PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-19:42:50
G01     96.3           29.6               13.8 +/-    0.94      24.4 +/-    0.94  0.090 / 0.140
G07     121.2          44.2               15.7 +/-    0.99      21.4 +/-    0.99  0.060 / 0.140
G08     41.7           11.6               11.3 +/-    1.83      30.6 +/-    1.83  0.030 / 0.070
G11     74.0           41.5               15.1 +/-    0.88      21.4 +/-    0.88  0.030 / 0.070
G13     300.3          34.7               13.2 +/-    1.35      21.0 +/-    1.35  0.030 / 0.040
G17     209.6          48.4               14.8 +/-    1.72      19.1 +/-    1.72  0.030 / 0.030
G18     67.5           23.8               13.1 +/-    0.74      26.3 +/-    0.74  0.070 / 0.150
G19     211.6          22.0               14.4 +/-    1.18      30.1 +/-    1.18  0.120 / 0.150
G28     327.9          61.1               11.8 +/-    1.00      13.3 +/-    1.00  0.070 / 0.120
G30     85.0           78.1               14.0 +/-    0.96      14.3 +/-    0.96  0.060 / 0.120