PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-14:28:00
G01     121.0          15.5                9.5 +/-    2.04      23.4 +/-    2.04  0.030 / 0.050
G07     80.7           64.3               10.0 +/-    0.73      10.9 +/-    0.73  0.030 / 0.050
G08     47.1           35.8                7.6 +/-    0.69      11.9 +/-    0.69  0.050 / 0.080
G09     178.0          30.7                9.2 +/-    1.67      16.0 +/-    1.67  0.050 / 0.090
G11     110.3          39.4               10.4 +/-    0.69      15.3 +/-    0.69  0.050 / 0.110
G13     318.7          17.9                6.8 +/-    1.95      15.7 +/-    1.95  0.050 / 0.110
G17     200.9          19.5               11.4 +/-    2.56      25.4 +/-    2.56  0.110 / 0.210
G18     96.2           19.5                9.2 +/-    0.95      20.5 +/-    0.95  0.100 / 0.240
G28     279.5          52.0               10.0 +/-    1.33      12.3 +/-    1.33  0.120 / 0.210
G30     346.4          68.1                6.9 +/-    1.03       7.4 +/-    1.03  0.100 / 0.240