PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-13:42:40
G01     82.0           32.4                3.7 +/-    1.11       6.2 +/-    1.11  0.040 / 0.080
G07     130.5          36.7                6.0 +/-    0.62       9.2 +/-    0.62  0.040 / 0.070
G11     61.9           37.8                5.4 +/-    1.22       8.2 +/-    1.22  0.030 / 0.050
G13     286.5          38.5                1.3 +/-    1.09       1.9 +/-    1.09  0.060 / 0.050
G15     311.0          12.3                4.0 +/-    1.19      10.6 +/-    1.19  0.040 / 0.040
G17     218.5          55.9                7.5 +/-    0.91       8.9 +/-    0.91  0.040 / 0.050
G18     57.0           22.0              -16.7 +/-   15.55     -35.0 +/-   15.55  0.140 / 0.090
G19     216.6          33.9                6.9 +/-    1.38      11.2 +/-    1.38  0.130 / 0.110
G28     347.1          61.6                4.2 +/-    0.67       4.7 +/-    0.67  0.160 / 1.680
G30     121.1          70.5                6.4 +/-    0.75       6.7 +/-    0.75  0.150 / 1.520