PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-21:28:10
G02     199.2          10.7               -0.6 +/-   13.44      -1.7 +/-   13.44  0.150 / 0.270
G06     176.1          39.5               17.2 +/-    1.69      25.3 +/-    1.69  0.190 / 0.190
G13     234.6          20.7               17.2 +/-    2.16      37.2 +/-    2.16  0.050 / 0.050
G15     267.7          11.4               13.1 +/-    2.39      35.4 +/-    2.39  0.040 / 0.060
G17     8.0            68.2               10.3 +/-    0.67      11.0 +/-    0.67  0.100 / 0.180
G19     285.1          70.5               11.1 +/-    1.03      11.7 +/-    1.03  0.090 / 0.170
G24     315.1          22.1                8.1 +/-    2.74      16.9 +/-    2.74  0.040 / 0.030
G28     70.5           48.9               11.2 +/-    1.35      14.3 +/-    1.35  0.040 / 0.030
G30     154.7          23.5               17.4 +/-    3.62      35.3 +/-    3.62  0.120 / 0.330