PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-13:28:00
G01     113.4          21.6                7.9 +/-    0.88      16.8 +/-    0.88  0.110 / 0.150
G07     97.4           60.0                8.8 +/-    0.89      10.0 +/-    0.89  0.110 / 0.150
G08     42.7           24.4                7.4 +/-    2.59      14.6 +/-    2.59  0.140 / 0.150
G09     174.5          18.3                7.9 +/-    1.27      18.2 +/-    1.27  0.130 / 0.190
G11     95.7           40.0                8.4 +/-    0.63      12.3 +/-    0.63  0.030 / 0.030
G13     315.6          22.2                6.2 +/-    1.86      12.8 +/-    1.86  0.030 / 0.030
G17     202.6          33.2                8.6 +/-    0.79      14.1 +/-    0.79  0.030 / 0.040
G28     304.5          59.3                6.6 +/-    1.15       7.5 +/-    1.15  0.030 / 0.040
G30     353.5          71.7                7.0 +/-    0.87       7.3 +/-    0.87  0.090 / 0.090