PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-08:28:00
G02     29.1           59.4                2.9 +/-    0.39       3.3 +/-    0.39  0.050 / 0.040
G05     147.9          56.0                5.5 +/-    0.65       6.5 +/-    0.65  0.030 / 0.030
G06     49.2           24.6                1.4 +/-    1.58       2.7 +/-    1.58  0.020 / 0.030
G12     220.7          75.6                4.9 +/-    1.12       5.0 +/-    1.12  0.030 / 0.030
G19     94.7           13.6                4.2 +/-    0.89      10.9 +/-    0.89  0.050 / 0.060
G20     199.7          15.7                4.5 +/-    2.03      11.1 +/-    2.03  0.040 / 0.070
G25     306.2          47.9                4.7 +/-    1.42       6.1 +/-    1.42  0.180 / 0.300
G29     303.3          24.8                3.5 +/-    1.79       6.8 +/-    1.79  0.160 / 0.250