PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-10:12:50
G01     77.6           32.4                4.3 +/-    1.58       7.1 +/-    1.58  0.040 / 0.080
G07     132.6          35.5                5.4 +/-    0.85       8.5 +/-    0.85  0.040 / 0.080
G11     59.7           37.0                4.2 +/-    1.10       6.5 +/-    1.10  0.060 / 0.060
G13     282.2          38.9                5.0 +/-    5.38       7.5 +/-    5.38  0.070 / 0.050
G15     309.1          12.9                2.6 +/-    1.65       6.8 +/-    1.65  0.080 / 0.090
G17     221.5          60.0                5.1 +/-    1.58       5.8 +/-    1.58  0.090 / 0.130
G18     54.2           21.1                4.3 +/-    2.79       9.2 +/-    2.79  0.080 / 0.210
G19     218.3          37.5                5.2 +/-    1.19       7.9 +/-    1.19  0.100 / 0.220
G28     351.3          61.6                4.0 +/-    0.93       4.5 +/-    0.93  0.040 / 0.050
G30     126.1          70.2                5.4 +/-    0.78       5.7 +/-    0.78  0.060 / 0.060