PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-20:58:00
G01     68.4           32.4               11.9 +/-    2.03      19.8 +/-    2.03  0.100 / 0.140
G07     137.9          23.8               13.7 +/-    2.09      27.5 +/-    2.09  0.110 / 0.130
G11     51.5           28.8               10.0 +/-    1.89      17.9 +/-    1.89  0.050 / 0.050
G13     271.5          38.0               12.0 +/-    2.56      18.1 +/-    2.56  0.050 / 0.040
G15     300.3          15.9                8.2 +/-    1.03      19.9 +/-    1.03  0.060 / 0.110
G17     236.0          71.6               12.9 +/-    0.38      13.5 +/-    0.38  0.090 / 0.110
G18     45.9           15.8                9.3 +/-    2.35      22.7 +/-    2.35  0.030 / 0.040
G19     224.7          43.7               12.6 +/-    2.06      17.3 +/-    2.06  0.030 / 0.040
G28     14.2           60.4               11.4 +/-    1.33      12.9 +/-    1.33  0.120 / 0.110
G30     137.3          58.8               13.9 +/-    0.93      15.9 +/-    0.93  0.080 / 0.110