PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-10:42:50
G01     61.4           30.4                2.9 +/-    0.42       5.0 +/-    0.42  0.040 / 0.060
G07     140.6          22.8                4.9 +/-    1.45      10.1 +/-    1.45  0.040 / 0.050
G11     49.7           27.3                1.8 +/-    0.70       3.2 +/-    0.70  0.070 / 0.150
G13     264.2          37.1                5.9 +/-    1.57       9.0 +/-    1.57  0.070 / 0.170
G15     296.9          15.8                2.9 +/-    2.26       7.0 +/-    2.26  0.030 / 0.040
G17     244.9          72.6                5.5 +/-    0.97       5.7 +/-    0.97  0.030 / 0.040
G18     43.2           14.1                1.0 +/-    1.50       2.6 +/-    1.50  0.080 / 0.130
G19     229.3          50.5                6.5 +/-    0.47       8.1 +/-    0.47  0.060 / 0.120
G28     18.3           60.3                4.2 +/-    0.50       4.7 +/-    0.50  0.050 / 0.060
G30     142.4          56.5                5.2 +/-    1.19       6.1 +/-    1.19  0.050 / 0.060