PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-09:57:40
G01     122.4          15.4                4.8 +/-    1.28      11.7 +/-    1.28  0.040 / 0.030
G07     71.5           67.8                5.6 +/-    0.45       6.0 +/-    0.45  0.030 / 0.030
G08     46.1           33.2                3.7 +/-    1.84       6.1 +/-    1.84  0.200 / 0.280
G09     174.4          26.0                4.8 +/-    1.78       9.1 +/-    1.78  0.180 / 0.250
G11     110.2          38.5                7.1 +/-    0.76      10.6 +/-    0.76  0.180 / 0.250
G13     319.2          16.7                3.6 +/-    1.92       8.5 +/-    1.92  0.120 / 0.350
G17     200.3          21.9                4.3 +/-    1.97       9.1 +/-    1.97  0.030 / 0.030
G18     96.9           19.2                5.7 +/-    1.12      12.8 +/-    1.12  0.030 / 0.020
G28     284.6          55.2                4.6 +/-    2.14       5.5 +/-    2.14  0.110 / 0.210
G30     337.8          64.3                4.6 +/-    0.73       5.0 +/-    0.73  0.110 / 0.210