PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-16:58:10
G02     57.2           35.8                6.6 +/-    0.95      10.3 +/-    0.95  0.040 / 0.070
G05     62.5           65.1                7.6 +/-    0.54       8.3 +/-    0.54  0.040 / 0.070
G12     183.0          31.4                9.9 +/-    1.10      16.9 +/-    1.10  0.070 / 0.100
G13     128.2          14.8               11.8 +/-    3.03      29.6 +/-    3.03  0.050 / 0.120
G21     271.1          17.1                8.2 +/-    2.41      19.4 +/-    2.41  0.130 / 0.380
G25     233.0          51.9                8.8 +/-    0.98      10.8 +/-    0.98  0.170 / 0.370
G29     327.7          53.5                6.6 +/-    1.11       8.0 +/-    1.11  0.030 / 0.040