Term 术语 Definition 定义
horizon: sensible
可见地平
That circle of the CELESTIAL SPHERE formed by the inter­section of the CELESTIAL SPHERE and a plane through any point, such as the eye of a... more
That circle of the CELESTIAL SPHERE formed by the inter­section of the CELESTIAL SPHERE and a plane through any point, such as the eye of an observer, and perpen­dicular to the zenith-nadir line.
过任一点(如观测者的眼睛),并垂直于天顶/天底线的平面与天球相截而形成的大圈。
horizon: true
真地平
In PHOTOGRAM­METRY, a horizontal plane passing through a point of vision or PERSPECTIVE CENTRE. The APPARENT HORIZON ap­proximates the tru... more
In PHOTOGRAM­METRY, a horizontal plane passing through a point of vision or PERSPECTIVE CENTRE. The APPARENT HORIZON ap­proximates the true horizon only when the point of vision is very close to SEA LEVEL.
在摄影测量学中,过视点或透视中心的地平面。当视点非常接近海平面时,视地平与真地平近似。
horizon: visible (or local)
NULL
See HORIZON: APPARENT.
NULL
horizon glass
地平镜,水平镜,定镜
That glass of a MARINE SEXTANT, atta­ched to the frame, through which the HORIZON is observed. That half of this glass nearer the frame is ... more
That glass of a MARINE SEXTANT, atta­ched to the frame, through which the HORIZON is observed. That half of this glass nearer the frame is silvered to form the HORIZON MIRROR for reflecting the IMAGE of a CELESTIAL BODY; the other half is clear.
安装在航海六分仪框架上的玻璃镜子,通过它可观测到地平。靠近框架的一半镀银,成为反射天体影像的... more
安装在航海六分仪框架上的玻璃镜子,通过它可观测到地平。靠近框架的一半镀银,成为反射天体影像的地平镜;另一半是透明的。
horizon line
地平线
See HORIZON TRACE.
参见horizon trace(地平迹线)。
horizon mirror
地平镜 反射镜面
The mirror part of the HORIZON GLASS. The expression is sometimes used somewhat loosely to refer to the HORIZON GLASS.
地平镜的反射镜面部分。不太严格时用来指地平镜。
horizon photograph
地平像片,地平摄影
In AERIAL PHOTOGRAPHY, a PHOTO­GRAPH of the HORIZON, taken simultaneously with a VERTICAL PHOTOGRAPH and used to determine the RELATIVE TIL... more
In AERIAL PHOTOGRAPHY, a PHOTO­GRAPH of the HORIZON, taken simultaneously with a VERTICAL PHOTOGRAPH and used to determine the RELATIVE TILT between adjacent VERTICAL PHOTOGRAPHS.
在航空摄影测量中,在垂直摄影的同时进行的地平摄影,用来测定相邻垂直像片的相对倾斜。
horizon shade
调色镜
One of the pivoted coloured glasses which can be swung before the HORIZON GLASS of a SEXTANT to regulate the intensity of light.
在六分仪地平镜前能转动的调整光强度的有色玻璃镜组中的一个。
horizon system of coordinates
地平坐标系
A set of CELESTIAL COORDINATES based on the CELESTIAL HORIZON as the PRIMARY GREAT CIRCLE; usually ALTITUDE and AZIMUTH or AZIMUTH ANGLE.
以天文地平面作为基准大圆的天球坐标系;通常为地平纬度和方位或者方位角。
horizontal
水平的
(adj). Parallel to the plane of the HORIZON; perpendicular to the DIRECTION OF GRAVITY.
(形容词)。平行于水平面的;垂直于重力方向。
horizontal axis
水平轴
See AXIS.
在经纬仪或子午仪中,仪器望远镜垂直旋转的轴。也称为trunnion axis 或transit axis。
horizontal circle
水平度盘
See CIRCLE.
在某一测量仪器中,用于测量水平角的刻度盘。
horizontal control
平面控制
See CONTROL.
在平面位置中确定的控制。该平面控制可能适用于任何认可的地理或者平面坐标系统。
horizontal control datum
平面控制基准
The position on the SPHEROID OF REFERENCE assigned to the HORIZONTAL CONTROL (TRI­AN­GULATION and TRAVERSE) of an area and defined by (1) ... more
The position on the SPHEROID OF REFERENCE assigned to the HORIZONTAL CONTROL (TRI­AN­GULATION and TRAVERSE) of an area and defined by (1) the POSITION (LATITUDE and LONGITUDE) of one selected STATION in the area, and (2) the AZIMUTH from the selected STATION to an adjoining STATION. See also DATUM: GEODETIC.
指一个区域平面控制测量(三角测量和导线测量)中位于参考椭球体的位置点,该位置由下列元素确定:... more
指一个区域平面控制测量(三角测量和导线测量)中位于参考椭球体的位置点,该位置由下列元素确定:(1)区域内一个选用站的位置(经度和纬度)(2)从选用站到邻站的方位角。亦可参见geodetic datum(大地基准面)。
horizontal coplane
像对共面
See COPLANE: BASAL.
参见basal coplane(像对共面)。
horizontal dilution of precision (HDOP)
平面误差放大因子、水平精度因子
See DILUTION OF PRECISION.
(HDOP)。参见dilution of precision(误差放大因子)。
horizontal force instrument
水平力仪
See VIBRATING NEEDLE.
参见vibrating needle(摆动磁针仪)。
horizontal intensity of the earth's magnetic field
地球磁场水平强度
The strength of the horizontal component of the EAR­TH'S MAGNETIC FIELD.
地球磁场水平分量的强度。
horizontal parallax
水平视差
See PARALLAX.
在天文学中,指在观测者地平线上某一天体的地心视差。在摄影测量学中指绝对立体视差。
horizontal photograph
水平像片
See PHOTOGRAPH.
照相机光轴水平时拍摄的像片。