PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/01-18:28:00
G02     71.6           23.0               15.4 +/-    1.04      31.4 +/-    1.04  0.060 / 0.160
G05     47.0           51.1               15.5 +/-    1.15      19.3 +/-    1.15  0.060 / 0.190
G12     182.4          17.8               21.7 +/-    1.55      50.2 +/-    1.55  0.060 / 0.100
G13     117.3          25.1               18.9 +/-    0.79      36.9 +/-    0.79  0.060 / 0.100
G15     155.3          24.3               24.0 +/-    1.03      47.7 +/-    1.03  0.130 / 0.220
G18     223.0          14.2               19.6 +/-    4.30      49.8 +/-    4.30  0.080 / 0.160
G20     222.4          76.6               20.2 +/-    0.74      20.7 +/-    0.74  0.040 / 0.050
G21     284.1          27.9               16.2 +/-    1.01      29.7 +/-    1.01  0.040 / 0.040
G25     216.9          38.5               21.9 +/-    2.08      32.6 +/-    2.08  0.030 / 0.050
G29     347.5          74.0               19.0 +/-    0.67      19.7 +/-    0.67  0.030 / 0.050