PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-03:42:30
G10     245.8          22.4               16.0 +/-    2.55      33.2 +/-    2.55  0.120 / 0.390
G13     59.5           33.0                9.1 +/-    2.18      15.0 +/-    2.18  0.190 / 0.360
G15     99.5           57.8               12.2 +/-    1.03      14.2 +/-    1.03  0.040 / 0.040
G16     300.6          15.7                9.5 +/-    3.40      23.2 +/-    3.40  0.030 / 0.040
G20     272.0          58.5               12.7 +/-    1.02      14.7 +/-    1.02  0.060 / 0.110
G21     326.2          55.7               11.1 +/-    0.30      13.2 +/-    0.30  0.080 / 0.130
G26     272.1          17.9               14.2 +/-    1.29      33.0 +/-    1.29  0.020 / 0.030
G29     163.4          57.5               13.1 +/-    0.49      15.2 +/-    0.49  0.030 / 0.030