PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-10:27:40
G02     79.4           15.6                3.6 +/-    1.29       8.9 +/-    1.29  0.030 / 0.040
G05     44.7           38.0                2.7 +/-    0.94       4.0 +/-    0.94  0.060 / 0.050
G12     180.8          10.8                3.5 +/-    2.37       9.7 +/-    2.37  0.110 / 0.290
G13     107.8          30.1                7.9 +/-    0.97      13.8 +/-    0.97  0.090 / 0.360
G15     148.3          32.6                5.9 +/-    1.46       9.8 +/-    1.46  0.040 / 0.040
G20     245.0          79.7                4.3 +/-    0.48       4.4 +/-    0.48  0.040 / 0.030
G21     292.3          34.0                3.5 +/-    1.07       5.6 +/-    1.07  0.070 / 0.090
G25     214.0          32.2                6.2 +/-    1.76      10.5 +/-    1.76  0.100 / 0.120
G26     312.0          15.6                2.0 +/-    2.42       4.9 +/-    2.42  0.110 / 0.120
G29     356.6          80.6                2.9 +/-    0.42       3.0 +/-    0.42  0.080 / 0.100