PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-23:12:30
G07     16.1           68.2                9.8 +/-    0.69      10.4 +/-    0.69  0.090 / 0.100
G08     64.9           49.7               10.6 +/-    0.42      13.5 +/-    0.42  0.060 / 0.110
G09     180.9          50.2               12.7 +/-    0.93      16.0 +/-    0.93  0.050 / 0.040
G11     132.6          26.8               10.5 +/-    1.62      19.7 +/-    1.62  0.040 / 0.040
G23     159.6          17.9               12.2 +/-    2.44      28.2 +/-    2.44  0.090 / 0.180
G27     40.0           16.1                8.4 +/-    2.27      20.3 +/-    2.27  0.130 / 0.500
G28     260.1          46.3               10.0 +/-    3.87      13.2 +/-    3.87  0.040 / 0.030
G30     325.1          54.5                8.8 +/-    0.81      10.5 +/-    0.81  0.040 / 0.040