PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-14:43:10
G02     200.9          14.1                9.3 +/-    2.50      23.6 +/-    2.50  0.090 / 0.140
G06     169.6          51.1               11.0 +/-    0.86      13.6 +/-    0.86  0.110 / 0.170
G13     230.0          15.8                6.9 +/-    3.19      16.8 +/-    3.19  0.080 / 0.150
G17     19.2           62.0                8.2 +/-    0.54       9.1 +/-    0.54  0.080 / 0.160
G19     297.0          69.7                8.3 +/-    1.24       8.8 +/-    1.24  0.070 / 0.320
G24     311.7          28.1                6.1 +/-    1.76      11.1 +/-    1.76  0.090 / 0.270
G28     82.9           42.2                7.6 +/-    0.68      10.6 +/-    0.68  0.040 / 0.070
G30     157.2          20.1                9.1 +/-    1.74      19.9 +/-    1.74  0.040 / 0.060