PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-09:28:10
G02     237.5          76.1                5.2 +/-    0.34       5.3 +/-    0.34  0.130 / 0.170
G05     172.7          14.4                4.4 +/-    2.53      11.0 +/-    2.53  0.120 / 0.130
G12     321.2          48.4                3.0 +/-    0.65       3.8 +/-    0.65  0.030 / 0.040
G17     70.2           22.7                4.0 +/-    1.02       8.2 +/-    1.02  0.040 / 0.040
G19     56.5           38.8                3.5 +/-    0.96       5.3 +/-    0.96  0.070 / 0.120
G24     248.9          36.0                4.2 +/-    1.63       6.5 +/-    1.63  0.080 / 0.120
G25     316.4          10.9              -15.1 +/-   16.88     -41.2 +/-   16.88  0.110 / 0.150