PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-13:58:00
G01     104.3          26.9                9.5 +/-    1.16      17.7 +/-    1.16  0.020 / 0.020
G07     110.9          56.2               10.4 +/-    0.53      12.2 +/-    0.53  0.030 / 0.020
G08     41.6           17.3                8.0 +/-    2.45      18.8 +/-    2.45  0.040 / 0.040
G11     84.3           42.5               11.4 +/-    0.78      15.9 +/-    0.78  0.030 / 0.030
G13     307.3          30.4                8.6 +/-    0.97      14.9 +/-    0.97  0.060 / 0.130
G17     206.9          40.8               10.9 +/-    1.08      15.6 +/-    1.08  0.090 / 0.140
G18     77.1           24.5               10.2 +/-    1.40      20.2 +/-    1.40  0.070 / 0.090
G19     210.3          12.8               -0.5 +/-    7.66      -1.4 +/-    7.66  0.060 / 0.100
G28     323.0          61.3                7.9 +/-    0.83       8.8 +/-    0.83  0.060 / 0.140
G30     31.1           79.2                9.2 +/-    0.78       9.3 +/-    0.78  0.050 / 0.110