PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-14:43:10
G01     89.0           32.1               11.0 +/-    0.45      18.5 +/-    0.45  0.020 / 0.030
G07     126.4          44.7               12.9 +/-    1.00      17.4 +/-    1.00  0.030 / 0.030
G11     66.9           39.0                9.8 +/-    0.56      14.4 +/-    0.56  0.110 / 0.110
G13     293.3          36.4               10.4 +/-    1.35      16.1 +/-    1.35  0.100 / 0.110
G17     215.2          54.6               14.7 +/-    0.98      17.6 +/-    0.98  0.040 / 0.060
G18     62.5           23.5                9.0 +/-    0.77      18.2 +/-    0.77  0.040 / 0.060
G19     215.3          25.2               12.6 +/-    2.55      24.5 +/-    2.55  0.050 / 0.100
G28     350.8          61.7                9.0 +/-    0.83      10.0 +/-    0.83  0.050 / 0.100
G30     105.7          76.3               11.9 +/-    0.69      12.3 +/-    0.69  0.050 / 0.060