PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-22:42:50
G07     336.8          59.2                7.7 +/-    0.53       8.8 +/-    0.53  0.080 / 0.130
G08     97.5           53.0               10.0 +/-    0.54      12.2 +/-    0.54  0.090 / 0.200
G09     190.9          71.6                9.1 +/-    0.96       9.5 +/-    0.96  0.120 / 0.070
G11     146.2          14.0                8.1 +/-    2.48      20.6 +/-    2.48  0.060 / 0.080
G23     156.0          37.5                8.9 +/-    0.89      13.6 +/-    0.89  0.030 / 0.040
G27     51.9           29.5                8.2 +/-    1.86      14.5 +/-    1.86  0.040 / 0.040
G28     240.0          32.4                8.1 +/-    1.63      13.5 +/-    1.63  0.040 / 0.070
G30     307.2          40.8                9.0 +/-    1.25      13.0 +/-    1.25  0.030 / 0.060