PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-10:42:50
G01     57.4           29.0                4.5 +/-    1.16       8.1 +/-    1.16  0.120 / 0.240
G07     142.3          19.4                3.3 +/-    2.02       7.3 +/-    2.02  0.110 / 0.230
G11     47.9           24.4                5.4 +/-    1.63      10.6 +/-    1.63  0.030 / 0.030
G13     259.5          35.7                6.9 +/-    2.07      10.8 +/-    2.07  0.030 / 0.030
G15     293.2          16.0                2.7 +/-    1.20       6.5 +/-    1.20  0.070 / 0.090
G17     256.6          75.3                6.7 +/-    0.51       6.9 +/-    0.51  0.130 / 0.050
G18     40.9           11.7                4.1 +/-    2.76      11.0 +/-    2.76  0.170 / 0.450
G19     233.3          53.9                5.9 +/-    2.44       7.1 +/-    2.44  0.140 / 0.350
G28     25.2           59.6                6.1 +/-    1.07       6.9 +/-    1.07  0.040 / 0.050
G30     145.1          52.7                6.9 +/-    0.57       8.5 +/-    0.57  0.050 / 0.060