PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-10:27:50
G01     62.7           30.8                3.6 +/-    1.20       6.2 +/-    1.20  0.090 / 0.150
G07     140.0          24.1                3.3 +/-    0.80       6.5 +/-    0.80  0.090 / 0.140
G11     50.4           28.4                2.1 +/-    2.64       3.8 +/-    2.64  0.030 / 0.030
G13     265.7          37.4                5.7 +/-    2.71       8.6 +/-    2.71  0.030 / 0.030
G15     297.9          15.7                2.7 +/-    1.90       6.6 +/-    1.90  0.100 / 0.090
G17     241.9          71.7                6.1 +/-    0.46       6.4 +/-    0.46  0.130 / 0.150
G18     44.1           14.8                2.6 +/-    1.88       6.5 +/-    1.88  0.100 / 0.200
G19     228.1          49.3                5.9 +/-    2.66       7.5 +/-    2.66  0.100 / 0.250
G28     15.8           60.5                4.6 +/-    2.17       5.2 +/-    2.17  0.030 / 0.030
G30     141.4          57.9                5.9 +/-    0.66       6.9 +/-    0.66  0.030 / 0.030