PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-20:27:50
G01     269.5          41.2                8.2 +/-    1.46      11.8 +/-    1.46  0.050 / 0.080
G03     316.0          30.0                6.8 +/-    1.21      11.9 +/-    1.21  0.060 / 0.090
G10     130.1          15.5                9.4 +/-    1.25      23.0 +/-    1.25  0.110 / 0.130
G11     248.1          19.3                8.3 +/-    0.83      18.6 +/-    0.83  0.130 / 0.180
G14     44.9           49.1                6.4 +/-    1.14       8.2 +/-    1.14  0.040 / 0.080
G18     229.2          37.7                8.3 +/-    0.88      12.6 +/-    0.88  0.040 / 0.070
G22     313.9          52.2                6.3 +/-    1.65       7.8 +/-    1.65  0.110 / 0.210
G25     46.7           12.8               13.2 +/-    1.23      34.6 +/-    1.23  0.090 / 0.290
G31     58.9           77.2                6.1 +/-    0.64       6.2 +/-    0.64  0.040 / 0.070
G32     64.2           32.7                6.3 +/-    0.41      10.4 +/-    0.41  0.040 / 0.060