PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-21:28:00
G10     249.9          27.7               13.2 +/-    0.69      24.2 +/-    0.69  0.190 / 0.570
G13     53.7           29.2                8.0 +/-    0.92      14.2 +/-    0.92  0.140 / 0.720
G15     88.6           57.9               10.8 +/-    0.37      12.5 +/-    0.37  0.060 / 0.130
G16     296.5          15.7               10.2 +/-    3.84      24.9 +/-    3.84  0.080 / 0.120
G20     269.3          50.5               10.0 +/-    0.89      12.5 +/-    0.89  0.040 / 0.070
G21     332.3          58.8                9.7 +/-    0.72      11.1 +/-    0.72  0.040 / 0.080
G26     269.0          15.8               12.3 +/-    2.74      30.1 +/-    2.74  0.060 / 0.150
G29     163.2          51.1               10.9 +/-    0.57      13.6 +/-    0.57  0.070 / 0.180