PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-13:42:40
G02     231.2          70.0                4.7 +/-    0.96       5.0 +/-    0.96  0.090 / 0.080
G05     175.0          10.9               -4.3 +/-   18.92     -11.7 +/-   18.92  0.070 / 0.090
G06     42.1           61.8                4.7 +/-    0.68       5.3 +/-    0.68  0.050 / 0.110
G12     321.1          48.1                4.3 +/-    0.36       5.5 +/-    0.36  0.060 / 0.120
G17     65.7           26.6                4.0 +/-    1.15       7.5 +/-    1.15  0.060 / 0.060
G19     53.5           39.7                4.6 +/-    1.18       6.7 +/-    1.18  0.060 / 0.060
G24     251.7          36.9                6.9 +/-    2.06      10.6 +/-    2.06  0.030 / 0.040
G28     128.4          10.9                5.6 +/-    3.43      15.3 +/-    3.43  0.040 / 0.030