PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-16:27:50
G07     37.0           69.8               11.5 +/-    1.01      12.2 +/-    1.01  0.240 / 0.180
G08     55.6           44.6               10.8 +/-    0.77      14.6 +/-    0.77  0.040 / 0.050
G09     178.5          40.9               12.7 +/-    1.31      18.2 +/-    1.31  0.030 / 0.040
G11     123.8          32.3               12.2 +/-    1.09      20.3 +/-    1.09  0.030 / 0.040
G18     108.3          14.2               12.9 +/-    1.47      32.6 +/-    1.47  0.040 / 0.050
G27     37.9           10.8               11.4 +/-    2.46      31.2 +/-    2.46  0.050 / 0.060
G28     269.4          50.4               11.6 +/-    0.82      14.5 +/-    0.82  0.060 / 0.080
G30     328.3          57.0               10.8 +/-    0.91      12.6 +/-    0.91  0.050 / 0.080