PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-21:27:50
G01     73.5           33.2               14.8 +/-    0.80      24.3 +/-    0.80  0.050 / 0.070
G07     136.1          33.5               17.7 +/-    1.60      28.8 +/-    1.60  0.050 / 0.080
G11     56.5           33.6               11.4 +/-    0.59      18.6 +/-    0.59  0.080 / 0.130
G13     277.8          37.6               16.7 +/-    1.07      25.3 +/-    1.07  0.070 / 0.130
G15     304.4          14.9               11.7 +/-    2.66      29.1 +/-    2.66  0.050 / 0.120
G18     51.3           19.6               11.7 +/-    0.84      25.9 +/-    0.84  0.050 / 0.120
G19     222.6          39.1               21.0 +/-    2.26      30.9 +/-    2.26  0.030 / 0.050
G28     16.4           59.7               13.4 +/-    0.46      15.3 +/-    0.46  0.030 / 0.050
G30     133.0          62.0               16.2 +/-    1.02      18.1 +/-    1.02  0.040 / 0.090