PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-05:43:10
G10     273.1          41.4                9.9 +/-    0.94      14.0 +/-    0.94  0.120 / 0.170
G13     39.8           14.2                4.9 +/-    3.44      12.3 +/-    3.44  0.100 / 0.130
G15     54.1           44.4                6.3 +/-    1.10       8.5 +/-    1.10  0.040 / 0.040
G20     1.9            66.6                6.0 +/-    0.39       6.5 +/-    0.39  0.040 / 0.040
G21     17.3           74.9                7.4 +/-    0.74       7.6 +/-    0.74  0.110 / 0.160
G24     115.4          17.4                6.6 +/-    1.19      15.6 +/-    1.19  0.090 / 0.150
G27     315.6          23.4                6.5 +/-    1.34      13.1 +/-    1.34  0.120 / 0.500
G29     168.7          25.9                6.4 +/-    1.19      12.3 +/-    1.19  0.140 / 0.260
G32     204.8          15.8                8.9 +/-    1.59      21.7 +/-    1.59  0.030 / 0.040