PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-18:58:00
G01     98.3           28.9               13.8 +/-    1.06      24.8 +/-    1.06  0.030 / 0.020
G07     119.5          45.4               15.0 +/-    0.49      20.0 +/-    0.49  0.030 / 0.020
G08     41.6           13.4                9.5 +/-    2.69      24.7 +/-    2.69  0.040 / 0.050
G11     76.5           42.1               13.2 +/-    1.07      18.6 +/-    1.07  0.030 / 0.050
G13     302.2          33.8               11.8 +/-    1.50      19.2 +/-    1.50  0.040 / 0.050
G17     208.6          46.1               15.9 +/-    0.79      21.1 +/-    0.79  0.050 / 0.050
G18     69.7           24.0               12.2 +/-    1.20      24.3 +/-    1.20  0.100 / 0.140
G19     210.8          20.4               14.0 +/-    7.09      30.5 +/-    7.09  0.090 / 0.130
G28     323.8          60.8               12.0 +/-    0.83      13.6 +/-    0.83  0.060 / 0.150
G30     77.1           78.6               13.9 +/-    0.95      14.2 +/-    0.95  0.060 / 0.130