PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-09:12:30
G02     344.2          78.3                4.2 +/-    0.68       4.2 +/-    0.68  0.120 / 0.160
G05     165.5          33.0                5.4 +/-    2.03       9.0 +/-    2.03  0.190 / 0.260
G06     40.9           41.7                3.2 +/-    0.92       4.5 +/-    0.92  0.080 / 0.070
G12     311.4          70.7                3.6 +/-    0.58       3.8 +/-    0.58  0.060 / 0.080
G19     74.1           28.7                6.6 +/-    1.28      11.9 +/-    1.28  0.030 / 0.030
G24     223.8          21.2                3.5 +/-    3.23       7.4 +/-    3.23  0.030 / 0.030
G25     316.1          35.1                2.9 +/-    1.56       4.6 +/-    1.56  0.060 / 0.080