PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-11:12:50
G02     72.9           20.3                4.9 +/-    0.96      10.8 +/-    0.96  0.040 / 0.040
G05     46.1           48.3                4.9 +/-    0.61       6.3 +/-    0.61  0.030 / 0.050
G12     179.9          16.6                4.8 +/-    1.29      11.4 +/-    1.29  0.190 / 0.390
G13     113.2          24.6                9.3 +/-    1.39      18.4 +/-    1.39  0.200 / 0.330
G15     151.8          26.9                5.4 +/-    1.72      10.0 +/-    1.72  0.070 / 0.170
G20     226.3          13.9                2.2 +/-   18.95       5.6 +/-   18.95  0.090 / 0.150
G21     285.0          27.4                3.6 +/-    1.70       6.6 +/-    1.70  0.030 / 0.030
G25     218.7          39.6                5.9 +/-    1.03       8.7 +/-    1.03  0.030 / 0.030
G26     317.8          11.1               -7.6 +/-   30.80     -20.7 +/-   30.80  0.130 / 0.160
G29     339.0          68.7                6.0 +/-    0.52       6.4 +/-    0.52  0.120 / 0.170