PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-13:12:30
G07     4.2            66.5                6.1 +/-    0.47       6.6 +/-    0.47  0.070 / 0.060
G08     69.3           50.1                5.5 +/-    0.71       7.0 +/-    0.71  0.070 / 0.060
G09     179.0          53.3                7.2 +/-    1.57       8.8 +/-    1.57  0.080 / 0.130
G11     133.5          24.6                7.3 +/-    2.64      14.3 +/-    2.64  0.070 / 0.140
G23     159.1          22.7                7.1 +/-    1.30      14.7 +/-    1.30  0.080 / 0.260
G27     42.6           20.7                5.7 +/-    1.56      12.3 +/-    1.56  0.100 / 0.210
G28     253.5          42.3                8.0 +/-    0.78      11.2 +/-    0.78  0.030 / 0.030
G30     315.6          46.5                5.1 +/-    0.86       6.7 +/-    0.86  0.030 / 0.040