PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-13:27:30
G10     249.5          27.9                5.4 +/-    1.51       9.8 +/-    1.51  0.190 / 0.420
G13     54.0           29.2                6.8 +/-    1.47      12.1 +/-    1.47  0.170 / 0.510
G15     82.7           55.7                6.7 +/-    0.75       8.0 +/-    0.75  0.050 / 0.040
G16     296.3          16.0                5.7 +/-    2.56      13.7 +/-    2.56  0.040 / 0.040
G20     271.5          53.1                7.6 +/-    2.78       9.2 +/-    2.78  0.060 / 0.040
G21     334.6          59.8                4.4 +/-    0.89       5.0 +/-    0.89  0.060 / 0.040
G26     270.0          15.8                3.8 +/-    3.28       9.3 +/-    3.28  0.090 / 0.120
G29     163.3          52.7                8.7 +/-    0.61      10.6 +/-    0.61  0.070 / 0.110