PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-04:57:50
G02     199.6          23.5                5.7 +/-    1.11      11.5 +/-    1.11  0.050 / 0.100
G06     174.6          52.2                8.1 +/-    1.21      10.0 +/-    1.21  0.090 / 0.100
G13     227.4          12.5                6.8 +/-    6.99      18.0 +/-    6.99  0.070 / 0.150
G17     22.1           59.6                4.4 +/-    0.46       5.0 +/-    0.46  0.070 / 0.130
G19     328.6          70.9                4.7 +/-    1.02       4.9 +/-    1.02  0.030 / 0.040
G24     310.1          29.4                3.9 +/-    0.98       6.9 +/-    0.98  0.040 / 0.040
G28     89.6           38.6                5.5 +/-    0.37       8.2 +/-    0.37  0.140 / 0.630
G30     156.1          10.8                4.9 +/-    1.46      13.6 +/-    1.46  0.080 / 0.620