PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-19:42:40
G03     208.0          56.1               14.4 +/-    0.97      17.0 +/-    0.97  0.080 / 0.070
G07     257.3          15.2               11.3 +/-    2.97      28.0 +/-    2.97  0.040 / 0.060
G09     310.2          27.4               11.0 +/-    0.54      20.3 +/-    0.54  0.170 / 0.380
G16     96.1           65.0               13.6 +/-    1.24      14.9 +/-    1.24  0.100 / 0.310
G22     187.1          40.4               13.4 +/-    0.73      19.4 +/-    0.73  0.040 / 0.030
G23     332.2          61.4               12.4 +/-    0.59      13.9 +/-    0.59  0.040 / 0.030
G26     53.0           42.6               10.7 +/-    1.09      15.0 +/-    1.09  0.200 / 0.350
G27     133.0          11.3               14.2 +/-    3.61      38.5 +/-    3.61  0.190 / 0.250
G31     59.8           9.6                 9.6 +/-    1.60      27.2 +/-    1.60  0.060 / 0.190