PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-09:42:40
G02     37.7           51.7                4.7 +/-    0.61       5.8 +/-    0.61  0.040 / 0.050
G05     133.1          64.3                9.0 +/-    1.03       9.9 +/-    1.03  0.030 / 0.030
G06     54.1           17.7                2.8 +/-    0.61       6.6 +/-    0.61  0.030 / 0.040
G12     200.2          66.2                5.5 +/-    1.33       5.9 +/-    1.33  0.030 / 0.040
G20     200.4          25.5                4.0 +/-    1.71       7.6 +/-    1.71  0.080 / 0.260
G25     293.4          54.7                4.4 +/-    0.64       5.3 +/-    0.64  0.080 / 0.260
G29     310.5          32.3                2.9 +/-    1.18       4.8 +/-    1.18  0.080 / 0.110