PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-19:57:50
G07     22.1           68.9               12.9 +/-    1.11      13.7 +/-    1.11  0.050 / 0.050
G08     64.2           50.4               11.9 +/-    1.25      15.0 +/-    1.25  0.050 / 0.050
G09     180.2          47.3               12.8 +/-    1.16      16.7 +/-    1.16  0.230 / 0.220
G11     129.9          28.8               14.2 +/-    1.61      25.5 +/-    1.61  0.100 / 0.300
G18     112.8          11.6               14.0 +/-    2.79      37.6 +/-    2.79  0.050 / 0.040
G23     159.0          13.4               14.0 +/-    1.96      36.0 +/-    1.96  0.040 / 0.030
G27     39.2           14.4                8.9 +/-    2.67      22.5 +/-    2.67  0.120 / 0.220
G28     263.0          47.7               14.1 +/-    3.91      18.3 +/-    3.91  0.120 / 0.190
G30     325.3          54.6               12.6 +/-    0.60      15.0 +/-    0.60  0.030 / 0.030