PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-17:57:50
G08     271.2          20.7                6.7 +/-    2.79      14.6 +/-    2.79  0.120 / 0.380
G10     50.1           60.1                6.4 +/-    0.41       7.2 +/-    0.41  0.100 / 0.310
G14     254.5          62.9                6.6 +/-    0.62       7.4 +/-    0.62  0.030 / 0.030
G18     314.3          29.5                8.6 +/-    2.01      15.2 +/-    2.01  0.040 / 0.040
G20     89.1           40.6                7.3 +/-    0.42      10.5 +/-    0.42  0.050 / 0.060
G21     152.8          18.4                8.4 +/-    1.79      19.3 +/-    1.79  0.060 / 0.050
G24     40.4           10.8                6.8 +/-    2.64      18.5 +/-    2.64  0.180 / 0.260
G27     239.1          20.7                8.8 +/-    1.60      19.0 +/-    1.60  0.200 / 0.310
G31     182.0          21.1                9.8 +/-    3.06      20.9 +/-    3.06  0.090 / 0.140
G32     309.6          76.0                7.4 +/-    0.60       7.6 +/-    0.60  0.090 / 0.130