PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-06:27:40
G02     33.5           55.4                3.8 +/-    0.58       4.6 +/-    0.58  0.070 / 0.180
G05     140.0          60.7                5.5 +/-    1.24       6.3 +/-    1.24  0.070 / 0.140
G06     52.1           19.3                1.9 +/-    0.93       4.2 +/-    0.93  0.040 / 0.040
G12     206.6          71.0                5.8 +/-    1.51       6.1 +/-    1.51  0.040 / 0.040
G19     98.5           11.0                3.8 +/-    1.72      10.4 +/-    1.72  0.110 / 0.410
G20     200.7          18.9                4.5 +/-    1.85      10.2 +/-    1.85  0.100 / 0.330
G25     300.9          51.2                3.8 +/-    0.71       4.7 +/-    0.71  0.030 / 0.030
G29     306.3          27.2                1.6 +/-    0.84       3.1 +/-    0.84  0.030 / 0.040