PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-20:58:30
G01     226.5          17.6               10.5 +/-    2.48      24.4 +/-    2.48  0.150 / 0.390
G03     288.7          67.6                7.9 +/-    0.47       8.5 +/-    0.47  0.120 / 0.370
G14     86.2           23.9                8.8 +/-    1.58      17.6 +/-    1.58  0.030 / 0.040
G16     149.0          43.3               11.1 +/-    0.84      15.3 +/-    0.84  0.030 / 0.050
G22     218.4          71.0                8.7 +/-    1.17       9.2 +/-    1.17  0.060 / 0.080
G23     305.7          35.1                9.5 +/-    0.94      15.1 +/-    0.94  0.060 / 0.070
G26     104.2          54.8               10.4 +/-    0.43      12.4 +/-    0.43  0.090 / 0.200
G31     43.7           37.3                6.8 +/-    0.69      10.3 +/-    0.69  0.090 / 0.200