PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-18:12:30
G07     352.6          64.0               11.2 +/-    0.79      12.3 +/-    0.79  0.040 / 0.040
G08     82.7           53.9               12.3 +/-    1.47      14.9 +/-    1.47  0.040 / 0.050
G09     183.0          60.8               13.3 +/-    0.46      15.0 +/-    0.46  0.120 / 0.160
G11     138.9          20.6               15.2 +/-    2.69      33.0 +/-    2.69  0.070 / 0.180
G23     157.1          24.5               12.1 +/-    2.50      23.9 +/-    2.50  0.040 / 0.030
G27     45.2           23.8                9.6 +/-    2.23      19.3 +/-    2.23  0.050 / 0.040
G28     248.5          39.2               12.7 +/-    0.78      18.7 +/-    0.78  0.080 / 0.070
G30     313.1          44.8               10.4 +/-    0.78      14.1 +/-    0.78  0.080 / 0.060