PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-22:42:40
G03     208.5          54.0                9.2 +/-    0.64      11.1 +/-    0.64  0.060 / 0.340
G07     261.4          20.3                7.8 +/-    3.42      17.1 +/-    3.42  0.190 / 0.410
G09     313.2          33.7                5.9 +/-    0.71       9.5 +/-    0.71  0.160 / 0.180
G16     86.8           64.5                8.3 +/-    0.81       9.0 +/-    0.81  0.140 / 0.210
G22     187.7          37.3                9.3 +/-    0.96      14.1 +/-    0.96  0.050 / 0.040
G23     331.5          61.8                7.2 +/-    0.49       8.0 +/-    0.49  0.040 / 0.050
G26     51.8           42.3                6.2 +/-    0.85       8.7 +/-    0.85  0.050 / 0.040
G27     133.4          12.8               10.8 +/-    2.26      28.4 +/-    2.26  0.050 / 0.040
G31     60.8           10.8                5.6 +/-    1.65      15.3 +/-    1.65  0.040 / 0.040