PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-17:58:00
G07     343.4          61.5               12.1 +/-    0.54      13.6 +/-    0.54  0.050 / 0.070
G08     91.8           54.1               13.6 +/-    0.83      16.4 +/-    0.83  0.100 / 0.070
G09     185.5          66.3               13.5 +/-    0.25      14.6 +/-    0.25  0.050 / 0.040
G11     142.3          17.3               15.0 +/-    2.17      35.2 +/-    2.17  0.060 / 0.040
G23     156.0          29.5               13.9 +/-    1.02      24.7 +/-    1.02  0.090 / 0.110
G27     48.6           27.2               10.1 +/-    1.78      18.8 +/-    1.78  0.130 / 0.120
G28     243.7          35.4               16.0 +/-    2.18      25.2 +/-    2.18  0.040 / 0.040
G30     308.8          41.2               11.9 +/-    1.28      17.0 +/-    1.28  0.030 / 0.040