PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-21:12:50
G01     88.8           32.2               12.7 +/-    1.07      21.3 +/-    1.07  0.190 / 0.130
G07     126.5          45.0               14.2 +/-    0.60      19.1 +/-    0.60  0.090 / 0.290
G08     42.8           10.3                9.9 +/-    1.24      27.4 +/-    1.24  0.100 / 0.040
G11     69.1           40.4               12.7 +/-    1.51      18.3 +/-    1.51  0.100 / 0.040
G13     293.6          36.1               14.1 +/-    3.83      22.0 +/-    3.83  0.060 / 0.020
G17     216.2          49.9               14.6 +/-    1.13      18.5 +/-    1.13  0.070 / 0.030
G18     63.1           23.9               10.9 +/-    1.17      21.9 +/-    1.17  0.070 / 0.140
G19     215.3          27.4               17.2 +/-    2.23      31.8 +/-    2.23  0.080 / 0.160
G28     352.3          61.6               11.9 +/-    0.42      13.4 +/-    0.42  0.030 / 0.010
G30     110.5          73.3               14.2 +/-    1.17      14.8 +/-    1.17  0.030 / 0.010