PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-17:58:10
G07     358.7          65.4                9.2 +/-    0.67      10.0 +/-    0.67  0.030 / 0.050
G08     77.1           53.2               10.9 +/-    0.88      13.2 +/-    0.88  0.030 / 0.050
G09     181.9          57.4               14.1 +/-    0.92      16.4 +/-    0.92  0.070 / 0.150
G11     136.7          22.7               12.7 +/-    1.12      26.1 +/-    1.12  0.070 / 0.150
G23     157.5          21.3               13.1 +/-    2.49      27.8 +/-    2.49  0.040 / 0.040
G27     43.5           21.8                8.1 +/-    0.94      17.1 +/-    0.94  0.050 / 0.040
G28     251.6          41.2               13.0 +/-    1.14      18.6 +/-    1.14  0.080 / 0.210
G30     315.5          46.7                8.8 +/-    1.01      11.6 +/-    1.01  0.080 / 0.230