PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-20:12:50
G01     88.1           32.3                9.8 +/-    1.59      16.4 +/-    1.59  0.090 / 0.240
G07     127.1          44.4               12.7 +/-    0.85      17.3 +/-    0.85  0.110 / 0.200
G11     68.0           39.9                9.9 +/-    1.07      14.5 +/-    1.07  0.090 / 0.110
G13     292.8          36.3               11.2 +/-    3.31      17.3 +/-    3.31  0.070 / 0.100
G15     314.2          10.7               -5.1 +/-   20.85     -14.1 +/-   20.85  0.120 / 0.140
G17     216.6          51.2               13.7 +/-    1.30      17.1 +/-    1.30  0.100 / 0.160
G18     62.4           23.7                8.6 +/-    0.96      17.2 +/-    0.96  0.050 / 0.050
G19     215.6          27.7               13.7 +/-    2.19      25.1 +/-    2.19  0.040 / 0.050
G28     353.4          61.6                9.3 +/-    0.74      10.4 +/-    0.74  0.040 / 0.030
G30     111.6          73.3               11.8 +/-    0.80      12.2 +/-    0.80  0.030 / 0.030