PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-08:12:40
G01     66.6           31.5                3.5 +/-    0.83       6.0 +/-    0.83  0.030 / 0.040
G07     138.1          28.3                5.0 +/-    1.03       9.1 +/-    1.03  0.030 / 0.040
G11     53.1           31.9                2.7 +/-    0.97       4.6 +/-    0.97  0.050 / 0.100
G13     270.4          38.4                8.1 +/-    0.77      12.1 +/-    0.77  0.050 / 0.090
G15     299.9          16.0                2.1 +/-    1.61       5.2 +/-    1.61  0.060 / 0.110
G17     234.6          69.9                6.6 +/-    0.66       6.9 +/-    0.66  0.060 / 0.110
G19     224.7          46.1                6.0 +/-    0.78       7.9 +/-    0.78  0.080 / 0.150
G28     7.4            61.1                2.2 +/-    0.52       2.4 +/-    0.52  0.090 / 0.130
G30     138.1          62.9                8.0 +/-    0.72       8.9 +/-    0.72  0.040 / 0.060