Term 术语 Definition 定义
raster data presentation
栅格数据表达
Method of digitally repre­sen­ting data of an image by a matrix-like scheme of PIXELs.
用矩阵式的像素集对图片进行数字化表达的方法。
rate
频率
In ELECTRONIC NAVIGA­TION, the designation of PULSE REPETITION RATE for a pair of transmitting sta­tions, their SIGNALS, and the resulting... more
In ELECTRONIC NAVIGA­TION, the designation of PULSE REPETITION RATE for a pair of transmitting sta­tions, their SIGNALS, and the resulting LINES OF POSI­TION.
在无线电导航中,为一对无线电发射台及其信号和所产生的位置线指定的脉冲重复速率。
rate station
主控台
See DRIFT STATION.
参见drift station(漂流站)。
rational horizon
天球地平圈
See HORIZON: CELESTIAL.
参见celestial horizon(天球地平圈)。
ratio of ranges
潮差比
The ratio of the HEIGHT OF TIDE at the SUBORDINATE STATION to the HEIGHT OF TIDE at the REFE­RENCE STATION.
验潮副港与主港潮高的比率。
ratio of rise
潮升比
The ratio of the HEIGHT OF TIDE at two places.
两地点潮高的比率。
ratio print
缩放晒印
See PRINT.
用投影晒印的方法根据负片或透明软片变换比例的晒印。
ravine
深谷,峡谷
In general, any steep-sided VALLEY.
泛指陡峭的山谷。
ray
射线
A BEAM of RADIANT ENERGY of infinitesimal cross-section, such as a LIGHT RAY.
横断面无限小的辐射能波束,如光线。
Rayleigh criterion
瑞利准则
Used in tidal analysis. Only those harmonic constituents which are separated by at least a complete period from their neighbouring constitue... more
Used in tidal analysis. Only those harmonic constituents which are separated by at least a complete period from their neighbouring constituents over the length of data available should be included in the harmonic analysis of a given time series.
一种用于潮汐分析的标准。指在潮汐测量期间只有那些在可用数据长度上与相邻分潮至少相隔一个完整周... more
一种用于潮汐分析的标准。指在潮汐测量期间只有那些在可用数据长度上与相邻分潮至少相隔一个完整周期的调和分潮才能应用于给定时间序列的调和分析中。
reach
河口段,直水道;岬湾
A straight section of a RIVER, especially a navigable RIVER between two bends. See also SEA REACH. An ARM OF THE SEA extending into the LAND... more
A straight section of a RIVER, especially a navigable RIVER between two bends. See also SEA REACH. An ARM OF THE SEA extending into the LAND.
江河的直流地段,特别是两弯曲处之间的可航水道。亦见sea reach(通海直水道)。 海洋伸入陆地的海湾。
real image
实像
See IMAGE.
真实产生并能显示在表面上的影像。如同在照相机中的一样。
rear light
后灯
See LIGHT(S): RANGE.
参见range light(叠标灯)。
rear nodal point
后节点
See NODAL POINT.
参见nodal point(节点)。
receiver
接收机
One who or that which receives anything, particularly a RADIO RECEI­VER.
接收某种事物的人或器械,特指无线电接收机。
recession of a shoreline
海岸线退化,海退
Landward movement of the SHORELINE. Also called retrogression of a beach.
海岸线向陆地方向移动。亦称retrogression of a beach(海滩后移)。
reciprocal bearing
反方位角
See BEARING.
与已知方位相差180°的方位。
reciprocal levelling
往返水准测量
See LEVELLING.
在测线两端点对向观测垂直角以消去误差的三角高程测量。
reckoning
船位推算
In NAVIGATION, computation by which the POSITION of a ship is found. See DEAD RECKONING.
在航行中通过计算求得船位,参见dead reckoning(船位推算)。
recommended course
推荐航线
See TRACK: RECOMMENDED.
参见recommended track(推荐航线)。