PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-14:42:50
G02     219.9          58.8                6.9 +/-    1.51       7.9 +/-    1.51  0.060 / 0.050
G06     50.3           70.3                6.0 +/-    0.48       6.3 +/-    0.48  0.050 / 0.040
G12     320.5          42.5                6.1 +/-    0.89       8.6 +/-    0.89  0.030 / 0.020
G17     60.9           29.0                6.1 +/-    1.99      11.0 +/-    1.99  0.030 / 0.030
G19     37.7           50.7                6.3 +/-    2.01       7.9 +/-    2.01  0.070 / 0.080
G24     257.7          41.0                7.1 +/-    3.97      10.2 +/-    3.97  0.060 / 0.080
G28     124.5          11.9                6.7 +/-    2.54      17.9 +/-    2.54  0.050 / 0.040