PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-16:57:40
G02     212.9          52.9               12.8 +/-    1.18      15.6 +/-    1.18  0.050 / 0.090
G06     74.0           77.9               11.1 +/-    0.71      11.4 +/-    0.71  0.050 / 0.080
G12     317.4          32.6               10.3 +/-    1.65      17.2 +/-    1.65  0.050 / 0.090
G17     55.8           32.8                9.4 +/-    0.40      15.6 +/-    0.40  0.040 / 0.070
G19     37.0           50.4               10.4 +/-    0.41      13.1 +/-    0.41  0.040 / 0.090
G24     273.9          42.0                9.7 +/-    0.92      13.7 +/-    0.92  0.040 / 0.090
G28     120.1          16.4                9.4 +/-    1.17      22.5 +/-    1.17  0.050 / 0.060