PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-13:12:40
G01     73.0           32.9                4.9 +/-    0.97       8.0 +/-    0.97  0.090 / 0.220
G07     136.1          30.3                7.2 +/-    1.13      12.6 +/-    1.13  0.090 / 0.210
G11     54.3           29.8                5.8 +/-    2.18      10.2 +/-    2.18  0.030 / 0.020
G13     279.7          36.9                5.5 +/-    0.76       8.4 +/-    0.76  0.030 / 0.030
G15     306.2          14.0                4.1 +/-    1.20      10.5 +/-    1.20  0.050 / 0.080
G17     231.1          70.0                5.8 +/-    0.69       6.2 +/-    0.69  0.070 / 0.100
G19     222.8          42.1                6.1 +/-    2.34       8.5 +/-    2.34  0.040 / 0.070
G28     16.4           59.5                5.8 +/-    0.88       6.6 +/-    0.88  0.040 / 0.070
G30     131.9          65.7                6.6 +/-    1.04       7.2 +/-    1.04  0.030 / 0.030