PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-22:12:30
G02     212.5          56.2               14.9 +/-    1.47      17.5 +/-    1.47  0.040 / 0.080
G06     70.2           76.9               11.6 +/-    0.64      11.9 +/-    0.64  0.040 / 0.070
G12     317.3          32.9               10.3 +/-    0.68      17.0 +/-    0.68  0.050 / 0.080
G17     52.0           37.5                9.0 +/-    0.68      13.6 +/-    0.68  0.040 / 0.070
G19     32.0           53.2               11.4 +/-    0.45      13.8 +/-    0.45  0.040 / 0.060
G24     271.0          42.4               12.6 +/-    1.08      17.7 +/-    1.08  0.040 / 0.060
G28     119.7          16.7               12.5 +/-    2.32      29.8 +/-    2.32  0.050 / 0.050