PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/11-07:42:50
G01     227.3          19.3                5.0 +/-    1.42      11.1 +/-    1.42  0.030 / 0.040
G03     293.7          66.9                3.8 +/-    0.77       4.0 +/-    0.77  0.030 / 0.040
G14     83.0           26.6                1.8 +/-    1.99       3.4 +/-    1.99  0.040 / 0.030
G16     149.1          41.2                4.3 +/-    0.92       6.1 +/-    0.92  0.040 / 0.040
G22     225.3          72.6                3.3 +/-    0.47       3.4 +/-    0.47  0.130 / 0.220
G23     307.3          38.8                2.2 +/-    1.11       3.2 +/-    1.11  0.240 / 0.420
G26     103.9          53.4                3.8 +/-    0.36       4.6 +/-    0.36  0.090 / 0.170
G31     44.7           33.6                1.6 +/-    0.89       2.6 +/-    0.89  0.090 / 0.180