PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-19:12:50
G01     68.9           32.7               13.2 +/-    1.02      21.8 +/-    1.02  0.090 / 0.340
G07     138.4          30.0               14.3 +/-    1.43      25.1 +/-    1.43  0.110 / 0.410
G11     53.1           30.2               11.8 +/-    1.02      20.5 +/-    1.02  0.040 / 0.040
G13     272.6          37.3               15.1 +/-    1.15      22.9 +/-    1.15  0.030 / 0.040
G15     301.8          15.2                9.4 +/-    2.68      23.1 +/-    2.68  0.070 / 0.100
G17     235.1          67.5               15.5 +/-    0.76      16.6 +/-    0.76  0.070 / 0.140
G18     48.0           17.6                9.3 +/-    0.46      21.8 +/-    0.46  0.070 / 0.150
G19     225.4          41.8               16.8 +/-    1.48      23.8 +/-    1.48  0.070 / 0.160
G28     22.7           58.8               13.1 +/-    0.36      15.0 +/-    0.36  0.040 / 0.060
G30     137.1          59.6               15.8 +/-    0.91      18.0 +/-    0.91  0.030 / 0.050