
          
    Without VS 73% of the volunteers showed a systematic horizontal pointing error towards the right side.
          
    Consequently, the OP maneuver has a large pointing error.
          
    The root mean square of pointing error of moving cable car was measured and the displacements of cable car within the wind speed of 8 m/s, which is the maximal wind speed of the place where the FAST will be located, were evaluated.
          
    更多          
      directional error
    The neglect patients, unlike right brain-damaged patients without neglect, strongly reduced their rightward directional error in the supine compared with the upright position.
          
    A systematic directional error was observed at the initial portion of the trajectory.
          
    As the trajectory evolved, a different directional error emerged, resulting from a clustering of movement directions in two orthogonal axes.
          
    This pattern of directional error increased in amplitude as the delay increased, in contrast to the error at the initial portion of the trajectory which remained invariant with increasing delay.
          
    The constant directional error varied with target direction in a systematic fashion reproducing previous results and suggesting the same systematic distortion of the representation of direction in different memory delay tasks.
          
    更多          
      direction error
    By the criteria of direction error and amplitude error the minimum latency for visually guided saccades is 110-130 ms for three subjects and 160 ms for a longer latency subject.
          
    Developmental fractionation and differential discrimination of the anti-saccadic direction error
          
    Furthermore, multiple regression analysis showed that the direction of the ideal saccade contributed significantly to the endpoint direction error, not the direction of the hand path.
          
    Biophysics,21, 299-308, 1959) are generalized by considering that the angular direction error made by the driver, as well as the driver's reaction time are not constant but are randomly distributed.
          
    BMD values of Chinese men in Taiwan, displayed by one-direction error bar.
          
    更多          
      其他


    A method of yielding phase disturbance on the phased array antenna to make the phase quantization errors shift circularly across the aperture was proposed. It can smooth out significatly beam pointing deviation arising from the quantization errors of digital phase shifters. Some optimistic results were obtained from a theoretical analysis and simulation test. The data show that the beam pointing deviation may in general be reduced in an order of two, and may be reduced at least in the order of one for 2-bit...

    A method of yielding phase disturbance on the phased array antenna to make the phase quantization errors shift circularly across the aperture was proposed. It can smooth out significatly beam pointing deviation arising from the quantization errors of digital phase shifters. Some optimistic results were obtained from a theoretical analysis and simulation test. The data show that the beam pointing deviation may in general be reduced in an order of two, and may be reduced at least in the order of one for 2-bit phase shifters.

    利用在孔径面上产生的相位扰动,使量化相位误差沿孔径作循环移位的方法,可显著地平滑掉因数字移相器相位量化误差所引起的相阵天线波束指向误差。数据分析表明,指向偏离通常可降低至少两个数量级,即便数字移相器的位数低至2位,指向偏离也可降低一个数量级。

    In this paper, data of the total flux observations of the sun at λ 3.2cm obtained in the Nanjing Univ. Department of Astronomy (N. U. A) during the years 1980—1981 have been analysed. Correlation analysis of the N. U. A. records as against TYKW(Toyokawa Obs., Nagoya Univ., Toyokawa, Japan) shows that in the course of one month, the relative residual standard deviation difference between the daily flux values amounts to ±1.06%- ±3.03%, giving a mean value ±1.867%. The accuracy of observed values is stable. The...

    In this paper, data of the total flux observations of the sun at λ 3.2cm obtained in the Nanjing Univ. Department of Astronomy (N. U. A) during the years 1980—1981 have been analysed. Correlation analysis of the N. U. A. records as against TYKW(Toyokawa Obs., Nagoya Univ., Toyokawa, Japan) shows that in the course of one month, the relative residual standard deviation difference between the daily flux values amounts to ±1.06%- ±3.03%, giving a mean value ±1.867%. The accuracy of observed values is stable. The anologous results have been obtained from the error analysis. The mean ratio of solar flux densities between NUA9375 and TYKW9400 is linearly correlated with mean end temperature during a month. This indicates that observation values have a seasonal variation. Annual variation of the ratio is caused by the annual variation of back ground radiation, gain of the parabolaid antenna and atmospheric obsorption. The corrections to the antenna temperature caused by the absorption in a dark or awet day, pointing errors and gain shift have been obtained from the measurements and data analyses. They have been applied to the observed values. Comparing with the TYKW, One find that all the major bursts have been recorded with peak time deviation of ±0.15 min., and rms of relative peak intensity of ±20%.

