PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-19:12:50
G01     115.7          19.7               13.3 +/-    1.38      29.4 +/-    1.38  0.030 / 0.030
G07     95.8           59.3               13.7 +/-    0.34      15.6 +/-    0.34  0.040 / 0.040
G08     43.5           27.8               10.1 +/-    1.77      18.6 +/-    1.77  0.060 / 0.060
G09     177.1          23.9               14.2 +/-    0.79      28.5 +/-    0.79  0.050 / 0.060
G11     100.6          41.6               14.0 +/-    0.56      19.9 +/-    0.56  0.070 / 0.220
G13     315.7          22.8               10.5 +/-    1.93      21.7 +/-    1.93  0.130 / 0.200
G17     201.7          28.6               13.1 +/-    1.11      23.7 +/-    1.11  0.110 / 0.150
G18     88.3           21.7               11.9 +/-    1.49      25.1 +/-    1.49  0.100 / 0.160
G28     291.8          56.0               13.0 +/-    1.57      15.3 +/-    1.57  0.030 / 0.030
G30     356.9          72.4               13.8 +/-    0.86      14.4 +/-    0.86  0.030 / 0.030