PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-20:28:10
G06     181.5          12.4               21.2 +/-    3.81      56.2 +/-    3.81  0.080 / 0.140
G07     141.3          16.8               16.1 +/-    1.41      38.4 +/-    1.41  0.080 / 0.170
G11     47.7           23.3                8.3 +/-    1.41      17.0 +/-    1.41  0.050 / 0.050
G13     262.1          36.1               14.7 +/-    2.02      22.9 +/-    2.02  0.030 / 0.050
G15     293.4          16.6                9.8 +/-    2.19      23.4 +/-    2.19  0.040 / 0.050
G17     257.7          76.9               12.9 +/-    0.35      13.2 +/-    0.35  0.040 / 0.060
G18     41.1           11.6                9.1 +/-    1.83      24.4 +/-    1.83  0.070 / 0.110
G19     231.5          50.7               15.2 +/-    2.07      19.0 +/-    2.07  0.070 / 0.100
G28     27.3           58.9                9.7 +/-    0.59      11.1 +/-    0.59  0.300 / 0.330
G30     143.2          50.9               13.5 +/-    0.41      16.8 +/-    0.41  0.230 / 0.450