PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-21:57:40
G01     39.4           13.6                8.4 +/-    0.95      21.7 +/-    0.95  0.070 / 0.280
G02     199.2          12.5               20.0 +/-    2.57      52.9 +/-    2.57  0.080 / 0.300
G06     173.5          43.8               16.7 +/-    0.97      22.8 +/-    0.97  0.070 / 0.130
G13     234.7          19.5               17.4 +/-    1.69      38.8 +/-    1.69  0.070 / 0.130
G15     267.6          10.9               12.7 +/-    2.73      34.6 +/-    2.73  0.080 / 0.160
G17     359.1          69.8               12.9 +/-    0.75      13.7 +/-    0.75  0.090 / 0.170
G19     286.8          69.8               12.6 +/-    0.82      13.4 +/-    0.82  0.040 / 0.070
G24     315.1          22.4                7.9 +/-    0.89      16.4 +/-    0.89  0.040 / 0.060
G28     76.9           44.7               11.9 +/-    0.62      16.1 +/-    0.62  0.110 / 0.380
G30     155.2          22.6               15.4 +/-    2.55      31.8 +/-    2.55  0.090 / 0.370