PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-18:43:10
G08     273.6          20.2               10.4 +/-    1.69      22.7 +/-    1.69  0.470 / 0.470
G10     48.1           61.0               10.8 +/-    0.87      12.1 +/-    0.87  0.220 / 0.440
G11     315.6          12.6                6.1 +/-    7.96      16.1 +/-    7.96  0.140 / 0.150
G14     254.8          62.3               10.8 +/-    0.54      12.0 +/-    0.54  0.090 / 0.140
G18     86.8           38.6               12.9 +/-    1.03      19.3 +/-    1.03  0.270 / 0.190
G21     151.8          16.3               13.2 +/-    1.94      31.7 +/-    1.94  0.310 / 0.320
G24     43.0           15.4                9.1 +/-    2.07      22.5 +/-    2.07  0.030 / 0.020
G27     235.3          19.6               11.1 +/-    4.45      24.7 +/-    4.45  0.040 / 0.030
G31     180.7          22.8               14.3 +/-    0.98      29.3 +/-    0.98  0.040 / 0.050
G32     310.6          75.8               11.0 +/-    0.40      11.4 +/-    0.40  0.040 / 0.060