PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-17:28:00
G07     356.4          65.0               11.4 +/-    0.62      12.5 +/-    0.62  0.030 / 0.060
G08     78.4           53.2               12.9 +/-    0.47      15.7 +/-    0.47  0.040 / 0.050
G09     182.0          58.5               14.3 +/-    1.72      16.4 +/-    1.72  0.080 / 0.070
G11     137.3          22.0               14.6 +/-    1.11      30.6 +/-    1.11  0.070 / 0.060
G23     157.4          22.6               14.8 +/-    1.88      30.7 +/-    1.88  0.070 / 0.210
G27     44.1           22.6               10.0 +/-    1.85      20.8 +/-    1.85  0.060 / 0.180
G28     250.4          40.4               14.2 +/-    0.82      20.4 +/-    0.82  0.090 / 0.190
G30     314.4          45.8               11.2 +/-    1.17      14.9 +/-    1.17  0.070 / 0.250