PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-22:58:00
G07     28.0           69.3               11.1 +/-    0.52      11.8 +/-    0.52  0.040 / 0.060
G08     59.6           47.4                9.0 +/-    0.77      11.8 +/-    0.77  0.040 / 0.050
G09     180.2          45.5               14.5 +/-    1.88      19.4 +/-    1.88  0.050 / 0.080
G11     129.2          29.7               15.5 +/-    1.41      27.3 +/-    1.41  0.060 / 0.090
G23     159.9          13.5               15.8 +/-    2.82      40.7 +/-    2.82  0.100 / 0.140
G27     38.6           12.7                7.4 +/-    1.85      19.5 +/-    1.85  0.110 / 0.140
G28     265.7          49.0               11.6 +/-    1.27      14.8 +/-    1.27  0.030 / 0.030
G30     329.5          57.6               10.0 +/-    0.67      11.6 +/-    0.67  0.020 / 0.040