PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-22:12:30
G02     213.0          57.0               12.8 +/-    0.68      14.9 +/-    0.68  0.090 / 0.210
G06     77.4           79.2               11.2 +/-    0.69      11.4 +/-    0.69  0.080 / 0.260
G12     316.1          30.1                9.6 +/-    1.10      16.9 +/-    1.10  0.070 / 0.060
G17     54.0           34.5               10.6 +/-    0.83      16.9 +/-    0.83  0.060 / 0.060
G19     35.1           51.2               10.4 +/-    1.74      12.9 +/-    1.74  0.130 / 0.100
G24     269.3          42.3               12.3 +/-    2.05      17.3 +/-    2.05  0.080 / 0.100
G28     118.5          20.6               11.3 +/-    1.40      24.5 +/-    1.40  0.040 / 0.020