PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-14:27:50
G07     41.4           69.8               10.6 +/-    0.53      11.2 +/-    0.53  0.050 / 0.050
G08     53.5           42.5                9.9 +/-    0.95      13.8 +/-    0.95  0.050 / 0.040
G09     177.7          38.7               10.5 +/-    1.14      15.6 +/-    1.14  0.030 / 0.030
G11     121.8          33.2               12.4 +/-    1.23      20.4 +/-    1.23  0.040 / 0.030
G17     199.9          10.8               -5.6 +/-   14.00     -15.4 +/-   14.00  0.030 / 0.040
G18     106.9          14.9               11.1 +/-    1.11      27.6 +/-    1.11  0.020 / 0.030
G27     37.7           10.0                8.5 +/-    5.59      23.6 +/-    5.59  0.210 / 0.260
G28     271.0          51.0                9.8 +/-    3.22      12.2 +/-    3.22  0.120 / 0.220
G30     328.6          57.4               10.1 +/-    0.51      11.7 +/-    0.51  0.060 / 0.060