PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-00:28:00
G07     356.2          64.8                4.9 +/-    0.57       5.3 +/-    0.57  0.050 / 0.090
G08     77.2           52.3                6.7 +/-    1.12       8.2 +/-    1.12  0.050 / 0.090
G09     183.2          59.8                9.6 +/-    1.59      10.9 +/-    1.59  0.060 / 0.140
G11     138.3          21.1                8.9 +/-    1.90      19.0 +/-    1.90  0.050 / 0.130
G23     158.8          27.3                8.3 +/-    1.74      15.4 +/-    1.74  0.030 / 0.040
G27     44.2           22.5                4.2 +/-    1.90       8.7 +/-    1.90  0.030 / 0.040
G28     250.1          40.4                8.7 +/-    1.72      12.5 +/-    1.72  0.030 / 0.040
G30     315.9          47.4                5.1 +/-    0.68       6.7 +/-    0.68  0.030 / 0.050