PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-17:42:50
G01     121.9          15.0               11.1 +/-    0.98      27.7 +/-    0.98  0.050 / 0.070
G07     82.1           63.2               10.3 +/-    0.88      11.4 +/-    0.88  0.040 / 0.080
G08     46.7           34.6                8.5 +/-    0.49      13.6 +/-    0.49  0.040 / 0.110
G09     178.2          31.5               11.5 +/-    1.31      19.5 +/-    1.31  0.050 / 0.110
G11     110.3          39.0               12.4 +/-    0.86      18.3 +/-    0.86  0.030 / 0.040
G13     319.0          17.1                7.7 +/-    1.83      18.3 +/-    1.83  0.030 / 0.050
G17     200.2          20.6               12.8 +/-    1.65      27.8 +/-    1.65  0.140 / 0.280
G18     96.2           19.1               11.4 +/-    1.19      25.6 +/-    1.19  0.120 / 0.280
G28     279.5          52.3               11.2 +/-    0.50      13.7 +/-    0.50  0.080 / 0.230
G30     344.2          67.1                8.5 +/-    0.72       9.1 +/-    0.72  0.080 / 0.210