PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-01:57:50
G01     111.7          23.0                6.1 +/-    1.37      12.5 +/-    1.37  0.040 / 0.040
G07     98.5           61.7                5.8 +/-    0.93       6.5 +/-    0.93  0.040 / 0.050
G08     42.8           25.5                4.4 +/-    2.50       8.6 +/-    2.50  0.140 / 0.090
G09     176.4          18.9                8.9 +/-    1.59      20.1 +/-    1.59  0.130 / 0.150
G11     98.3           42.3                6.6 +/-    0.84       9.2 +/-    0.84  0.130 / 0.120
G13     313.7          24.6                4.7 +/-    1.66       9.2 +/-    1.66  0.090 / 0.100
G17     204.3          32.5                8.9 +/-    2.07      14.8 +/-    2.07  0.100 / 0.150
G28     309.8          60.2                5.0 +/-    1.20       5.7 +/-    1.20  0.130 / 0.160
G30     20.7           76.2                5.4 +/-    0.95       5.5 +/-    0.95  0.030 / 0.030