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               11.5 +/-    1.79      25.0 +/-    1.79  0.040 / 0.040
G07     89.7           64.5               10.8 +/-    0.52      11.8 +/-    0.52  0.040 / 0.040
G08     43.5           27.8                7.9 +/-    1.11      14.5 +/-    1.11  0.110 / 0.160
G09     175.4          20.9               12.0 +/-    1.32      25.8 +/-    1.32  0.110 / 0.130
G11     101.1          41.3               12.5 +/-    0.52      17.8 +/-    0.52  0.040 / 0.080
G13     315.6          22.5                5.8 +/-    1.52      12.0 +/-    1.52  0.040 / 0.090
G17     202.7          28.3               11.2 +/-    1.56      20.3 +/-    1.56  0.030 / 0.050
G18     90.0           22.2                9.2 +/-    1.26      19.2 +/-    1.26  0.030 / 0.050
G28     299.8          58.7                8.2 +/-    0.60       9.4 +/-    0.60  0.050 / 0.060
G30     352.3          71.3                9.5 +/-    1.05       9.9 +/-    1.05  0.040 / 0.070