PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-17:27:50
G08     273.7          21.5                8.5 +/-    1.74      18.0 +/-    1.74  0.070 / 0.200
G10     45.1           60.8                8.8 +/-    0.55       9.9 +/-    0.55  0.110 / 0.190
G14     250.2          61.2                8.7 +/-    0.81       9.8 +/-    0.81  0.030 / 0.030
G18     315.1          27.5                6.0 +/-    2.90      11.0 +/-    2.90  0.030 / 0.040
G20     86.4           42.2                8.8 +/-    0.69      12.4 +/-    0.69  0.090 / 0.140
G21     152.1          20.5                7.5 +/-    1.89      16.4 +/-    1.89  0.140 / 0.160
G24     41.7           12.7                6.9 +/-    1.89      18.3 +/-    1.89  0.070 / 0.050
G27     241.2          22.3                7.4 +/-    3.59      15.5 +/-    3.59  0.060 / 0.060
G31     182.7          18.4                8.3 +/-    4.34      19.0 +/-    4.34  0.110 / 0.260
G32     297.8          75.8                8.8 +/-    0.80       9.1 +/-    0.80  0.120 / 0.250