PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-19:27:50
G01     117.4          19.2               15.3 +/-    1.35      34.3 +/-    1.35  0.060 / 0.070
G07     84.8           65.9               13.6 +/-    0.37      14.7 +/-    0.37  0.040 / 0.080
G08     45.2           33.0               10.5 +/-    0.61      17.3 +/-    0.61  0.110 / 0.290
G09     177.1          24.4               14.7 +/-    1.45      29.1 +/-    1.45  0.120 / 0.230
G11     106.1          40.7               15.1 +/-    1.18      21.7 +/-    1.18  0.030 / 0.040
G13     316.8          20.7               10.6 +/-    3.87      22.9 +/-    3.87  0.030 / 0.040
G17     203.5          22.7               14.2 +/-    0.61      29.2 +/-    0.61  0.060 / 0.080
G18     92.7           21.6               13.2 +/-    0.78      27.9 +/-    0.78  0.060 / 0.090
G28     297.2          58.3               12.6 +/-    0.89      14.6 +/-    0.89  0.050 / 0.060
G30     354.7          71.3               12.7 +/-    0.85      13.3 +/-    0.85  0.050 / 0.050