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テキスト


GpsSatellite

版本:Android 3.2 r1

结构

继承关系

public final classGpsSatelliteextendsObject

java.lang.Object

android.location.GpsSatellite

类概述

此类用于描述当前GPS卫星状态。和GpsStatus联合使用。

公共方法

public floatgetAzimuth()

返回卫星的方位角,方位角范围0360度。

返回值

卫星的方位角

public floatgetElevation()

返回卫星的高度角,高度角范围090

返回值

卫星的高度角

public intgetPrn()

返回伪随机噪声码,

(译者注:所谓伪噪声码,不是卫星编号,是一个具有一定周期的取值01的离散符号串,它具有类似于白噪声的自相关函数

返回值

伪随机噪声码

public floatgetSnr()

返回卫星的信噪比。

(译者注:即放大器的输出信号的电压与同时输出的噪声电压的比,常常用分贝数表示。设备的信噪比越高表明它产生的杂音越少。一般来说,信噪比越大,说明混在信号里的噪声越小,声音回放的音质量越高,否则相反)

返回值

卫星信噪比

public booleanhasAlmanac()

如果GPS引擎有近似轨道信息则返回true

返回值

如果GPS引擎有近似轨道信息则返回true

public booleanhasEphemeris()

如果GPS引擎有卫星星历则返回true

(译者注:卫星星历用于描述太空飞行体位置和速度的表达式)

返回值

如果GPS引擎有卫星星历则返回true

public booleanuseInfix()

当卫星被GPS引擎用于计算最近位置时,返回true

返回值

当卫星被GPS引擎用于计算最近位置时,返回true

补充

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