PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-19:12:50
G01     91.8           31.5               12.9 +/-    0.60      21.9 +/-    0.60  0.160 / 0.320
G07     124.2          47.2               14.1 +/-    1.04      18.5 +/-    1.04  0.160 / 0.330
G08     42.4           10.9                9.2 +/-    4.27      25.1 +/-    4.27  0.030 / 0.050
G11     71.4           40.9               12.3 +/-    0.78      17.6 +/-    0.78  0.030 / 0.040
G13     296.3          35.4               13.5 +/-    0.83      21.3 +/-    0.83  0.040 / 0.060
G17     214.2          48.8               16.5 +/-    1.23      21.1 +/-    1.23  0.040 / 0.050
G18     65.6           24.3               10.3 +/-    0.98      20.5 +/-    0.98  0.040 / 0.080
G19     214.2          24.5               17.3 +/-    2.70      34.1 +/-    2.70  0.040 / 0.090
G28     346.9          61.8               11.5 +/-    0.67      12.8 +/-    0.67  0.040 / 0.060
G30     101.1          76.1               15.4 +/-    1.68      15.8 +/-    1.68  0.040 / 0.060