PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-20:58:00
G02     300.2          81.1                9.0 +/-    0.65       9.1 +/-    0.65  0.090 / 0.170
G05     166.7          27.4               11.0 +/-    1.31      20.4 +/-    1.31  0.080 / 0.180
G06     40.6           45.0                7.9 +/-    0.68      10.6 +/-    0.68  0.040 / 0.120
G12     318.4          67.0                6.7 +/-    0.95       7.2 +/-    0.95  0.070 / 0.120
G17     80.4           16.1                9.8 +/-    2.35      23.7 +/-    2.35  0.030 / 0.050
G19     67.3           33.3                9.8 +/-    0.96      16.0 +/-    0.96  0.030 / 0.050
G24     232.8          27.0               12.3 +/-    0.86      22.9 +/-    0.86  0.040 / 0.040
G25     317.8          22.8                8.0 +/-    1.44      16.4 +/-    1.44  0.030 / 0.030