PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-18:28:00
G01     120.4          16.2               13.3 +/-    1.30      32.2 +/-    1.30  0.040 / 0.070
G07     85.6           62.4               11.4 +/-    0.35      12.7 +/-    0.35  0.040 / 0.070
G08     45.7           32.8                9.5 +/-    0.41      15.7 +/-    0.41  0.040 / 0.050
G09     177.9          29.5               13.2 +/-    1.25      23.3 +/-    1.25  0.030 / 0.050
G11     107.9          39.7               13.5 +/-    0.31      19.7 +/-    0.31  0.030 / 0.030
G13     318.3          18.5               10.7 +/-    1.65      24.3 +/-    1.65  0.030 / 0.050
G17     200.5          22.7               13.7 +/-    2.68      28.1 +/-    2.68  0.080 / 0.250
G18     94.2           19.9               12.5 +/-    0.73      27.6 +/-    0.73  0.080 / 0.240
G28     282.5          53.4               13.0 +/-    0.79      15.8 +/-    0.79  0.080 / 0.180
G30     346.4          68.3               10.9 +/-    0.63      11.6 +/-    0.63  0.080 / 0.200