PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-22:58:00
G01     38.3           11.2               12.2 +/-    4.90      33.1 +/-    4.90  0.040 / 0.050
G02     199.2          15.7               23.0 +/-    3.74      56.2 +/-    3.74  0.040 / 0.050
G06     173.0          46.9               16.3 +/-    1.21      21.4 +/-    1.21  0.160 / 0.210
G13     232.4          17.4               16.2 +/-    2.12      37.9 +/-    2.12  0.130 / 0.200
G17     2.9            68.2               13.2 +/-    0.79      14.1 +/-    0.79  0.300 / 0.300
G19     297.8          70.8               12.1 +/-    0.62      12.8 +/-    0.62  0.240 / 0.200
G24     313.8          24.7               10.2 +/-    1.66      20.2 +/-    1.66  0.040 / 0.080
G28     80.8           43.0               13.3 +/-    1.08      18.5 +/-    1.08  0.050 / 0.070
G30     155.7          19.2               19.1 +/-    2.33      42.9 +/-    2.33  0.100 / 0.130