PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-17:57:40
G01     244.9          31.9                9.1 +/-    2.15      15.4 +/-    2.15  0.040 / 0.040
G03     313.7          52.5               10.1 +/-    1.61      12.3 +/-    1.61  0.030 / 0.040
G14     65.4           38.5                7.9 +/-    1.79      11.8 +/-    1.79  0.070 / 0.050
G16     160.8          23.4               12.4 +/-    2.02      25.2 +/-    2.02  0.030 / 0.040
G22     292.1          72.4                9.6 +/-    0.60      10.0 +/-    0.60  0.070 / 0.120
G23     291.7          24.1               11.2 +/-    3.04      22.3 +/-    3.04  0.050 / 0.120
G26     129.7          42.9               12.3 +/-    1.28      17.2 +/-    1.28  0.080 / 0.220
G31     40.4           51.9                9.0 +/-    1.85      11.1 +/-    1.85  0.090 / 0.180
G32     82.6           18.7               11.2 +/-    2.00      25.5 +/-    2.00  0.040 / 0.050