PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-08:12:30
G03     243.8          68.4                3.2 +/-    0.56       3.5 +/-    0.56  0.050 / 0.040
G09     303.8          19.7                1.1 +/-    2.64       2.4 +/-    2.64  0.070 / 0.040
G14     98.6           16.5                2.5 +/-    1.97       6.1 +/-    1.97  0.050 / 0.060
G16     122.3          58.9                5.8 +/-    0.41       6.7 +/-    0.41  0.050 / 0.070
G22     195.7          56.0                5.0 +/-    0.69       5.9 +/-    0.69  0.140 / 0.260
G23     319.2          49.1                4.2 +/-    0.96       5.3 +/-    0.96  0.150 / 0.260
G26     67.5           50.2                5.9 +/-    0.93       7.5 +/-    0.93  0.040 / 0.040
G31     52.6           18.0                1.9 +/-    2.94       4.4 +/-    2.94  0.030 / 0.040