PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-18:28:00
G01     318.5          19.8                9.5 +/-    2.03      21.0 +/-    2.03  0.160 / 0.320
G08     253.6          12.2               10.8 +/-    3.16      28.7 +/-    3.16  0.160 / 0.370
G10     83.3           51.4               12.1 +/-    0.66      15.0 +/-    0.66  0.030 / 0.050
G11     300.0          24.8                6.4 +/-    1.59      12.6 +/-    1.59  0.030 / 0.050
G14     305.3          71.4               11.4 +/-    0.61      12.0 +/-    0.61  0.110 / 0.200
G18     300.2          44.7               10.9 +/-    1.00      14.8 +/-    1.00  0.160 / 0.230
G20     107.2          27.5               11.3 +/-    2.82      20.9 +/-    2.82  0.050 / 0.060
G22     301.8          11.6               10.0 +/-    3.81      27.0 +/-    3.81  0.050 / 0.050
G31     178.9          40.9               14.9 +/-    1.46      21.3 +/-    1.46  0.180 / 0.390
G32     9.1            66.7               10.1 +/-    0.59      10.9 +/-    0.59  0.180 / 0.350