PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-20:42:50
G01     47.4           23.4                8.7 +/-    1.47      17.6 +/-    1.47  0.040 / 0.050
G06     178.5          25.6               12.3 +/-    1.24      23.7 +/-    1.24  0.050 / 0.040
G11     43.7           12.0                8.3 +/-    2.12      22.3 +/-    2.12  0.320 / 0.290
G13     246.6          29.3               11.5 +/-    1.68      20.5 +/-    1.68  0.230 / 0.430
G15     280.1          15.3                9.6 +/-    2.20      23.6 +/-    2.20  0.060 / 0.080
G17     330.5          77.8               10.9 +/-    0.70      11.1 +/-    0.70  0.070 / 0.090
G19     251.0          62.6               11.9 +/-    0.55      13.3 +/-    0.55  0.110 / 0.210
G24     318.5          11.1               -7.3 +/-   33.89     -20.0 +/-   33.89  0.090 / 0.220
G28     50.6           54.7                9.8 +/-    1.26      11.7 +/-    1.26  0.130 / 0.140
G30     150.5          36.7               12.9 +/-    0.85      19.9 +/-    0.85  0.130 / 0.180