PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-15:28:10
G02     219.0          59.9               10.3 +/-    1.07      11.7 +/-    1.07  0.050 / 0.070
G06     52.0           71.4               11.0 +/-    0.58      11.5 +/-    0.58  0.050 / 0.100
G12     318.7          37.8                8.8 +/-    1.15      13.3 +/-    1.15  0.050 / 0.080
G17     56.8           33.6                8.3 +/-    2.09      13.6 +/-    2.09  0.050 / 0.080
G19     43.4           46.1               10.6 +/-    1.27      14.1 +/-    1.27  0.030 / 0.020
G24     263.1          40.5                9.6 +/-    3.12      13.9 +/-    3.12  0.040 / 0.030
G28     122.4          17.7                9.3 +/-    1.93      21.6 +/-    1.93  0.040 / 0.060