PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-17:28:00
G02     57.1           36.0               10.2 +/-    0.72      15.9 +/-    0.72  0.030 / 0.040
G05     61.8           64.6               11.8 +/-    0.64      12.9 +/-    0.64  0.030 / 0.040
G12     182.7          31.0               15.8 +/-    1.38      27.1 +/-    1.38  0.180 / 0.500
G13     128.1          14.9               16.1 +/-    2.12      40.2 +/-    2.12  0.150 / 0.390
G21     271.1          17.1               13.2 +/-    1.96      31.3 +/-    1.96  0.050 / 0.100
G25     233.3          51.8               13.8 +/-    1.12      17.1 +/-    1.12  0.050 / 0.140
G29     327.7          53.5                9.8 +/-    1.04      11.9 +/-    1.04  0.040 / 0.070