Term 术语 Definition 定义
reduced latitude
归化维度
See LATITUDE: PARAMETRIC.
参见parametric latitude(参量纬度)。
reduction
归算
The process of substituting for an observed value one derived therefrom.
从观测值导出可替代值的过程。
reduction of soundings
水深改正
The CORRECTION of the observed DEPTHS, for the HEIGHT OF TIDE above or below the plane of reference at the TIME of SOUNDING. Usually the ter... more
The CORRECTION of the observed DEPTHS, for the HEIGHT OF TIDE above or below the plane of reference at the TIME of SOUNDING. Usually the term reduction of soundings does not cover CORREC­TIONS other than those due to TIDE. See CORRECTION OF SOUNDINGS, LEAD LINE CORRECTION and TIDE REDUCER.
观测深度的潮汐改正,即加入参考平面上(或下)的潮汐高度改正。一般来说本术语只涉及潮汐改正,不... more
观测深度的潮汐改正,即加入参考平面上(或下)的潮汐高度改正。一般来说本术语只涉及潮汐改正,不涉及其他改正。参见correction of soundings(水深改正)、lead line correction (测深索改正)和tide reducer(潮高改正)。
reduction of tides
潮汐订正
The processing of observed tidal data to obtain mean values of TIDAL CONSTANTS.
对观测到的潮汐数据进行处理,以获得潮汐常数的平均值。
reduction to centre
归心计算
The amount which must be applied to a DIRECTION observed at an ECCENTRIC STATION, or to an ECCENTRIC SIGNAL, to reduce such DIRECTION to wha... more
The amount which must be applied to a DIRECTION observed at an ECCENTRIC STATION, or to an ECCENTRIC SIGNAL, to reduce such DIRECTION to what it would be if there were no such ECCENTRICITY.
加在偏心站观测方向或偏心信号的量,使这些方向经改正后成为无偏心率的量。
reduction to sea level
海平面归算
A reduction applied to a measu­red horizontal length on the EARTH's surface to reduce it to the surface of the SEA LEVEL DATUM.
把地球表面测得的水平长度加一改正数,将其化归到海平面基准面的表面上。
reduction to the meridian
子午订正,中天高度订正
The process of applying a CORRECTION to an ALTITUDE observed when a body is near the CELESTIAL MERIDIAN of the observer, to find the ALTITUD... more
The process of applying a CORRECTION to an ALTITUDE observed when a body is near the CELESTIAL MERIDIAN of the observer, to find the ALTITUDE at MERIDIAN TRANSIT. See ALTITUDE: EX-MERIDI­AN.
当一天体位于观测者天球子午线附近的时候,为获得中天高度而对观测高度进行的改正。参看ex-meridian altit... more
当一天体位于观测者天球子午线附近的时候,为获得中天高度而对观测高度进行的改正。参看ex-meridian altitude(近中天高度)。
reed horn
簧喇叭,舌簧雾笛,雾角
A HORN that produces SOUND by means of a steel reed vibrated by air under pressure.
在空气压力下使钢簧片振动而发声的号笛。
reef
暗礁
A mass of rock or coral which either reaches close to the sea surface or is exposed at low tide, posing a hazard to NAVIGATION.
接近水面或在低潮时露出水面,构成了航行危险的礁石或珊瑚礁。
reef flat
礁坪,浅石滩
A flat expanse of dead reef rock which is partly or entirely dry at LOW TIDE.
低潮时部分或完全露出的大片平坦的危险礁区。
reference direction
基准方向 ,参考方向
A DIRECTION used as a basis for comparison of other DIREC­TIONS.
作为基准用作其他方向比对的方向。
reference ellipsoid
参考椭球
See REFERENCE SPHEROID.
参见reference spheriod(参考椭球体)。
reference level
参考水准面
See DATUM: CHART and DATUM: VERTICAL CONTROL.
参见chart datum(海图基准面)和vertical control datum(高程控制基准)。
reference line
控制线,参考线
Any line which can serve as a refe­rence or base for the measurement of other quantities. Also called datum line.
能够用作参考或基准,测定其他量的任何线,亦称datum line(基准线)。
reference mark
参考标志
In SURVEYING, a supplementary MARK of permanent character close to a STATION or to a BASE TERMINAL, to which it is related by an accurately ... more
In SURVEYING, a supplementary MARK of permanent character close to a STATION or to a BASE TERMINAL, to which it is related by an accurately measured distance and DIRECTION, and/or a difference in ELEVATION.
测量中在靠近测站或基线端点的地方补充设置的永久标识。通过精确的测距、测角和(或)高差测定,以... more
测量中在靠近测站或基线端点的地方补充设置的永久标识。通过精确的测距、测角和(或)高差测定,以确定彼此间的关系位置。
reference object
基准目标
A well-defined object selected as a starting point in the DIRECTION METHOD OF OBSERVATION.
在方向法观测中被明确选定为初始点的物体。
reference plane
参考平面
See DATUM: CHART, and DATUM: VERTICAL CONTROL.
参见chart datum(海图基准)和vertical control datum(垂直控制基准)。
reference point
控制点,参考点
Any point which can serve as a refer­ence or base for the measure­ment of other quantities. Also called datum point.
作为参考或基准测定其他量的任何点。亦称datum point(基准点)。
reference spheroid (or ellipsoid)
参考椭球
A theoretical figure whose dimensions closely approach the dimen­sions of the GEOID. The exact dimensions are deter­mined by various consi... more
A theoretical figure whose dimensions closely approach the dimen­sions of the GEOID. The exact dimensions are deter­mined by various considera­tions of the section of the EARTH's surface considered. The SPHEROIDS of Bessel, Clarke, Delambre, Everest, Hayford, Helbert and others have been adopted as refer­ence spheroids in geodetic work by different countries. Also called spheroid of reference, or ellip­soid of reference. See also SPHER­OID: OBLATE.
尺寸极其接近于大地水准面的一种理论的地球形状,其精确尺寸由所考虑的地球表面的各种因素决定。各... more
尺寸极其接近于大地水准面的一种理论的地球形状,其精确尺寸由所考虑的地球表面的各种因素决定。各国大地测量采用的椭球体有:贝塞尔椭球、克拉克椭球、德兰椭球、艾弗勒斯椭球、海福特椭球和赫尔默特椭球。亦称spheroid of reference(参考椭球体)或ellipsoid of reference(参考椭球体)。亦见oblate spheriod(扁球体)。
reference station
参考(验潮)站,主港
See STATION.
通过观测以确定潮汐和潮流常数,并作为标准与附属站同步观测比较的地点。亦指在潮汐或潮流表中给出... more
通过观测以确定潮汐和潮流常数,并作为标准与附属站同步观测比较的地点。亦指在潮汐或潮流表中给出单独的每日预报资料的地点,根据此表可用差分法或倍乘因子法得到其它点位的相应预报资料。亦称为standard station和standard port(英式术语)。