PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-14:12:50
G01     115.7          20.3               11.4 +/-    1.95      25.0 +/-    1.95  0.040 / 0.030
G07     89.7           64.5               10.2 +/-    1.07      11.1 +/-    1.07  0.040 / 0.030
G08     43.5           27.8                8.1 +/-    2.28      14.8 +/-    2.28  0.040 / 0.030
G09     175.4          20.9               11.4 +/-    1.23      24.6 +/-    1.23  0.040 / 0.020
G11     101.1          41.3               10.6 +/-    0.66      15.1 +/-    0.66  0.070 / 0.160
G13     315.6          22.5                6.0 +/-    2.07      12.5 +/-    2.07  0.080 / 0.180
G17     202.7          28.3               11.4 +/-    2.11      20.7 +/-    2.11  0.110 / 0.210
G18     90.0           22.2                8.6 +/-    1.69      18.0 +/-    1.69  0.140 / 0.150
G28     299.8          58.7                8.7 +/-    1.05      10.0 +/-    1.05  0.150 / 0.200
G30     352.3          71.3                9.6 +/-    0.53      10.1 +/-    0.53  0.130 / 0.170