PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-11:57:40
G01     55.3           28.4                4.9 +/-    2.60       8.8 +/-    2.60  0.060 / 0.130
G06     180.0          18.4                6.0 +/-    2.70      13.7 +/-    2.70  0.050 / 0.110
G07     144.0          16.0                4.9 +/-    2.18      11.8 +/-    2.18  0.040 / 0.040
G11     45.9           18.2                2.4 +/-    2.03       5.4 +/-    2.03  0.040 / 0.040
G13     259.3          33.1                7.5 +/-    2.46      12.4 +/-    2.46  0.100 / 0.130
G15     290.4          16.2                7.1 +/-    1.14      17.2 +/-    1.14  0.120 / 0.200
G17     293.9          79.9                7.0 +/-    0.65       7.1 +/-    0.65  0.030 / 0.020
G19     239.2          57.0                7.7 +/-    2.75       9.0 +/-    2.75  0.030 / 0.020
G28     44.2           54.8                4.7 +/-    0.72       5.6 +/-    0.72  0.150 / 0.280
G30     146.5          48.6                7.5 +/-    0.95       9.7 +/-    0.95  0.190 / 0.280