PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-08:58:00
G08     264.1          15.2                6.9 +/-    3.47      17.2 +/-    3.47  0.030 / 0.060
G10     72.5           55.6                5.1 +/-    0.61       6.0 +/-    0.61  0.040 / 0.040
G11     307.7          20.0                5.4 +/-    1.43      11.9 +/-    1.43  0.170 / 0.370
G14     274.4          65.5                6.0 +/-    0.59       6.5 +/-    0.59  0.160 / 0.370
G18     308.8          36.2                6.4 +/-    1.05       9.9 +/-    1.05  0.120 / 0.230
G20     107.6          13.9                4.4 +/-    1.42      11.2 +/-    1.42  0.100 / 0.270
G22     299.4          11.1                0.6 +/-    4.35       1.7 +/-    4.35  0.100 / 0.280
G27     226.8          11.4                6.1 +/-   11.70      16.4 +/-   11.70  0.140 / 0.220
G31     175.2          39.1                6.2 +/-    1.14       9.2 +/-    1.14  0.170 / 0.260
G32     2.8            69.5                4.9 +/-    0.50       5.2 +/-    0.50  0.160 / 0.370