PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/31-10:28:10
G02     219.9          64.8                8.7 +/-    1.22       9.5 +/-    1.22  0.040 / 0.040
G06     49.7           70.0                6.3 +/-    0.30       6.6 +/-    0.30  0.030 / 0.030
G12     320.0          42.3                5.7 +/-    1.74       8.0 +/-    1.74  0.070 / 0.100
G17     59.8           30.1                4.2 +/-    0.86       7.4 +/-    0.86  0.060 / 0.090
G19     45.2           44.9                5.0 +/-    0.59       6.8 +/-    0.59  0.110 / 0.360
G24     262.0          40.0                8.2 +/-    0.79      11.9 +/-    0.79  0.100 / 0.390
G28     123.0          18.0                7.2 +/-    1.04      16.6 +/-    1.04  0.050 / 0.060