Term 术语 Definition 定义
index mirror
六分仪动镜
The MIRROR attached to the INDEX ARM of a MARINE SEXTANT. Also called index glass.
附属在航海六分仪指臂上的反射镜。也可称为index glass。
index of refraction
折射率
See REFRACTION: INDEX OF.
入射角的正弦值和折射角正弦值的比率。
index shade
遮光镜
On a SEXTANT, one of the pivoting colou­red glasses which can be swung before the INDEX MIRROR for reducing the glare of the SUN.
六分仪上的在枢轴上旋转的有色镜的一种,其能绕轴心在六分仪动镜前旋转,以减少强烈太阳光的强度。
Indian spring low water
印度平均大潮低潮面
An arbitrary TIDAL DATUM approximating the LEVEL of the mean of the LOWER LOW WATER at SPRING TIDES. It was first used in waters surrounding... more
An arbitrary TIDAL DATUM approximating the LEVEL of the mean of the LOWER LOW WATER at SPRING TIDES. It was first used in waters surrounding India. Also called Indian tide plane.
一种独立的潮汐基准面,在朔望大潮时,近似于低低潮的平均海水面。它首先应用于印度周围的水域,也... more
一种独立的潮汐基准面,在朔望大潮时,近似于低低潮的平均海水面。它首先应用于印度周围的水域,也称之为Indian tide plane(印度潮面)。
Indian tide plane
印度潮汐基准面
See INDIAN SPRING LOW WATER.
见indian spring low water(印度平均大潮低潮面)。
indicator
指示器,显示器
That part of electronic equipment in which the DATA obtained by the RECEIVER is presented for visual OBSERVATION. This is usually in the for... more
That part of electronic equipment in which the DATA obtained by the RECEIVER is presented for visual OBSERVATION. This is usually in the form of a SCOPE or DIAL.
电子设备的一部分,它能使接收机获取的数据以可视形式显示出来。通常以显示器或刻度盘形式。
indirect levelling
间接水准测量
See LEVELLING.
使用下列方法测定高程差:(a)三角高程测量中用根据垂直角和水平距离;(b)气压高程测量用气压计测... more
使用下列方法测定高程差:(a)三角高程测量中用根据垂直角和水平距离;(b)气压高程测量用气压计测定大气压力而推导出相对高程;(c)用沸点测高计测量水的沸点获得高程,如沸点高程测量。
indirect wave
间接波
See WAVE.
由于折射或者反射造成传播方向发生急剧变化,而由间接路径传播的任意一种波。参见sky wave(天波)。
induced magnetism
感生磁性
See MAGNETISM.
一块磁性材料在磁场中获得的磁力。
inequality
不等,均差
A systematic departure from the mean value of a quantity. See ANNUAL INEQUALITY, DIURNAL INE­QUALITY, LUNAR INEQUALITY, PARALLAX INEQUALITY... more
A systematic departure from the mean value of a quantity. See ANNUAL INEQUALITY, DIURNAL INE­QUALITY, LUNAR INEQUALITY, PARALLAX INEQUALITY, PHASE INEQUALITY.
相对于某一量平均值的系统性偏离。参见annual inequality(周年不等)、diurnal inequality(日潮不等)、lunar ine... more
相对于某一量平均值的系统性偏离。参见annual inequality(周年不等)、diurnal inequality(日潮不等)、lunar inequality(月行差)、parallax inequality(视差不等)、phase inequality(月相不等)。
inertia: gyroscopic
陀螺惯性,回转惯性
See GYROSCOPIC INERTIA.
阻止任何外力改变其转动轴的陀螺特性。陀螺倾向于保持它的转动轴方向不变。
inertial navigation
惯性导航
See NAVIGATION.
由某一设备自动完成的船位推测,该设备自离开起始点即通过计算加速度的二重积分给出连续的船位。
inferior conjunction
下合
See CONJUNCTION.
当内行星处于地球和太阳之间(成一条直线)时,内行星和太阳的合。
inferior mirage
下现蜃景
See MIRAGE.
海市蜃楼的异常情况,由于暴晒的酷热,发生在延展水域、陆地、海岸和道路等处的上空,物体虚像出现... more
海市蜃楼的异常情况,由于暴晒的酷热,发生在延展水域、陆地、海岸和道路等处的上空,物体虚像出现在现实物体之下。这种位于或稍高于正常“地平线”的物体变成不易被视线所见的蜃景情况,一般把它叫做下现蜃景。
inferior planet (s)
内行星
See PLANET (S): INFERIOR.
其轨道小于地球轨道的行星(在地球轨道之内):水星和金星。
inferior transit
下中天
See MERIDIAN TRANSIT.
参见meridian transit(中天)。
infrared
红外线的
(adj.). Having a FREQUENCY immediately beyond the red end of the visible SPECTRUM said of RAYS of longer WAVE LENGTH than visible light, but... more
(adj.). Having a FREQUENCY immediately beyond the red end of the visible SPECTRUM said of RAYS of longer WAVE LENGTH than visible light, but shorter than RADIO WAVES.
(形容词)。其频率紧临可见光谱红光边缘外侧的射线,也就是说它的波长比可见光要长,但比无线电波... more
(形容词)。其频率紧临可见光谱红光边缘外侧的射线,也就是说它的波长比可见光要长,但比无线电波要短。
infrasonic
亚声的,次声的
(adj.). Having a FREQUENCY below the audible RANGE.
(形容词)。其频率低于可听音域频率的。
ingoing stream
进潮流,涨潮流
See FLOOD STREAM.
参见flood stream(涨潮流)。
initial great circle course
初始大圆航向
See COURSE: GREAT CIRCLE.
参见great circle course(大圆航向)。