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- A Jupiter-mass exoplanet was detected in 2000 by the radial velocity method in which astronomers look for wobbling motion of a star due to the gravitational tug of a planet. 2000年,曾经用径向速度法发现了一颗相当于木星质量的系外行星。在径向速度法中,天文学家们往往寻找恒星摆动的迹象,这种摆动是由于行星的引力作用造成的。
- Velocity refers to speed, turnover, or movement. 周转率指速度、营业额,或者运动。
- In this sense the astrometry and radial velocity planet-hunting methods complement each other, each excelling in the other method's blind spot. 从这一意义上说天体测量和视向速度行星搜索法是互为补充的,各自在彼此方法的盲区表现出色。
- However, if its membership can be confirmed by proper motion and radial velocity determinations, the cause of light variation may not be pulsation. 但是,如果自行或视线速度测定证实为其成员星,那么变光的原因也许不是脉动。
- The simulation test shows this algorithm performs well for the LFM echo of moving target with unknown radial velocity under reverberation background. 仿真测试表明,该算法对于混响噪声背景下径向速度未知动目标的线性调频回波具有良好的检测性能。
- Any reference star that if found to show larger residual in either Right Ascension or Declination will be rejected from the astrometric solution. 任何一个参考星的赤经或赤纬偏差超过这个值将被拒绝进行天文测量处理。
- Astrometric Limit: The maximum residual in the place of a reference star, specified in arc seconds. 天文测量误差极限:参考星位置对应的最大误差,用角秒表示。
- Synchronously, a numerical method is proposed for computing the precise radial velocity of the mover simply but effectively. 同时,提出一种数值计算方法可以简单有效地计算出目标不模糊径向速度。
- But the mismatch between echo and replica caused by moving target's radial velocity will degrade the detecting performance of the matched filter. 根据匹配滤波器输出峰值位置可以获得目标距离的估计,但运动目标径向速度造成的回波和样本失配将导致匹配滤波器检测性能下降。
- Only 9 other red dwarfs are known to have planetary companions, and these were all discovered through the radial velocity technique. 只有其他9个红矮星已知拥有行星伙伴,并且都是通过视向速度技术发现的。
- In Astrometry, the term is applied to the difference between the observed position (or magnitude) of a reference star and the position (or magnitude) listed in the star catalog. 在天文上,本术语指的是观测的参考星的位置(或星等)与星表上的该星的位置(或星等)的差值。
- The new method utilizes both the multi-baseline and multi-frequency to unwrap the radial velocity and performs better than the routine method. 本方法同时利用了参差基线和参差频率的解模糊能力,比常规单参差方法解模糊能力更强。
- Upper Limit: The upper limit for the magnitude of reference stars. 最亮星等极限:参考星的最亮的星等。
- Actual radial velocity distribution, that have been calculated, indicate that the narrower the annulus, the slower the decrease gradient of the velocity at radia... 结果表明,环空间隙越小,其因旋转引起的速度下降沿径向衰减速度越平缓,旋转套管效果越好,证明旋转套管对提高小间隙固井质量意义更大。
- On the basis of airborne SAR/GMTI, an algorithm of spaceborne SAR moving target detection, radial velocity estimation and relocation based on DPCA technique is presented. 在此基础上,给出了一种基于DPCA技术的星载SAR动目标检测、测速及目标定位的实现方法。
- The radial velocity in three kinds of chamber, each with different types of disk-plate disk, grooved disk and bladed disk, were measured by using LDA, respectively. 同时对平板形、沟槽形、叶片形三种不同转盘结构的滤室内流体的径向速度进行了激光测定,结果表明三种转盘形式下径向速度的分布及操作参数对径向速度的影响趋势是相似的;
- The calculation becomes more accurate if more reference stars are used. 利用的定标星越多,计算的精确度就越高。
- Analysis of tracking performance and resource management for pulse doppler phased array radar is done by simulation with incorporating radial velocity into the IMM filtering. 摘要针对脉冲多普勒体制的相控阵雷达,利用交互多模型方法,分析了径向速度对相控阵雷达跟踪性能及雷达资源管理的影响。
- Reference Stars: Star with known position and/or magnitude, that are used to find the plate constants and photometric calibration of an image. 参考星:已知位置和/或星等的恒星,用于确定图片的底片常数和光度校准。