PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-21:28:10
G01     72.9           33.2               13.1 +/-    1.08      21.6 +/-    1.08  0.030 / 0.040
G07     136.4          33.1               16.6 +/-    0.57      27.3 +/-    0.57  0.050 / 0.040
G11     56.1           33.3               11.3 +/-    1.79      18.6 +/-    1.79  0.050 / 0.080
G13     277.2          37.6               14.8 +/-    1.49      22.4 +/-    1.49  0.060 / 0.090
G15     304.0          15.0               10.3 +/-    1.88      25.7 +/-    1.88  0.240 / 0.260
G17     229.3          62.3               15.1 +/-    1.27      16.8 +/-    1.27  0.230 / 0.200
G18     50.9           19.4               11.9 +/-    3.33      26.6 +/-    3.33  0.030 / 0.030
G19     223.0          39.6               19.1 +/-    1.65      27.9 +/-    1.65  0.030 / 0.030
G28     17.2           59.6               13.1 +/-    0.73      14.9 +/-    0.73  0.050 / 0.070
G30     133.5          61.6               14.7 +/-    0.67      16.5 +/-    0.67  0.040 / 0.070