PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-16:12:40
G08     314.4          16.8                5.7 +/-    2.49      13.4 +/-    2.49  0.040 / 0.040
G10     318.6          57.7                5.5 +/-    0.85       6.4 +/-    0.85  0.040 / 0.050
G14     214.1          24.0                7.2 +/-    1.14      14.3 +/-    1.14  0.120 / 0.210
G15     45.8           18.0                5.0 +/-    1.97      11.5 +/-    1.97  0.170 / 0.220
G20     22.2           63.0                6.0 +/-    1.64       6.6 +/-    1.64  0.030 / 0.030
G21     125.7          60.9                6.4 +/-    0.56       7.2 +/-    0.56  0.040 / 0.030
G24     78.5           28.3                6.1 +/-    1.63      11.0 +/-    1.63  0.080 / 0.070
G27     288.1          36.5                7.4 +/-    1.78      11.5 +/-    1.78  0.060 / 0.070
G32     217.2          43.6                6.8 +/-    0.75       9.4 +/-    0.75  0.060 / 0.060