PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/26-04:28:00
G10     255.0          30.1               10.0 +/-    1.96      17.5 +/-    1.96  0.130 / 0.570
G13     49.4           27.0                5.2 +/-    2.62       9.7 +/-    2.62  0.160 / 0.520
G15     76.9           56.1                7.7 +/-    0.60       9.1 +/-    0.60  0.040 / 0.080
G16     289.8          15.1                6.7 +/-    2.32      16.6 +/-    2.32  0.040 / 0.070
G20     299.6          66.2                8.0 +/-    1.01       8.7 +/-    1.01  0.100 / 0.140
G21     339.6          63.4                6.9 +/-    0.47       7.6 +/-    0.47  0.100 / 0.140
G26     261.7          13.5                7.8 +/-    2.19      20.1 +/-    2.19  0.030 / 0.030
G29     166.4          44.9                9.6 +/-    0.57      12.9 +/-    0.57  0.030 / 0.040