PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-16:42:50
G03     194.5          33.6               10.9 +/-    1.70      17.7 +/-    1.70  0.120 / 0.110
G07     275.8          28.3               10.4 +/-    1.05      18.8 +/-    1.05  0.130 / 0.130
G08     154.8          14.1               11.1 +/-    1.72      28.3 +/-    1.72  0.030 / 0.030
G09     318.9          47.2               10.4 +/-    0.83      13.6 +/-    0.83  0.020 / 0.030
G16     50.7           51.7                9.5 +/-    0.72      11.7 +/-    0.72  0.170 / 0.370
G22     178.7          16.4               11.2 +/-    2.15      26.9 +/-    2.15  0.150 / 0.340
G23     35.8           80.9                9.9 +/-    1.73      10.0 +/-    1.73  0.090 / 0.050
G26     43.2           22.7                7.9 +/-    2.95      16.3 +/-    2.95  0.080 / 0.080
G27     115.0          25.9                9.4 +/-    1.83      18.0 +/-    1.83  0.050 / 0.040