PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-11:58:10
G02     203.5          36.5                9.4 +/-    1.68      14.4 +/-    1.68  0.030 / 0.050
G06     163.7          69.2                8.1 +/-    1.18       8.6 +/-    1.18  0.040 / 0.050
G12     308.4          15.7                2.7 +/-    1.36       6.6 +/-    1.36  0.120 / 0.320
G17     39.6           46.2                2.9 +/-    0.48       3.9 +/-    0.48  0.130 / 0.400
G19     9.0            63.3                3.7 +/-    0.36       4.1 +/-    0.36  0.060 / 0.160
G24     297.9          37.8                5.3 +/-    0.91       8.1 +/-    0.91  0.050 / 0.160
G28     104.6          29.5                5.3 +/-    1.10       9.5 +/-    1.10  0.110 / 0.130