PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-13:28:00
G10     255.5          31.2                4.2 +/-    0.84       7.1 +/-    0.84  0.040 / 0.040
G13     48.8           26.1                3.3 +/-    0.68       6.3 +/-    0.68  0.050 / 0.050
G15     76.7           56.3                1.5 +/-    0.55       1.8 +/-    0.55  0.060 / 0.180
G16     292.6          14.4                2.7 +/-    1.74       6.8 +/-    1.74  0.060 / 0.220
G20     277.9          54.4                5.0 +/-    1.09       6.0 +/-    1.09  0.110 / 0.130
G21     349.5          66.5                0.2 +/-    0.50       0.2 +/-    0.50  0.090 / 0.090
G26     266.4          13.1                3.5 +/-    2.42       9.1 +/-    2.42  0.030 / 0.040
G29     164.4          41.7                5.6 +/-    1.43       7.9 +/-    1.43  0.040 / 0.040