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문자


GpsSatellite

版本:Android 3.2 r1

结构

继承关系

public final class GpsSatellite extends Object

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 float getAzimuth ()

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 float getElevation ()

返回卫星的高度角,高度角范围090

返回值

卫星的高度角

public int getPrn ()

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 float getSnr ()

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 boolean hasAlmanac ()

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 boolean hasEphemeris ()

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 boolean useInfix ()

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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[百度百科]GPS

[百度百科]GPS定位技术


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