PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-20:12:30
G02     206.6          44.3               12.5 +/-    1.34      17.0 +/-    1.34  0.070 / 0.180
G06     140.2          77.1               11.2 +/-    0.31      11.4 +/-    0.31  0.070 / 0.140
G12     311.1          20.4               10.9 +/-    1.80      23.7 +/-    1.80  0.060 / 0.080
G17     43.5           43.1                9.7 +/-    0.41      13.5 +/-    0.41  0.060 / 0.080
G19     19.5           58.9               10.8 +/-    0.41      12.4 +/-    0.41  0.130 / 0.250
G24     286.0          41.5                9.4 +/-    0.94      13.4 +/-    0.94  0.220 / 0.260
G28     108.6          29.4               10.3 +/-    1.45      18.2 +/-    1.45  0.050 / 0.080