PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-01:58:00
G01     111.7          23.0                7.9 +/-    1.28      16.2 +/-    1.28  0.040 / 0.060
G07     98.5           61.7                5.9 +/-    0.77       6.6 +/-    0.77  0.040 / 0.060
G08     42.8           25.5                4.4 +/-    1.18       8.5 +/-    1.18  0.080 / 0.210
G09     176.4          18.9                9.0 +/-    1.98      20.5 +/-    1.98  0.120 / 0.220
G11     98.3           42.3                7.7 +/-    0.91      10.7 +/-    0.91  0.060 / 0.110
G13     313.7          24.6                7.1 +/-    1.51      13.9 +/-    1.51  0.060 / 0.110
G17     204.3          32.5                9.9 +/-    1.03      16.5 +/-    1.03  0.050 / 0.090
G28     309.8          60.2                6.9 +/-    0.57       7.8 +/-    0.57  0.040 / 0.090
G30     20.7           76.2                6.3 +/-    0.60       6.4 +/-    0.60  0.030 / 0.040