PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-14:27:50
G01     61.9           30.7                7.6 +/-    0.76      13.2 +/-    0.76  0.100 / 0.130
G07     140.5          21.2                7.2 +/-    1.40      15.4 +/-    1.40  0.080 / 0.120
G11     49.2           26.3                6.1 +/-    2.20      11.5 +/-    2.20  0.030 / 0.040
G13     264.4          37.0                8.6 +/-    1.64      13.1 +/-    1.64  0.030 / 0.030
G15     296.1          16.2                6.5 +/-    1.40      15.8 +/-    1.40  0.060 / 0.050
G17     244.0          71.7                9.3 +/-    0.90       9.8 +/-    0.90  0.050 / 0.040
G18     43.1           13.9                5.5 +/-    2.34      14.0 +/-    2.34  0.110 / 0.130
G19     229.3          49.8                9.8 +/-    2.64      12.4 +/-    2.64  0.110 / 0.120
G28     20.2           60.0                8.4 +/-    1.16       9.6 +/-    1.16  0.100 / 0.140
G30     141.8          53.9                8.6 +/-    0.72      10.4 +/-    0.72  0.260 / 0.180