PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-00:42:50
G01     94.7           30.7                7.8 +/-    1.17      13.4 +/-    1.17  0.040 / 0.040
G07     121.6          49.2                8.5 +/-    0.40      10.9 +/-    0.40  0.030 / 0.040
G08     42.2           12.9                4.5 +/-    3.67      11.7 +/-    3.67  0.060 / 0.080
G11     76.8           42.6                6.9 +/-    1.44       9.6 +/-    1.44  0.080 / 0.080
G13     299.6          34.0                5.1 +/-    1.94       8.3 +/-    1.94  0.120 / 0.220
G17     212.3          47.9                8.7 +/-    0.86      11.3 +/-    0.86  0.300 / 0.290
G19     212.9          23.8                9.3 +/-    2.45      18.7 +/-    2.45  0.040 / 0.050
G28     342.7          61.9                5.7 +/-    0.66       6.4 +/-    0.66  0.040 / 0.040
G30     98.9           74.6                8.5 +/-    0.53       8.7 +/-    0.53  0.030 / 0.040