PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-17:28:10
G02     202.2          26.7               14.1 +/-    2.28      26.5 +/-    2.28  0.130 / 0.160
G06     163.0          63.7               15.3 +/-    0.45      16.9 +/-    0.45  0.130 / 0.130
G12     305.0          13.4               12.5 +/-    3.07      32.3 +/-    3.07  0.050 / 0.040
G17     29.8           54.1               11.9 +/-    1.02      14.3 +/-    1.02  0.050 / 0.040
G19     337.1          69.0               12.6 +/-    0.70      13.4 +/-    0.70  0.100 / 0.250
G24     303.3          35.6               12.6 +/-    1.85      19.9 +/-    1.85  0.260 / 0.210
G28     96.1           35.3               14.6 +/-    1.18      23.1 +/-    1.18  0.050 / 0.030