PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-20:27:50
G01     250.6          35.5                8.7 +/-    1.29      13.6 +/-    1.29  0.070 / 0.110
G03     316.1          44.0                6.6 +/-    2.77       9.0 +/-    2.77  0.080 / 0.110
G11     235.6          11.5                9.2 +/-    2.67      24.8 +/-    2.67  0.060 / 0.120
G14     60.9           40.1                2.5 +/-    0.64       3.7 +/-    0.64  0.060 / 0.100
G18     217.0          26.0                9.4 +/-    2.13      18.0 +/-    2.13  0.050 / 0.080
G22     304.2          66.1                8.0 +/-    0.67       8.6 +/-    0.67  0.050 / 0.120
G23     286.0          17.8                8.5 +/-    1.44      19.7 +/-    1.44  0.120 / 0.440
G26     139.4          37.3               11.4 +/-    0.96      17.4 +/-    0.96  0.140 / 0.400
G31     40.5           62.9                7.4 +/-    0.85       8.2 +/-    0.85  0.040 / 0.060
G32     76.8           23.7                7.4 +/-    1.19      14.8 +/-    1.19  0.040 / 0.050