PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-19:27:50
G01     61.1           30.9               12.7 +/-    0.74      21.7 +/-    0.74  0.100 / 0.360
G07     141.9          23.6               14.9 +/-    1.44      30.1 +/-    1.44  0.120 / 0.330
G11     49.0           25.1               10.9 +/-    0.64      21.3 +/-    0.64  0.040 / 0.040
G13     263.8          35.5               14.8 +/-    1.65      23.2 +/-    1.65  0.040 / 0.040
G15     295.4          16.1               11.5 +/-    2.79      28.0 +/-    2.79  0.060 / 0.180
G17     250.9          73.0               14.8 +/-    0.52      15.4 +/-    0.52  0.060 / 0.210
G18     43.1           13.7                9.0 +/-    1.25      23.0 +/-    1.25  0.070 / 0.210
G19     231.5          48.2               15.5 +/-    1.63      20.0 +/-    1.63  0.060 / 0.170
G28     34.5           56.9               12.1 +/-    0.47      14.2 +/-    0.47  0.040 / 0.060
G30     142.9          52.6               15.0 +/-    1.40      18.3 +/-    1.40  0.040 / 0.060