PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-08:27:50
G01     57.1           28.8                3.6 +/-    1.24       6.4 +/-    1.24  0.030 / 0.040
G06     178.5          16.5                1.2 +/-    1.88       3.0 +/-    1.88  0.040 / 0.050
G07     142.4          20.3                3.8 +/-    1.18       8.4 +/-    1.18  0.180 / 0.330
G11     48.2           25.3                4.4 +/-    1.36       8.6 +/-    1.36  0.130 / 0.350
G13     259.4          35.8                7.1 +/-    2.16      11.0 +/-    2.16  0.180 / 0.400
G15     291.6          16.6                4.3 +/-    2.27      10.2 +/-    2.27  0.180 / 0.490
G17     260.0          76.7                5.7 +/-    0.58       5.8 +/-    0.58  0.090 / 0.180
G19     233.4          54.2                6.8 +/-    2.52       8.2 +/-    2.52  0.130 / 0.210
G28     24.1           59.8                4.7 +/-    0.76       5.4 +/-    0.76  0.040 / 0.050
G30     145.4          53.9                6.3 +/-    0.51       7.6 +/-    0.51  0.040 / 0.060