PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-15:12:40
G07     307.3          46.5               13.3 +/-    1.16      17.6 +/-    1.16  0.040 / 0.080
G08     129.7          40.9               14.5 +/-    1.21      20.8 +/-    1.21  0.050 / 0.080
G09     300.0          79.6               11.5 +/-    0.91      11.7 +/-    0.91  0.120 / 0.180
G16     42.2           21.8                8.4 +/-    1.30      17.6 +/-    1.30  0.100 / 0.160
G23     143.8          58.4               14.0 +/-    0.75      16.1 +/-    0.75  0.050 / 0.070
G27     77.9           37.2               11.0 +/-    0.71      16.8 +/-    0.71  0.040 / 0.080
G28     224.6          13.4               13.6 +/-    3.99      35.0 +/-    3.99  0.150 / 0.710
G30     286.7          23.0               11.9 +/-    1.15      24.3 +/-    1.15  0.190 / 0.710