PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-19:43:00
G01     98.4           28.9               11.7 +/-    1.27      21.0 +/-    1.27  0.040 / 0.050
G07     119.4          45.8               13.4 +/-    0.63      17.9 +/-    0.63  0.040 / 0.050
G08     41.6           13.1                8.5 +/-    2.38      22.2 +/-    2.38  0.090 / 0.140
G11     76.4           42.0               10.9 +/-    1.98      15.4 +/-    1.98  0.080 / 0.130
G13     302.3          33.8               11.2 +/-    1.83      18.2 +/-    1.83  0.080 / 0.160
G17     208.5          46.5               14.5 +/-    0.53      19.2 +/-    0.53  0.100 / 0.160
G18     69.5           23.9                9.8 +/-    1.67      19.7 +/-    1.67  0.040 / 0.040
G19     210.9          20.3               14.7 +/-    6.21      32.1 +/-    6.21  0.050 / 0.050
G28     324.2          60.8               11.9 +/-    1.01      13.5 +/-    1.01  0.030 / 0.030
G30     75.2           78.9               13.4 +/-    0.58      13.6 +/-    0.58  0.030 / 0.030