PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-21:57:30
G03     252.8          70.0                7.5 +/-    0.61       7.9 +/-    0.61  0.040 / 0.060
G09     301.3          16.6                5.1 +/-    2.88      12.1 +/-    2.88  0.040 / 0.050
G14     96.2           16.6                8.5 +/-    1.68      20.4 +/-    1.68  0.160 / 0.470
G16     136.1          54.7                9.2 +/-    0.78      11.0 +/-    0.78  0.160 / 0.410
G22     199.9          60.2                7.7 +/-    0.87       8.7 +/-    0.87  0.030 / 0.040
G23     314.3          43.6                6.0 +/-    1.46       8.3 +/-    1.46  0.030 / 0.050
G26     80.7           55.1                6.8 +/-    0.97       8.1 +/-    0.97  0.040 / 0.060
G31     48.8           26.9                5.2 +/-    2.00       9.7 +/-    2.00  0.030 / 0.040