PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-08:27:20
G02     250.2          77.6                3.3 +/-    0.33       3.3 +/-    0.33  0.080 / 0.110
G05     171.8          17.4                3.2 +/-    2.64       7.6 +/-    2.64  0.060 / 0.120
G06     39.6           58.0                3.4 +/-    0.54       3.9 +/-    0.54  0.150 / 0.280
G12     321.2          53.5                2.9 +/-    0.64       3.5 +/-    0.64  0.170 / 0.170
G17     74.0           18.5                3.5 +/-    1.57       7.9 +/-    1.57  0.030 / 0.030
G19     57.8           38.7                4.1 +/-    1.78       6.0 +/-    1.78  0.030 / 0.030
G24     237.6          32.7                4.3 +/-    1.66       7.2 +/-    1.66  0.030 / 0.040
G25     317.0          19.9                0.6 +/-    2.00       1.2 +/-    2.00  0.030 / 0.040