PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-21:13:00
G01     51.5           26.3               10.3 +/-    2.28      19.6 +/-    2.28  0.100 / 0.150
G06     179.8          20.4               14.2 +/-    1.70      31.0 +/-    1.70  0.070 / 0.160
G11     44.7           16.0                9.3 +/-    3.10      22.7 +/-    3.10  0.050 / 0.050
G13     251.8          32.1               11.2 +/-    2.05      18.8 +/-    2.05  0.040 / 0.060
G15     284.9          16.1               11.2 +/-    1.64      27.0 +/-    1.64  0.040 / 0.050
G17     306.3          79.5               13.0 +/-    0.50      13.2 +/-    0.50  0.030 / 0.040
G19     242.6          58.4               12.5 +/-    1.67      14.4 +/-    1.67  0.060 / 0.060
G28     42.8           56.3               12.1 +/-    1.24      14.2 +/-    1.24  0.050 / 0.060
G30     148.4          42.1               11.9 +/-    1.35      16.7 +/-    1.35  0.130 / 0.110