PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-18:28:00
G01     123.4          13.9               14.1 +/-    2.13      36.1 +/-    2.13  0.030 / 0.030
G07     77.5           64.3               11.7 +/-    0.30      12.9 +/-    0.30  0.030 / 0.030
G08     47.6           35.8                9.8 +/-    1.19      15.3 +/-    1.19  0.080 / 0.120
G09     178.4          33.3               11.7 +/-    0.88      19.2 +/-    0.88  0.100 / 0.090
G11     112.4          38.1               12.2 +/-    0.80      18.3 +/-    0.80  0.030 / 0.030
G13     319.7          15.6               10.2 +/-    2.89      25.1 +/-    2.89  0.030 / 0.030
G17     199.8          19.1               12.0 +/-    1.74      27.1 +/-    1.74  0.160 / 0.280
G18     97.8           18.4               11.3 +/-    3.00      25.8 +/-    3.00  0.180 / 0.350
G28     276.9          51.5               12.0 +/-    2.13      14.8 +/-    2.13  0.110 / 0.190
G30     340.4          65.2               11.2 +/-    0.65      12.2 +/-    0.65  0.090 / 0.220