PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-17:57:40
G01     320.7          13.1                6.1 +/-    3.82      15.8 +/-    3.82  0.100 / 0.250
G08     260.6          16.2                8.2 +/-   13.52      19.7 +/-   13.52  0.100 / 0.280
G10     70.6           55.6               10.5 +/-    0.80      12.5 +/-    0.80  0.030 / 0.030
G11     307.1          21.0                7.5 +/-    3.16      16.1 +/-    3.16  0.030 / 0.030
G14     280.4          69.4               10.0 +/-    0.34      10.6 +/-    0.34  0.150 / 0.320
G18     307.7          38.9                8.2 +/-    1.12      12.2 +/-    1.12  0.120 / 0.280
G20     100.2          33.1                9.8 +/-    0.94      16.2 +/-    0.94  0.070 / 0.050
G27     230.6          13.3                7.4 +/-    1.69      19.2 +/-    1.69  0.060 / 0.050
G31     180.4          32.1               11.8 +/-    0.88      19.8 +/-    0.88  0.230 / 0.310
G32     350.3          72.0               10.3 +/-    0.83      10.7 +/-    0.83  0.250 / 0.460