PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-13:12:40
G02     84.7           13.0                5.0 +/-    2.02      13.1 +/-    2.02  0.060 / 0.090
G05     44.7           32.8                1.8 +/-    0.71       3.0 +/-    0.71  0.070 / 0.090
G13     96.6           33.4                9.0 +/-    0.82      14.7 +/-    0.82  0.100 / 0.180
G15     145.3          38.9                7.9 +/-    0.63      11.7 +/-    0.63  0.090 / 0.170
G20     235.2          24.0                6.7 +/-    0.92      13.4 +/-    0.92  0.050 / 0.110
G21     300.3          39.1                5.0 +/-    0.75       7.3 +/-    0.75  0.040 / 0.120
G25     202.7          21.7                5.4 +/-    1.73      11.4 +/-    1.73  0.060 / 0.070
G26     306.2          17.3                3.5 +/-    1.70       8.1 +/-    1.70  0.060 / 0.070
G29     64.3           86.4                5.4 +/-    0.63       5.4 +/-    0.63  0.030 / 0.020