【O文件介绍】

  介绍RINEX格式的观测值文件，文件头如下

     3.00           OBSERVATION DATA    M (MIXED)           RINEX VERSION / TYPE
Bnx2Rnx             igs                 20170102 00:06:26UTCPGM / RUN BY / DATE
Source 083720170101000000.bnx                               COMMENT
AIRA                                                        MARKER NAME
21742S001                                                   MARKER NUMBER
IGS_group           GSI                                     OBSERVER / AGENCY
5134K78052          TRIMBLE NETR9       4.61                REC # / TYPE / VERS
4938353451          TRM59800.00     SCIS                    ANT # / TYPE
 -3530185.4900  4118797.3400  3344036.9300                  APPROX POSITION XYZ
        0.0000        0.0000        0.0000                  ANTENNA: DELTA H/E/N
G   16 C1C L1C D1C S1C C2X L2X D2X S2X C2W L2W D2W S2W C5X  SYS / # / OBS TYPES
       L5X D5X S5X                                          SYS / # / OBS TYPES
R   20 C1C L1C D1C S1C C2C L2C D2C S2C C1P L1P D1P S1P C2P  SYS / # / OBS TYPES
       L2P D2P S2P C3X L3X D3X S3X                          SYS / # / OBS TYPES
E   16 C1X L1X D1X S1X C5X L5X D5X S5X C7X L7X D7X S7X C8X  SYS / # / OBS TYPES
       L8X D8X S8X                                          SYS / # / OBS TYPES
S    8 C1C L1C D1C S1C C5I L5I D5I S5I                      SYS / # / OBS TYPES
C   12 C2I L2I D2I S2I C6I L6I D6I S6I C7I L7I D7I S7I      SYS / # / OBS TYPES
J   24 C1C L1C D1C S1C C1X L1X D1X S1X C1Z L1Z D1Z S1Z C2X  SYS / # / OBS TYPES
       L2X D2X S2X C6L L6L D6L S6L C5X L5X D5X S5X          SYS / # / OBS TYPES
Carrier-to-Noise ratios in [dB-Hz]                          COMMENT
All observations are referred to receiver time              COMMENT
QZS-1 L1-SAIF obs stored with obs-code C1Z                  COMMENT
  2017     1     1     0     0    0.0000000                 TIME OF FIRST OBS
                                                            END OF HEADER
                                                            END OF HEADER

第一行分别为：RINEX格式版本号3.00；文件类型 观测值文件；观测数据类型M(混合系统，G为GPS；R为GLONASS；T为NNSS子午卫星）。

     3.00           OBSERVATION DATA    M (MIXED)           RINEX VERSION / TYPE

第二行分别为：创建本数据文件所采用的程序；创建本数据文件的单位名字；创建本数据文件的日期。

Bnx2Rnx             igs                 20170102 00:06:26UTCPGM / RUN BY / DATE

第三行分别为：注释

Source 083720170101000000.bnx                               COMMENT

第四、五行分别为：天线标志点名，天线标志编号。

AIRA                                                        MARKER NAME
21742S001                                                   MARKER NUMBER

第六行分别为：

IGS_group           GSI                                     OBSERVER / AGENCY

第七行分别为：

5134K78052          TRIMBLE NETR9       4.61                REC # / TYPE / VERS

第八行分别为：

4938353451          TRM59800.00     SCIS                    ANT # / TYPE

第九、十行分别为：测站标志近似位置；天线高；天线相位中心对于测站标志在东和北向上的偏移量。

-3530185.4900  4118797.3400  3344036.9300                  APPROX POSITION XYZ
        0.0000        0.0000        0.0000                  ANTENNA: DELTA H/E/N

第十一到二十行：观测值类型和不同观测值类型数量以及存储顺序。

G:GPS;

R:GLONASS;

E:Galileo

S:SBAS

C:BeiDou

J:QZSS

I:IRNSS

G   16 C1C L1C D1C S1C C2X L2X D2X S2X C2W L2W D2W S2W C5X  SYS / # / OBS TYPES
       L5X D5X S5X                                          SYS / # / OBS TYPES
R   20 C1C L1C D1C S1C C2C L2C D2C S2C C1P L1P D1P S1P C2P  SYS / # / OBS TYPES
       L2P D2P S2P C3X L3X D3X S3X                          SYS / # / OBS TYPES
E   16 C1X L1X D1X S1X C5X L5X D5X S5X C7X L7X D7X S7X C8X  SYS / # / OBS TYPES
       L8X D8X S8X                                          SYS / # / OBS TYPES
S    8 C1C L1C D1C S1C C5I L5I D5I S5I                      SYS / # / OBS TYPES
C   12 C2I L2I D2I S2I C6I L6I D6I S6I C7I L7I D7I S7I      SYS / # / OBS TYPES
J   24 C1C L1C D1C S1C C1X L1X D1X S1X C1Z L1Z D1Z S1Z C2X  SYS / # / OBS TYPES
       L2X D2X S2X C6L L6L D6L S6L C5X L5X D5X S5X          SYS / # / OBS TYPES

第二十一到二十三行为：注释行

Carrier-to-Noise ratios in [dB-Hz]                          COMMENT
All observations are referred to receiver time              COMMENT
QZS-1 L1-SAIF obs stored with obs-code C1Z                  COMMENT

第二十四到二十五行为：第一个观测记录时刻

  2017     1     1     0     0    0.0000000                 TIME OF FIRST OBS
                                                            END OF HEADER