PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-14:28:00
G01     88.8           32.1               10.4 +/-    0.50      17.4 +/-    0.50  0.030 / 0.030
G07     126.6          44.5               10.9 +/-    0.87      14.7 +/-    0.87  0.030 / 0.030
G11     66.7           38.9                9.1 +/-    0.55      13.5 +/-    0.55  0.090 / 0.110
G13     293.1          36.5                9.2 +/-    1.28      14.2 +/-    1.28  0.100 / 0.110
G17     215.3          55.0               12.3 +/-    0.65      14.7 +/-    0.65  0.050 / 0.090
G18     62.3           23.4                9.4 +/-    1.09      19.0 +/-    1.09  0.040 / 0.090
G19     215.4          25.3                9.4 +/-    2.52      18.2 +/-    2.52  0.050 / 0.050
G28     351.1          61.7                8.2 +/-    0.76       9.2 +/-    0.76  0.060 / 0.050
G30     106.1          76.3               10.3 +/-    0.73      10.6 +/-    0.73  0.050 / 0.060