PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-20:58:00
G01     71.9           33.1               13.0 +/-    0.62      21.4 +/-    0.62  0.100 / 0.430
G07     136.9          32.4               16.2 +/-    1.17      27.1 +/-    1.17  0.130 / 0.390
G11     55.3           32.5               10.9 +/-    1.13      18.2 +/-    1.13  0.040 / 0.090
G13     276.1          37.5               15.1 +/-    0.82      22.9 +/-    0.82  0.040 / 0.090
G15     303.4          15.1                9.3 +/-    3.07      23.1 +/-    3.07  0.070 / 0.090
G17     230.5          63.7               16.4 +/-    0.62      18.1 +/-    0.62  0.050 / 0.120
G18     50.2           19.0               10.1 +/-    0.84      22.8 +/-    0.84  0.070 / 0.120
G19     223.5          40.1               17.0 +/-    1.35      24.7 +/-    1.35  0.060 / 0.130
G28     18.6           59.4               13.3 +/-    0.35      15.2 +/-    0.35  0.030 / 0.060
G30     134.4          61.1               16.9 +/-    0.86      19.0 +/-    0.86  0.030 / 0.060