PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-20:57:40
G10     264.2          36.7               13.8 +/-    1.15      21.2 +/-    1.15  0.140 / 0.400
G13     43.1           20.1               10.3 +/-    1.44      22.7 +/-    1.44  0.130 / 0.300
G15     67.5           55.4               12.6 +/-    0.51      14.9 +/-    0.51  0.040 / 0.040
G16     280.9          13.1               11.1 +/-    1.69      28.8 +/-    1.69  0.050 / 0.040
G20     292.5          59.1               13.0 +/-    0.89      14.9 +/-    0.89  0.120 / 0.340
G21     356.9          70.1               13.2 +/-    0.33      14.0 +/-    0.33  0.120 / 0.380
G24     120.2          13.0               15.9 +/-    1.79      41.5 +/-    1.79  0.120 / 0.350
G27     320.2          15.8                9.8 +/-    1.46      24.0 +/-    1.46  0.140 / 0.340
G29     167.7          34.6               14.7 +/-    1.53      23.6 +/-    1.53  0.080 / 0.270