PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-18:27:50
G02     88.6           10.8                8.8 +/-    2.72      24.1 +/-    2.72  0.130 / 0.190
G05     45.5           27.7                7.0 +/-    0.92      12.9 +/-    0.92  0.110 / 0.190
G13     88.2           34.5               10.4 +/-    0.86      16.7 +/-    0.86  0.060 / 0.090
G15     138.6          44.5               11.5 +/-    1.02      15.6 +/-    1.02  0.050 / 0.090
G20     239.8          29.8                9.0 +/-    2.82      15.9 +/-    2.82  0.080 / 0.140
G21     303.4          39.4                8.8 +/-    0.93      12.9 +/-    0.93  0.080 / 0.120
G25     205.6          20.4                9.2 +/-    2.55      20.1 +/-    2.55  0.040 / 0.050
G26     298.2          19.7                9.5 +/-    1.86      21.1 +/-    1.86  0.040 / 0.060
G29     124.2          84.8               11.0 +/-    1.14      11.0 +/-    1.14  0.040 / 0.090