PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-16:27:50
G08     300.3          22.8                4.2 +/-    0.87       8.5 +/-    0.87  0.060 / 0.050
G10     350.0          62.1                6.8 +/-    0.55       7.6 +/-    0.55  0.060 / 0.060
G14     222.8          39.1                6.9 +/-    1.37      10.2 +/-    1.37  0.070 / 0.080
G20     52.3           56.6                8.1 +/-    0.58       9.5 +/-    0.58  0.080 / 0.080
G21     140.9          45.4                9.0 +/-    0.72      12.1 +/-    0.72  0.080 / 0.100
G24     61.0           26.2                7.8 +/-    1.56      14.9 +/-    1.56  0.080 / 0.130
G27     267.7          35.1                6.0 +/-    2.26       9.5 +/-    2.26  0.020 / 0.020
G32     231.4          59.0                7.1 +/-    1.70       8.1 +/-    1.70  0.030 / 0.030