PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-10:42:30
G02     18.5           67.4                2.4 +/-    0.95       2.6 +/-    0.95  0.050 / 0.050
G05     157.7          46.3                7.7 +/-    0.92      10.2 +/-    0.92  0.040 / 0.050
G12     268.7          78.7                3.3 +/-    0.91       3.4 +/-    0.91  0.130 / 0.350
G19     87.3           18.6                5.3 +/-    0.67      12.0 +/-    0.67  0.140 / 0.350
G24     220.2          14.2                3.5 +/-    3.28       8.8 +/-    3.28  0.030 / 0.020
G25     312.9          40.8                3.8 +/-    2.12       5.4 +/-    2.12  0.030 / 0.030
G29     297.4          19.9                2.3 +/-    1.22       5.1 +/-    1.22  0.050 / 0.090