PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-00:12:30
G02     215.6          61.4               14.2 +/-    0.80      15.9 +/-    0.80  0.030 / 0.020
G06     57.7           74.3               11.9 +/-    0.50      12.3 +/-    0.50  0.030 / 0.020
G12     318.6          35.9               11.4 +/-    1.71      17.8 +/-    1.71  0.090 / 0.070
G17     54.8           36.0               11.5 +/-    1.11      18.0 +/-    1.11  0.050 / 0.090
G19     38.3           49.9               11.1 +/-    1.81      14.0 +/-    1.81  0.090 / 0.090
G24     265.5          41.6               13.5 +/-    1.59      19.1 +/-    1.59  0.080 / 0.080
G28     122.8          13.3               15.8 +/-    1.77      41.0 +/-    1.77  0.180 / 0.280