PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-21:12:50
G01     103.7          27.3               12.1 +/-    1.28      22.6 +/-    1.28  0.160 / 0.260
G07     111.5          56.2               11.9 +/-    0.36      14.0 +/-    0.36  0.190 / 0.180
G08     42.2           21.6                8.2 +/-    2.86      17.4 +/-    2.86  0.030 / 0.020
G09     174.7          11.4               17.7 +/-    3.16      47.9 +/-    3.16  0.030 / 0.030
G11     86.9           43.4               13.2 +/-    0.79      18.2 +/-    0.79  0.070 / 0.120
G13     307.2          30.2               12.5 +/-    1.21      21.8 +/-    1.21  0.060 / 0.120
G17     208.5          37.1               13.1 +/-    1.31      20.0 +/-    1.31  0.040 / 0.040
G18     77.4           24.8               10.9 +/-    1.40      21.5 +/-    1.40  0.020 / 0.040
G28     325.6          61.5               10.4 +/-    0.78      11.6 +/-    0.78  0.060 / 0.120
G30     53.1           78.9               11.4 +/-    1.03      11.6 +/-    1.03  0.110 / 0.140