PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-18:42:40
G03     225.9          66.8                8.6 +/-    0.44       9.3 +/-    0.44  0.040 / 0.050
G09     303.7          18.0                8.8 +/-    1.33      20.4 +/-    1.33  0.050 / 0.050
G14     100.3          15.1               11.4 +/-    2.87      28.2 +/-    2.87  0.100 / 0.280
G16     125.3          60.0               12.6 +/-    0.65      14.3 +/-    0.65  0.120 / 0.370
G22     191.9          53.1                9.5 +/-    0.54      11.6 +/-    0.54  0.030 / 0.030
G23     321.6          51.5                9.9 +/-    0.49      12.2 +/-    0.49  0.040 / 0.030
G26     66.6           50.6               10.2 +/-    1.04      12.7 +/-    1.04  0.250 / 0.230
G31     53.1           18.0                8.4 +/-    2.98      19.3 +/-    2.98  0.260 / 0.130