    本文分析了1980年和1981年两年间3.2厘米波太阳射电总辐射观测资料。以日本TYKW的3.2厘米波的每日流量密度作比对标准,相关分析表明,一月中各日间的相对剩余标准差为±1.06%—±3.03%,平均为±1.89%,观测精度稳定。并作了误差分析,结果类似。月平均比与月平均终端温度有线性相关,这表明观测值有周年季节性变化,这可能与背景辐射,天线增益,大气吸收的季节变化有关。我们从测量和资料分析中得出了阴雨吸收和指向误差,增益漂移等造成的天线温度修正值。并对实测值进行了改正。与TYKW的相应爆发比对,大爆发无遗漏,个别图形欠完整,记录幅度的均方差平均为±20%,峰值时刻的变幅为±O.15分。南京大学天文系射电观测小组自1979年以来参加了太阳活动第21周的峰年观测,现将1980年至1981年期间的观测资料作一分析。

    In this paper, data of the total flux observations of the sun at λ 3.2cm obtained in the Nanjing Univ. Department of Astronomy (N. U. A) during the years 1980—1981 have been analysed. Correlation analysis of the N. U. A. records as against TYKW(Toyokawa Obs., Nagoya Univ., Toyokawa, Japan) shows that in the course of one month, the relative residual standard deviation difference between the daily flux values amounts to ±1.06%-±3.03%, giving a mean value ±1.867%. The accuracy of observed values is stable. The...

    In this paper, data of the total flux observations of the sun at λ 3.2cm obtained in the Nanjing Univ. Department of Astronomy (N. U. A) during the years 1980—1981 have been analysed. Correlation analysis of the N. U. A. records as against TYKW(Toyokawa Obs., Nagoya Univ., Toyokawa, Japan) shows that in the course of one month, the relative residual standard deviation difference between the daily flux values amounts to ±1.06%-±3.03%, giving a mean value ±1.867%. The accuracy of observed values is stable. The anologous results have been obtained from the error analysis. The mean ratio of solar flux densities between NUA9375 and TYKW9400 is linearly correlated with mean end temperature during a month. This indicates that observation values have a seasonal variation. Annual variation of the ratio is caused by the annual variation of back ground radiation, gain of the parabolaid antenna and atmospheric obsorption. The corrections to the antenna temperature caused by the absorption in a dark or awet day, pointing errors and gain shift have been obtained from the measurements and data analyses. They have been applied to the observed values. Comparing with the TYKW, One find that all the major bursts have been recorded with peak time deviation of ±0.15 min., and rms of relative peak intensity of ±20%.

    本文分析了1980年和1981年两年间3.2厘米波太阳射电总辐射观测资料。以日本TYKW的3.2厘米波的每日流量密度作比对标准,相关分析表明,一月中各日间的相对剩余标准差为±1.06%——±3.03%,平均为±1.89%,观测精度稳定。并作了误差分析,结果类似。月平均比与月平均终端温度有线性相关,这表明观测值有周年季节性变化,这可能与背景辐射,天线增益,大气吸收的季节变化有关。我们从测量和资料分析中得出了阴雨吸收和指向误差,增益漂移等造成的天线温度修正值。并对实测值进行了改正。与TYKW的相应爆发比对,大爆发无遗漏,个别图形欠完整,记录幅度的均方差平均为±20%,峰值时刻的变幅为±0.15分。南京大学天文系射电观测小组自1979年以来参加了太阳活动第21周的峰年观测,现将1980年至1981年期间的观测资料作一分析。

     
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