PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-13:12:50
G10     244.0          23.0                4.4 +/-    0.72       9.0 +/-    0.72  0.150 / 0.380
G13     60.7           32.3                5.9 +/-    1.98       9.9 +/-    1.98  0.120 / 0.360
G15     96.1           56.4                7.6 +/-    1.26       8.9 +/-    1.26  0.050 / 0.050
G16     302.9          15.6                3.9 +/-    2.14       9.6 +/-    2.14  0.040 / 0.050
G20     262.5          48.7                6.8 +/-    3.59       8.7 +/-    3.59  0.040 / 0.040
G21     326.7          55.3                3.7 +/-    0.51       4.4 +/-    0.51  0.040 / 0.040
G26     276.6          17.9                5.4 +/-    1.94      12.6 +/-    1.94  0.060 / 0.100
G29     160.8          60.4                8.5 +/-    0.40       9.6 +/-    0.40  0.070 / 0.090