PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-18:12:50
G01     100.3          28.1               12.9 +/-    1.11      23.6 +/-    1.11  0.040 / 0.030
G07     117.5          47.1               13.2 +/-    0.88      17.2 +/-    0.88  0.030 / 0.040
G08     41.6           15.2                8.3 +/-    1.74      20.5 +/-    1.74  0.040 / 0.040
G11     79.1           42.6               11.9 +/-    0.90      16.6 +/-    0.90  0.040 / 0.050
G13     304.0          32.9                9.5 +/-    2.13      15.7 +/-    2.13  0.050 / 0.050
G17     207.7          43.8               13.0 +/-    0.59      17.8 +/-    0.59  0.040 / 0.040
G18     71.9           24.1               11.5 +/-    1.43      22.9 +/-    1.43  0.060 / 0.120
G19     210.2          18.9               -2.1 +/-    8.74      -4.7 +/-    8.74  0.070 / 0.120
G28     319.8          60.4               10.4 +/-    0.75      11.8 +/-    0.75  0.120 / 0.160
G30     68.9           78.9               13.1 +/-    0.58      13.3 +/-    0.58  0.130 / 0.150