PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/28-16:28:00
G02     251.6          76.2                8.7 +/-    0.73       8.9 +/-    0.73  0.090 / 0.120
G05     170.7          19.7               11.3 +/-    2.00      25.1 +/-    2.00  0.090 / 0.140
G06     40.5           51.3                9.9 +/-    0.58      12.3 +/-    0.58  0.060 / 0.120
G12     322.6          62.2                8.0 +/-    0.96       8.9 +/-    0.96  0.080 / 0.120
G17     75.6           17.9                8.0 +/-    1.70      18.4 +/-    1.70  0.030 / 0.040
G19     58.8           38.9                9.3 +/-    1.72      13.8 +/-    1.72  0.030 / 0.040
G24     238.3          31.8                8.9 +/-    0.81      15.1 +/-    0.81  0.270 / 0.270
G25     317.3          17.2                8.0 +/-    2.78      18.7 +/-    2.78  0.170 / 0.250