PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-19:28:00
G02     295.0          80.8                9.8 +/-    0.82      10.0 +/-    0.82  0.060 / 0.110
G05     167.1          27.1               13.0 +/-    1.34      24.3 +/-    1.34  0.050 / 0.110
G06     40.7           44.7                8.0 +/-    0.48      10.8 +/-    0.48  0.030 / 0.050
G12     318.5          68.1                7.5 +/-    0.81       8.0 +/-    0.81  0.040 / 0.050
G17     80.8           15.2                9.4 +/-    1.40      23.2 +/-    1.40  0.090 / 0.140
G19     67.0           33.7                9.5 +/-    0.70      15.5 +/-    0.70  0.090 / 0.140
G24     232.4          27.0               13.5 +/-    2.05      25.3 +/-    2.05  0.040 / 0.040
G25     317.7          23.1                7.9 +/-    1.63      16.0 +/-    1.63  0.030 / 0.030