PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-20:58:10
G06     178.3          27.2               15.3 +/-    1.34      28.4 +/-    1.34  0.070 / 0.080
G11     43.5           10.6               10.7 +/-    1.75      29.4 +/-    1.75  0.060 / 0.100
G13     245.0          28.3               15.2 +/-    2.10      27.6 +/-    2.10  0.210 / 0.360
G15     278.5          14.9               13.2 +/-    1.82      32.9 +/-    1.82  0.360 / 0.430
G17     338.0          76.8               14.7 +/-    0.44      15.0 +/-    0.44  0.090 / 0.160
G19     254.2          63.8               15.1 +/-    0.71      16.6 +/-    0.71  0.150 / 0.230
G24     318.3          12.6               10.3 +/-    2.96      27.3 +/-    2.96  0.040 / 0.040
G28     53.3           54.0               12.3 +/-    1.42      14.8 +/-    1.42  0.040 / 0.040
G30     151.2          35.1               13.8 +/-    1.33      21.9 +/-    1.33  0.150 / 0.230