PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-11:12:30
G07     346.5          62.4                4.8 +/-    0.40       5.3 +/-    0.40  0.040 / 0.040
G08     96.8           53.3                6.1 +/-    0.51       7.4 +/-    0.51  0.040 / 0.050
G09     188.0          70.2                6.2 +/-    0.46       6.6 +/-    0.46  0.090 / 0.060
G11     143.1          16.6                5.8 +/-    2.57      14.0 +/-    2.57  0.130 / 0.070
G23     155.2          33.2                4.9 +/-    1.17       8.1 +/-    1.17  0.150 / 0.200
G27     52.1           30.0                4.7 +/-    1.38       8.2 +/-    1.38  0.130 / 0.290
G28     238.5          27.0                4.4 +/-    2.23       8.2 +/-    2.23  0.030 / 0.030
G30     305.9          39.0                3.9 +/-    1.81       5.8 +/-    1.81  0.040 / 0.030