PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-15:27:40
G01     43.3           19.0                8.3 +/-    0.77      18.8 +/-    0.77  0.070 / 0.090
G06     175.9          34.9               11.4 +/-    0.93      18.2 +/-    0.93  0.070 / 0.080
G13     243.2          24.7               11.0 +/-    1.35      21.6 +/-    1.35  0.130 / 0.360
G15     277.3          13.5               10.3 +/-    2.08      26.7 +/-    2.08  0.170 / 0.390
G17     0.5            72.0               10.7 +/-    0.54      11.2 +/-    0.54  0.090 / 0.220
G19     270.3          68.9                9.6 +/-    0.65      10.2 +/-    0.65  0.080 / 0.220
G24     318.3          14.4                7.7 +/-    1.29      19.5 +/-    1.29  0.050 / 0.040
G28     66.6           48.6                9.6 +/-    0.90      12.3 +/-    0.90  0.030 / 0.040
G30     153.7          33.6               10.2 +/-    0.88      16.6 +/-    0.88  0.070 / 0.160