PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-23:58:00
G02     272.0          81.0               11.9 +/-    0.59      12.1 +/-    0.59  0.030 / 0.030
G05     168.2          22.8               20.3 +/-    4.59      41.8 +/-    4.59  0.020 / 0.040
G06     40.0           51.3               11.6 +/-    0.71      14.4 +/-    0.71  0.080 / 0.160
G12     320.9          59.1               12.6 +/-    0.58      14.4 +/-    0.58  0.070 / 0.100
G17     74.8           21.4               11.6 +/-    1.76      24.7 +/-    1.76  0.110 / 0.140
G19     62.7           35.8               10.0 +/-    1.19      15.6 +/-    1.19  0.170 / 0.180
G24     238.6          30.9               14.9 +/-    2.30      25.6 +/-    2.30  0.050 / 0.040
G25     317.6          17.2                9.4 +/-    1.64      22.2 +/-    1.64  0.040 / 0.050