PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-12:57:40
G02     70.5           22.8                3.9 +/-    2.17       8.0 +/-    2.17  0.030 / 0.040
G05     47.4           52.3                4.2 +/-    0.67       5.2 +/-    0.67  0.030 / 0.040
G12     179.5          17.8                4.7 +/-    0.78      10.9 +/-    0.78  0.110 / 0.220
G13     115.6          23.1                6.2 +/-    1.15      12.7 +/-    1.15  0.140 / 0.250
G15     154.3          24.3                6.3 +/-    2.08      12.6 +/-    2.08  0.030 / 0.030
G20     225.1          11.2               -4.3 +/-   16.61     -11.6 +/-   16.61  0.030 / 0.030
G21     282.5          25.2                7.0 +/-    2.63      13.6 +/-    2.63  0.130 / 0.200
G25     221.6          42.0                6.9 +/-    2.96       9.7 +/-    2.96  0.100 / 0.230
G29     336.9          66.1                4.9 +/-    0.76       5.3 +/-    0.76  0.060 / 0.130