PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-13:27:40
G01     88.1           32.2                5.9 +/-    0.99       9.9 +/-    0.99  0.020 / 0.020
G07     127.1          43.9                7.7 +/-    0.82      10.6 +/-    0.82  0.030 / 0.020
G11     65.6           38.3                6.4 +/-    0.97       9.6 +/-    0.97  0.040 / 0.050
G13     292.2          36.7                9.0 +/-    2.28      13.8 +/-    2.28  0.040 / 0.050
G17     215.6          56.4               10.5 +/-    1.01      12.3 +/-    1.01  0.080 / 0.080
G18     61.5           23.2                5.7 +/-    0.87      11.6 +/-    0.87  0.090 / 0.100
G19     215.6          25.5                9.3 +/-    2.12      17.9 +/-    2.12  0.080 / 0.110
G28     352.2          61.6                6.2 +/-    0.59       6.9 +/-    0.59  0.090 / 0.090
G30     107.5          76.2                8.0 +/-    0.67       8.2 +/-    0.67  0.080 / 0.150