PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-18:12:40
G07     328.0          56.0               11.5 +/-    1.34      13.5 +/-    1.34  0.050 / 0.070
G08     110.4          51.4               13.7 +/-    0.59      17.0 +/-    0.59  0.050 / 0.090
G09     199.7          77.0               12.2 +/-    1.22      12.5 +/-    1.22  0.040 / 0.080
G11     149.0          10.9                9.1 +/-   28.23      24.8 +/-   28.23  0.050 / 0.070
G23     153.0          40.3               14.2 +/-    1.14      20.6 +/-    1.14  0.200 / 0.560
G27     57.4           32.7               10.2 +/-    0.61      16.8 +/-    0.61  0.240 / 0.640
G28     235.3          27.6               15.6 +/-    2.35      28.7 +/-    2.35  0.100 / 0.190
G30     300.7          34.7               12.0 +/-    0.76      19.1 +/-    0.76  0.090 / 0.250