PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-22:57:30
G07     352.0          63.8                9.0 +/-    0.56      10.0 +/-    0.56  0.040 / 0.110
G08     81.7           53.3                8.3 +/-    1.05      10.1 +/-    1.05  0.050 / 0.090
G09     184.1          62.0                9.0 +/-    0.62      10.0 +/-    0.62  0.040 / 0.030
G11     140.4          19.7               12.6 +/-    3.00      27.9 +/-    3.00  0.040 / 0.040
G23     158.1          28.4               10.7 +/-    1.52      19.3 +/-    1.52  0.100 / 0.090
G27     45.4           23.9                7.8 +/-    2.58      15.6 +/-    2.58  0.090 / 0.220
G28     248.1          39.0                9.8 +/-    1.19      14.5 +/-    1.19  0.150 / 0.360
G30     315.1          47.0                8.2 +/-    0.86      10.7 +/-    0.86  0.150 / 0.430