PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-03:57:40
G02     47.1           42.9                4.9 +/-    0.68       6.9 +/-    0.68  0.060 / 0.040
G05     95.5           68.7                5.1 +/-    0.61       5.4 +/-    0.61  0.050 / 0.020
G12     189.7          51.6                6.4 +/-    0.70       7.9 +/-    0.70  0.040 / 0.010
G20     210.0          16.7                4.4 +/-    1.99      10.5 +/-    1.99  0.030 / 0.010
G25     270.7          58.0                2.3 +/-    1.53       2.6 +/-    1.53  0.040 / 0.020
G29     317.3          39.3                3.6 +/-    0.88       5.3 +/-    0.88  0.040 / 0.020