PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-22:43:10
G02     200.1          22.0               15.6 +/-    1.79      32.6 +/-    1.79  0.080 / 0.230
G06     173.9          51.9               12.9 +/-    0.99      15.9 +/-    0.99  0.090 / 0.120
G13     225.8          12.8               11.4 +/-   22.11      29.8 +/-   22.11  0.030 / 0.040
G17     24.0           58.4               10.6 +/-    0.55      12.2 +/-    0.55  0.040 / 0.030
G19     325.2          71.1               10.2 +/-    0.44      10.7 +/-    0.44  0.100 / 0.430
G24     308.5          31.2                9.1 +/-    1.91      15.6 +/-    1.91  0.080 / 0.260
G28     85.7           42.7               12.0 +/-    1.35      16.7 +/-    1.35  0.040 / 0.050
G30     156.8          12.7               13.7 +/-    1.28      36.0 +/-    1.28  0.040 / 0.050