PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-08:12:30
G10     248.6          24.7                4.6 +/-    1.62       9.1 +/-    1.62  0.180 / 0.520
G13     56.2           31.6                4.7 +/-    0.84       8.0 +/-    0.84  0.120 / 0.600
G15     89.1           57.1                5.7 +/-    0.67       6.7 +/-    0.67  0.040 / 0.060
G16     298.3          15.3                2.9 +/-    1.97       7.1 +/-    1.97  0.050 / 0.050
G20     18.8           66.3                2.8 +/-    0.47       3.1 +/-    0.47  0.090 / 0.130
G21     331.9          59.2                3.0 +/-    0.73       3.5 +/-    0.73  0.130 / 0.110
G26     269.3          16.5                7.7 +/-    1.16      18.4 +/-    1.16  0.050 / 0.050
G29     164.0          52.1                7.2 +/-    1.37       8.9 +/-    1.37  0.050 / 0.050