PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-00:42:50
G02     199.5          20.8               11.5 +/-    1.42      24.7 +/-    1.42  0.050 / 0.040
G06     172.2          51.8               11.7 +/-    1.34      14.4 +/-    1.34  0.040 / 0.040
G13     228.8          14.1               10.7 +/-    3.29      27.1 +/-    3.29  0.040 / 0.080
G17     14.1           63.6                7.2 +/-    1.17       7.9 +/-    1.17  0.040 / 0.090
G19     316.5          71.2                7.1 +/-    0.53       7.5 +/-    0.53  0.070 / 0.180
G24     311.3          28.2                7.8 +/-    1.17      14.1 +/-    1.17  0.070 / 0.170
G28     86.7           40.2                8.6 +/-    1.29      12.5 +/-    1.29  0.030 / 0.040
G30     156.2          13.8               12.7 +/-    1.09      32.5 +/-    1.09  0.030 / 0.040