PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-14:13:10
G01     62.7           30.9                7.4 +/-    0.65      12.8 +/-    0.65  0.150 / 0.120
G07     140.1          22.1                7.2 +/-    1.67      15.1 +/-    1.67  0.070 / 0.120
G11     49.6           26.9                5.0 +/-    1.51       9.4 +/-    1.51  0.030 / 0.030
G13     265.4          37.2                7.3 +/-    1.76      11.2 +/-    1.76  0.030 / 0.040
G15     296.9          16.1                5.6 +/-    1.21      13.5 +/-    1.21  0.040 / 0.050
G17     242.0          70.9                8.2 +/-    0.35       8.6 +/-    0.35  0.040 / 0.060
G19     228.5          49.1                8.9 +/-    2.92      11.3 +/-    2.92  0.100 / 0.120
G28     18.6           60.1                8.1 +/-    1.15       9.2 +/-    1.15  0.120 / 0.110
G30     141.2          54.8                7.5 +/-    0.42       8.9 +/-    0.42  0.090 / 0.320