PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-22:27:30
G07     337.7          59.6                9.9 +/-    0.37      11.3 +/-    0.37  0.100 / 0.160
G08     96.7           53.2               11.2 +/-    0.74      13.6 +/-    0.74  0.100 / 0.130
G09     190.2          70.9               12.6 +/-    1.24      13.3 +/-    1.24  0.040 / 0.040
G11     145.9          14.4               10.7 +/-    1.36      27.1 +/-    1.36  0.040 / 0.070
G23     156.1          36.7               11.7 +/-    0.59      18.1 +/-    0.59  0.090 / 0.080
G27     51.4           29.2                9.4 +/-    1.56      16.8 +/-    1.56  0.090 / 0.170
G28     240.5          32.9               11.7 +/-    1.53      19.3 +/-    1.53  0.140 / 0.410
G30     307.5          41.0               10.0 +/-    1.52      14.4 +/-    1.52  0.210 / 0.470