PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-17:12:50
G01     126.5          12.2               14.8 +/-    4.04      39.4 +/-    4.04  0.050 / 0.050
G07     54.0           69.6               13.9 +/-    0.45      14.7 +/-    0.45  0.040 / 0.050
G08     50.9           40.8               12.2 +/-    1.01      17.5 +/-    1.01  0.030 / 0.030
G09     178.1          35.2               14.3 +/-    2.07      22.6 +/-    2.07  0.030 / 0.020
G11     118.4          35.6               15.0 +/-    0.79      23.5 +/-    0.79  0.030 / 0.030
G13     321.0          12.2                9.6 +/-   15.75      25.5 +/-   15.75  0.030 / 0.040
G17     201.0          13.3               15.5 +/-    2.28      40.1 +/-    2.28  0.240 / 0.300
G18     103.4          17.0               12.8 +/-    2.06      30.2 +/-    2.06  0.250 / 0.380
G28     277.8          53.5               13.8 +/-    3.01      16.7 +/-    3.01  0.130 / 0.220
G30     334.9          61.7               13.4 +/-    0.52      14.9 +/-    0.52  0.100 / 0.220