PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-21:12:50
G01     53.1           27.3                7.9 +/-    2.68      14.6 +/-    2.68  0.190 / 0.290
G06     180.2          18.6               16.1 +/-    4.89      36.7 +/-    4.89  0.160 / 0.310
G07     143.9          10.7               15.2 +/-    3.21      41.9 +/-    3.21  0.060 / 0.090
G11     45.2           17.6               10.2 +/-    2.67      23.7 +/-    2.67  0.080 / 0.080
G13     253.9          33.0               11.9 +/-    2.19      19.6 +/-    2.19  0.040 / 0.060
G15     286.7          16.4               11.5 +/-    1.58      27.8 +/-    1.58  0.040 / 0.050
G17     295.3          79.6               13.1 +/-    0.44      13.3 +/-    0.44  0.070 / 0.130
G19     239.9          56.8               12.1 +/-    3.43      14.2 +/-    3.43  0.070 / 0.140
G28     39.7           56.9               10.3 +/-    1.61      12.0 +/-    1.61  0.040 / 0.060
G30     147.4          44.0               12.3 +/-    0.77      16.8 +/-    0.77  0.060 / 0.070