PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-19:12:50
G01     67.5           32.1               12.2 +/-    1.80      20.5 +/-    1.80  0.030 / 0.040
G07     138.2          22.8               14.9 +/-    2.21      30.7 +/-    2.21  0.040 / 0.030
G11     51.3           28.6               10.3 +/-    1.84      18.6 +/-    1.84  0.100 / 0.130
G13     270.5          38.0               12.7 +/-    3.18      19.1 +/-    3.18  0.090 / 0.140
G15     299.6          16.0               10.1 +/-    2.42      24.5 +/-    2.42  0.040 / 0.040
G17     236.7          71.3               13.7 +/-    0.50      14.4 +/-    0.50  0.040 / 0.040
G18     45.7           15.8                9.9 +/-    1.70      24.2 +/-    1.70  0.130 / 0.140
G19     225.3          44.7               13.9 +/-    2.01      18.8 +/-    2.01  0.050 / 0.120
G28     14.5           60.4               11.5 +/-    1.30      13.0 +/-    1.30  0.180 / 0.330
G30     137.8          57.1               13.7 +/-    0.68      16.0 +/-    0.68  0.190 / 0.280