PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-20:12:30
G02     62.7           31.2                5.1 +/-    1.47       8.7 +/-    1.47  0.030 / 0.040
G05     52.2           56.8                8.4 +/-    0.61       9.8 +/-    0.61  0.030 / 0.030
G12     180.6          23.6               12.3 +/-    1.38      24.9 +/-    1.38  0.240 / 0.280
G13     123.5          18.9               10.3 +/-    2.03      23.3 +/-    2.03  0.120 / 0.390
G15     163.6          14.9               11.1 +/-    2.04      27.7 +/-    2.04  0.120 / 0.120
G21     275.3          19.6                9.7 +/-    2.46      21.6 +/-    2.46  0.070 / 0.100
G25     228.1          47.6                9.3 +/-    3.57      12.1 +/-    3.57  0.090 / 0.130
G29     330.7          58.5                7.8 +/-    0.66       9.0 +/-    0.66  0.070 / 0.180