PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-18:57:50
G01     221.5          12.1               11.8 +/-    2.02      31.5 +/-    2.02  0.030 / 0.040
G03     256.9          71.3               11.7 +/-    0.88      12.2 +/-    0.88  0.040 / 0.040
G09     298.0          11.1               -5.8 +/-   32.19     -15.8 +/-   32.19  0.080 / 0.050
G14     92.3           21.1               11.2 +/-    2.81      24.0 +/-    2.81  0.050 / 0.050
G16     140.8          51.7               15.7 +/-    0.74      19.3 +/-    0.74  0.150 / 0.090
G22     200.6          63.6               13.1 +/-    0.76      14.5 +/-    0.76  0.200 / 0.150
G23     313.6          43.6               11.7 +/-    1.06      16.2 +/-    1.06  0.170 / 0.320
G26     83.3           54.1               12.6 +/-    0.92      15.1 +/-    0.92  0.180 / 0.310
G31     48.3           25.8                9.7 +/-    2.99      18.5 +/-    2.99  0.090 / 0.080