Ntrip协议访问千寻位置服务     DATE: 2019-12-05 17:30

Ntrip报文协议
Ntrip协议获取千寻位置差分数据步骤:
 
1.Ntrip Client使用TCP方式连接Ntrip Caster(Ntrip Caster当前即指千寻位置服务)
①地址
域名:rtk.ntrip.qxwz.com 或 IP:60.205.8.49 (尽量使用域名,IP会经常变动)
②端口
端口:8001 对应ITRF2008坐标系
端口:8002 对应WGS84
端口:8003 对应CGCS2000
 
2.Ntrip Client获取源列表,发送以下数据给Ntrip Caster
 
GET / HTTP/1.0
User-Agent: NTRIP GNSSInternetRadio/1.4.10
Accept: */*
Connection: close
 
成功,NtripCaster返回源列表
 
SOURCETABLE 200 OK
Server: POP_GW_Ntrip_1.0_1514199594/1.0 
Via: n5_129
Date: 2017/12/26 09:29:58
Content-Type: text/plain; charset=UTF-8
Content-Length: 390
Connection: close
 
STR;RTCM30_GG;RTCM30_GG;RTCM3X;1005(10),1004-1012(1),1033(10);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP
STR;RTCM23_GPS;RTCM23_GPS;RTCM2X;1(1),31(1),41(1),3(10),32(30);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP
STR;RTCM32_GGB;RTCM32_GGB;RTCM3X;1005(10),1074-1084-1124(1);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP
ENDSOURCETABLE
3.Ntrip Client获取差分数据
//千寻差分账号和差分密码
qxngy005:103e7be 转成Base64编码:cXhuZ3kwMDU6MTAzZTdiZQ==
qxngy004:c57d9a6 转成Base64编码:cXhuZ3kwMDQ6YzU3ZDlhNg==
qxngy007:a0d9758 转成Base64编码:cXhuZ3kwMDc6YTBkOTc1OA==
 
Ntrip Client获取差分数据,我们选择挂载点RTCM30_GG,填入上面算出的差分账号和差分密码的base64编码,组包发送以下数据,
 
GET /RTCM30_GG HTTP/1.0
User-Agent: NTRIP GNSSInternetRadio/1.4.10
Accept: */*
Connection: close
Authorization: Basic cXhuZ3kwMDU6MTAzZTdiZQ==
返回
 
ICY 200 OK
 
4.然后Ntrip Client发送$GPGGA,052114.93,3115.2739300,N,12133.8922600,E,1,00,1.0,-10.643,M,11.353,M,0.0,*5D
到Ntrip Caster,Ntrip Caster会以1HZ的频率返回数据到Ntrip Client
以为只能是GPGGA,GNGGA也可以,不用转换成GPGGA
$GNGGA,031202.00,3109.91846,N,12123.97022,E,1,03,18.63,-0.7,M,9.7,M,,*6F
$GNGGA,031200.00,3109.91893,N,12123.97023,E,1,03,18.54,-0.6,M,9.7,M,,*61
$GNGGA,031159.00,3109.91931,N,12123.97035,E,1,03,18.49,-0.6,M,9.7,M,,*6C
 
相关资料链接:
 
Ntrip通讯协议:
https://blog.csdn.net/hanford/article/details/53025771
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原文链接:https://blog.csdn.net/working24hours/article/details/88323465