PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-15:28:10
G07     307.1          46.4               14.9 +/-    1.06      19.6 +/-    1.06  0.040 / 0.080
G08     130.1          40.7               15.4 +/-    1.27      22.1 +/-    1.27  0.050 / 0.070
G09     300.8          79.3               13.3 +/-    0.78      13.5 +/-    0.78  0.050 / 0.090
G16     42.1           22.0                9.7 +/-    0.80      20.3 +/-    0.80  0.050 / 0.080
G23     143.6          58.3               15.2 +/-    0.81      17.5 +/-    0.81  0.090 / 0.470
G27     78.1           37.2               11.7 +/-    0.90      17.9 +/-    0.90  0.190 / 0.520
G28     224.5          13.3               13.8 +/-    3.93      35.7 +/-    3.93  0.090 / 0.180
G30     286.6          23.0               14.3 +/-    0.78      29.3 +/-    0.78  0.120 / 0.190