PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-21:12:50
G01     72.7           33.2               13.4 +/-    0.70      22.1 +/-    0.70  0.100 / 0.330
G07     136.5          33.0               16.0 +/-    0.75      26.4 +/-    0.75  0.150 / 0.370
G11     55.9           33.1               10.9 +/-    0.63      17.9 +/-    0.63  0.040 / 0.080
G13     276.9          37.6               14.7 +/-    1.12      22.3 +/-    1.12  0.050 / 0.070
G15     303.9          15.0               10.1 +/-    2.05      25.2 +/-    2.05  0.030 / 0.060
G17     229.6          62.8               16.9 +/-    2.01      18.8 +/-    2.01  0.040 / 0.050
G18     50.7           19.3               11.6 +/-    0.84      26.0 +/-    0.84  0.040 / 0.110
G19     223.1          39.6               17.3 +/-    0.93      25.3 +/-    0.93  0.060 / 0.100
G28     17.5           59.5               12.9 +/-    0.54      14.7 +/-    0.54  0.050 / 0.130
G30     133.7          61.6               16.2 +/-    1.19      18.2 +/-    1.19  0.060 / 0.130