PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-17:12:30
G03     223.4          66.6               11.1 +/-    0.95      12.0 +/-    0.95  0.120 / 0.280
G09     303.8          18.1               11.0 +/-    1.36      25.3 +/-    1.36  0.200 / 0.260
G14     100.0          15.7               10.1 +/-    2.05      24.8 +/-    2.05  0.040 / 0.050
G16     123.6          60.1               13.7 +/-    0.46      15.6 +/-    0.46  0.050 / 0.050
G22     190.5          52.2               11.8 +/-    0.47      14.5 +/-    0.47  0.030 / 0.040
G23     322.5          52.4               11.2 +/-    0.43      13.8 +/-    0.43  0.030 / 0.030
G31     53.2           17.5                7.1 +/-    3.53      16.6 +/-    3.53  0.330 / 0.140