PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-18:58:00
G07     108.5          53.2               12.4 +/-    0.91      15.0 +/-    0.91  0.030 / 0.040
G08     41.9           21.1               10.4 +/-    3.17      22.3 +/-    3.17  0.030 / 0.040
G09     175.8          16.4               15.8 +/-    2.22      37.9 +/-    2.22  0.040 / 0.060
G11     89.4           43.0               13.6 +/-    0.56      18.9 +/-    0.56  0.060 / 0.060
G13     310.4          28.4                9.8 +/-    1.81      17.7 +/-    1.81  0.030 / 0.030
G17     204.3          36.6               14.8 +/-    0.94      22.8 +/-    0.94  0.030 / 0.030
G18     79.8           23.5               12.7 +/-    2.09      25.7 +/-    2.09  0.170 / 0.360
G19     208.1          11.9               -0.9 +/-   16.17      -2.3 +/-   16.17  0.080 / 0.190
G28     306.0          58.7               11.3 +/-    0.92      12.9 +/-    0.92  0.070 / 0.170
G30     25.0           77.8               11.8 +/-    1.05      12.1 +/-    1.05  0.080 / 0.200