PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-15:28:00
G02     201.7          23.2               12.0 +/-    2.37      24.4 +/-    2.37  0.070 / 0.110
G06     169.0          58.9               12.7 +/-    0.43      14.6 +/-    0.43  0.070 / 0.100
G13     225.7          10.3               12.0 +/-    3.51      33.2 +/-    3.51  0.080 / 0.280
G17     30.3           54.0                9.2 +/-    0.95      11.1 +/-    0.95  0.130 / 0.350
G19     344.9          69.4               10.2 +/-    0.82      10.8 +/-    0.82  0.040 / 0.050
G24     308.1          31.5                8.5 +/-    0.89      14.5 +/-    0.89  0.040 / 0.050
G28     93.6           36.6                9.5 +/-    0.96      14.7 +/-    0.96  0.040 / 0.040
G30     158.1          11.8               11.3 +/-    2.04      30.2 +/-    2.04  0.040 / 0.040