PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-21:12:50
G01     69.2           32.5               12.2 +/-    2.07      20.3 +/-    2.07  0.030 / 0.040
G07     137.6          24.5               14.9 +/-    2.46      29.5 +/-    2.46  0.030 / 0.030
G11     51.9           29.2               10.3 +/-    1.68      18.4 +/-    1.68  0.100 / 0.080
G13     272.3          38.1               13.0 +/-    2.28      19.5 +/-    2.28  0.110 / 0.080
G15     300.9          15.8                8.4 +/-    1.33      20.5 +/-    1.33  0.090 / 0.120
G17     234.7          71.2               14.9 +/-    0.63      15.7 +/-    0.63  0.060 / 0.140
G18     46.3           16.1                9.1 +/-    3.18      22.0 +/-    3.18  0.090 / 0.100
G19     224.2          43.0               -1.2 +/-    1.79      -1.6 +/-    1.79  0.050 / 0.070
G28     13.1           60.4               11.2 +/-    1.55      12.7 +/-    1.55  0.240 / 0.330
G30     136.7          59.6               13.7 +/-    0.41      15.6 +/-    0.41  0.100 / 0.320