PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-20:57:50
G10     293.5          50.6               10.0 +/-    2.57      12.5 +/-    2.57  0.040 / 0.030
G15     47.5           35.1                9.5 +/-    0.92      15.0 +/-    0.92  0.040 / 0.030
G20     345.5          65.4               10.4 +/-    0.50      11.3 +/-    0.50  0.060 / 0.080
G21     87.1           75.3               11.0 +/-    0.43      11.3 +/-    0.43  0.060 / 0.090
G24     97.5           25.2               11.8 +/-    1.01      23.0 +/-    1.01  0.080 / 0.140
G27     304.5          32.1                9.1 +/-    1.71      15.2 +/-    1.71  0.080 / 0.130
G29     168.3          10.4               11.2 +/-    1.27      31.0 +/-    1.27  0.060 / 0.070
G32     209.2          30.1               11.6 +/-    1.45      20.3 +/-    1.45  0.050 / 0.080