PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-19:28:00
G07     350.2          63.4               13.3 +/-    0.39      14.7 +/-    0.39  0.040 / 0.040
G08     87.2           54.7               11.9 +/-    1.25      14.2 +/-    1.25  0.040 / 0.040
G09     184.0          62.4               14.0 +/-    0.87      15.6 +/-    0.87  0.070 / 0.080
G11     140.3          19.6               14.2 +/-    1.78      31.6 +/-    1.78  0.060 / 0.060
G23     157.2          26.8               12.8 +/-    0.78      24.1 +/-    0.78  0.050 / 0.130
G27     45.9           24.6               10.7 +/-    1.54      21.1 +/-    1.54  0.080 / 0.140
G28     247.3          38.3               13.9 +/-    0.86      20.9 +/-    0.86  0.030 / 0.050
G30     312.5          44.5               12.5 +/-    0.98      17.0 +/-    0.98  0.040 / 0.050