PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-11:27:30
G02     57.8           34.1                2.9 +/-    0.78       4.7 +/-    0.78  0.140 / 0.240
G05     62.8           64.2                3.6 +/-    0.37       3.9 +/-    0.37  0.130 / 0.220
G12     185.5          35.7                7.0 +/-    2.42      10.9 +/-    2.42  0.030 / 0.040
G13     129.3          13.7                4.6 +/-    1.90      11.7 +/-    1.90  0.040 / 0.040
G15     165.8          10.2               -9.3 +/-   11.58     -25.8 +/-   11.58  0.130 / 0.440
G21     271.1          18.9                3.3 +/-    1.40       7.4 +/-    1.40  0.130 / 0.440
G25     229.5          52.3                4.6 +/-    0.97       5.6 +/-    0.97  0.050 / 0.090
G29     328.6          54.1               -2.4 +/-    1.29      -2.9 +/-    1.29  0.040 / 0.080