题目
英语翻译
The hardware interface for GPS units is designed to meet the NMEA requirements.They are also compatible with most computer serial ports using RS232 protocols,however strictly speaking the NMEA standard is not RS232.They recommend conformance to EIA-422.The interface speed can be adjusted on some models but the NMEA standard is 4800 b/s (bit per second rate) with 8 bits of data,no parity,and one stop bit.All units that support NMEA should support this speed.Note that,at a b/s rate of 4800,you can easily send enough data to more than fill a full second of time.For this reason some units only send updates every two seconds or may send some data every second while reserving other data to be sent less often.In addition some units may send data a couple of seconds old while other units may send data that is collected within the second it is sent.Generally time is sent in some field within each second so it is pretty easy to figure out what a particular gps is doing.Some sentences may be sent only during a particular action of the receiver such as while following a route while other receivers may always send the sentence and just null out the values.Other difference will be noted in the specific data descriptions defined later in the text.NMEA consists of sentences,the first word of which,called a data type,defines the interpretation of the rest of the sentence.Each Data type would have its own unique interpretation and is defined in the NMEA standard.The GGA sentence (shown below) shows an example that provides essential fix data.Other sentences may repeat some of the same information but will also supply new data.Whatever device or program that reads the data can watch for the data sentence that it is interested in and simply ignore other sentences that is doesn't care about.In the NMEA standard there are no commands to indicate that the gps should do something different.Instead each receiver just sends all of the data and expects much of it to be ignored.Some receivers have commands inside the unit that can select a subset of all the sentences or,in some cases,even the individual sentences to send.There is no way to indicate anything back to the unit as to whether the sentence is being read correctly or to request a re-send of some data you didn't get.Instead the receiving unit just checks the checksum and ignores the data if the checksum is bad figuring the data will be sent again sometime later.
The hardware interface for GPS units is designed to meet the NMEA requirements.They are also compatible with most computer serial ports using RS232 protocols,however strictly speaking the NMEA standard is not RS232.They recommend conformance to EIA-422.The interface speed can be adjusted on some models but the NMEA standard is 4800 b/s (bit per second rate) with 8 bits of data,no parity,and one stop bit.All units that support NMEA should support this speed.Note that,at a b/s rate of 4800,you can easily send enough data to more than fill a full second of time.For this reason some units only send updates every two seconds or may send some data every second while reserving other data to be sent less often.In addition some units may send data a couple of seconds old while other units may send data that is collected within the second it is sent.Generally time is sent in some field within each second so it is pretty easy to figure out what a particular gps is doing.Some sentences may be sent only during a particular action of the receiver such as while following a route while other receivers may always send the sentence and just null out the values.Other difference will be noted in the specific data descriptions defined later in the text.NMEA consists of sentences,the first word of which,called a data type,defines the interpretation of the rest of the sentence.Each Data type would have its own unique interpretation and is defined in the NMEA standard.The GGA sentence (shown below) shows an example that provides essential fix data.Other sentences may repeat some of the same information but will also supply new data.Whatever device or program that reads the data can watch for the data sentence that it is interested in and simply ignore other sentences that is doesn't care about.In the NMEA standard there are no commands to indicate that the gps should do something different.Instead each receiver just sends all of the data and expects much of it to be ignored.Some receivers have commands inside the unit that can select a subset of all the sentences or,in some cases,even the individual sentences to send.There is no way to indicate anything back to the unit as to whether the sentence is being read correctly or to request a re-send of some data you didn't get.Instead the receiving unit just checks the checksum and ignores the data if the checksum is bad figuring the data will be sent again sometime later.
提问时间:2021-05-06
答案
不是说没人会译,估计是文章太长分又不多...-_-
(包括我在内,对不起了~)
楼主把文章分段,再试下这个网址.
有英文基础的根据译文改改就好.
(包括我在内,对不起了~)
楼主把文章分段,再试下这个网址.
有英文基础的根据译文改改就好.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
- 1for ,because of ,now that表示原因的时候的用法
- 2跑道长400米,甲骑自行车,每分钟骑490米,乙跑,每分钟跑250米,2人从同一处出发,经几分钟2人首次相遇
- 3一道应用题,不过是英文滴,
- 4根尖分生区细胞中与能量转换有关的细胞器为何没有叶绿体?速度,马上采纳
- 5(黄河颂)诗中赞美黄河磅礴气势的诗句是
- 6ABCD乘以9等于DCBA,且ABCD不是同一个数字.问ABCD这个四为数是多少
- 7英语翻译
- 8等腰梯形的上底、下底和腰长分别为4cm、10cm和6cm,则等腰梯形的下底角为_度.
- 9如图,AB⊥CD,垂足为B,EF是经过B点的一条直线,已知∠EBD=145°,则∠CBE,∠ABF的度数分别为( ) A.55°,35° B.35°,55° C.45°,45° D.25°,55°
- 10曲作为 姓氏 到底怎么读?
热门考点
- 1一个数的2倍加上这个数的3倍=4.5,这个数是()
- 2下列属于纯净物的是,属于混合物的是 蒸馏水 天然水 水蒸气 冰水混合物 矿泉水 二氧化碳 氧气 纯净的空气 铁 豆浆 碳酸饮料
- 31又25分之9减50分之48等于多少?像这样的带分数减真分数怎么做?
- 4植物蒸腾作用是指.
- 5英语谓语非谓语填空
- 6No body like such class改为反意疑问句是什么呢?
- 7请问一下f(x 3) f(X 4)include
- 8某高速公路全长340千米,其中平原路段占百分之三十五,山区路段占百分之六十五,在山区路段中,隧道长度占五分之一,平原路段长多少千米?山区路段长多少千米?隧道长多少千米?
- 9体循环与肺循环的心输出量为什么相同呢?
- 10人类经济活动对荒漠化形成的影响,正确的是