PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-14:27:50
G01     64.0           31.3                7.5 +/-    1.12      12.9 +/-    1.12  0.090 / 0.150
G07     139.6          22.9                7.4 +/-    2.82      15.3 +/-    2.82  0.110 / 0.140
G11     50.2           27.7                6.3 +/-    2.05      11.5 +/-    2.05  0.030 / 0.040
G13     266.8          37.5                7.3 +/-    2.27      11.0 +/-    2.27  0.030 / 0.040
G15     297.9          16.0                7.2 +/-    2.39      17.6 +/-    2.39  0.050 / 0.050
G17     239.7          70.2                9.2 +/-    0.46       9.7 +/-    0.46  0.040 / 0.050
G18     44.4           15.0                5.3 +/-    1.38      13.2 +/-    1.38  0.120 / 0.130
G19     227.5          48.1                8.5 +/-    2.46      11.0 +/-    2.46  0.090 / 0.100
G28     16.7           60.3                8.3 +/-    1.88       9.4 +/-    1.88  0.120 / 0.270
G30     140.3          55.7                9.9 +/-    0.61      11.7 +/-    0.61  0.100 / 0.280