PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-19:13:10
G07     119.3          45.7               15.6 +/-    0.52      20.8 +/-    0.52  0.030 / 0.030
G08     41.6           13.4                8.7 +/-    1.94      22.5 +/-    1.94  0.030 / 0.020
G11     76.7           42.1               13.7 +/-    0.62      19.2 +/-    0.62  0.080 / 0.140
G13     302.4          33.7               13.8 +/-    1.36      22.4 +/-    1.36  0.070 / 0.170
G17     208.5          46.1               17.2 +/-    0.74      22.8 +/-    0.74  0.060 / 0.130
G18     69.8           24.0               10.5 +/-    1.34      21.0 +/-    1.34  0.050 / 0.130
G19     210.8          20.2               17.5 +/-    3.90      38.4 +/-    3.90  0.220 / 0.320
G28     323.7          60.8               13.1 +/-    0.61      14.7 +/-    0.61  0.200 / 0.250
G30     75.5           78.8               15.1 +/-    0.95      15.4 +/-    0.95  0.050 / 0.050