有谁装过GPS追踪器，用的是谁家的电话卡？？？耗多少流量？？？？？？。？？？？

jimmy9046 · 发表于 2014-7-12 00:18:49

Chatsw 发表于 2014-7-11 23:20
同问，保险能便宜多少？
＋1

白雲山民 · 发表于 2014-7-12 00:20:10

daddy's carLittle Johnny watched his daddy's car pass by the school playground and go
into the woods. Curious, he followed the car and saw Daddy and Aunt Jane
in a passionate embrace.Little Johnny found this so exciting that he could hardly contain himself
as he ran home and started to tell his mother. "Mommy, I was at the
playground and I saw Daddy's car go into the woods with Aunt Jane. I went
back to look and he was giving Aunt Jane a big kiss, and then he helped
her take off her shirt. Then Aunt Jane helped Daddy take his pants off,
then Aunt Jane..."At this point Mommy cut him off and said, "Johnny, this is such an
interesting story, suppose you save the rest of it for supper time. I want
to see the look on Daddy's face when you tell it tonight."At the dinner table that evening, Mommy asked little Johnny to tell his
story. Johnny started his story, "I was at the playground and I saw
Daddy's car go into the woods with Aunt Jane. I went back to look and he
was giving Aunt Jane a big

白雲山民 · 发表于 2014-7-12 00:39:00

training 发表于 2014-7-12 00:04
保险能便宜多少？
我家报警器用的是aldi的卡多少刀一年？

richsea · 发表于 2014-7-12 01:47:39

GPS追踪器不是用的GPS信号？

richsea · 发表于 2014-7-12 01:15:18

不过这个东西很管用到是真的，我遇到的真实案例早上仓库的院子里停了一辆巨大的拖车上面有个挖掘机，过了一会车主就找来了，要我们帮忙查看一下院子里的camera，车子是前一天晚上半夜被人偷了，开到我们院子了。早上发现没车，车主GPS定位到车子找来了。警察拿走了开车人的影响，后事不知怎么结果。猜测可能是一伙小贼打算当天晚上弄我们某个仓库的闸门，事先把车弄过去没想到车子上有GPS定位。算是白忙活了一场

白雲山民 · 发表于 2014-7-13 15:25:14

richsea 发表于 2014-7-13 16:13
GPS追踪器不是用的GPS信号？
http://baike.baidu.com/link?url= ... b_oe9t6XTGH9Jo-vvQK2工作原理
编辑GPS定位系统工作原理是由地面主控站收集各监测站的观测资料和气象信息,计算各卫星的星历表及卫星钟改正数,按规定的格式编辑导航电文,通过地面上的注入站向GPS卫星注入这些信息。测量定位时,用户可以利用接收机的储存星历得到各个卫星的粗略位置。根据这些数据和自身位置,由计算机选择卫星与用户联线之间张角较大的四颗卫星作为观测对象。观测时,接收机利用码发生器生成的信息与卫星接收的信号进行相关处理,并根据导航电文的时间标和子帧计数测量用户和卫星之间的伪距。将修正后的伪距及输入的初始数据及四颗卫星的观测值列出3个观测方程式,即可解出接收机的位置,并转换所需要的坐标系统,以达到定位目的。简单来说GPS定位系统是靠你的车载终端中内置一张手机卡，通过手机信号传输到后台，来实现定位，GPS终端就是这个后台，可以帮你实现一键导航、后台服务、等各种人性服务。
3功能介绍
编辑车辆跟踪功能利用GPS和电子地图可以实时显示出车辆的实际位置，并可任意放大、缩小、还原、换图；可以随目标移动，使目标始终保持在屏幕上；还可实现多窗口、多车辆、多屏幕同时跟踪。利用该功能可对重要车辆和货物进行跟踪运输。

richsea · 发表于 2014-7-13 16:44:31

白雲山民发表于 2014-7-13 16:23
http://baike.baidu.com/link?url=b4V9o3c9gu3rp_5Fh25WdkZH50bcm0UGY9J1uk7fj748L6JGVBUlCAgy79VjfWprmz ...
明白了，这个是因为GPS本身单向传输的缺陷造成的，据说北斗是双向的，但是北斗现在还很不成熟