PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-22:27:50
G02     63.3           30.2               10.6 +/-    1.90      18.6 +/-    1.90  0.030 / 0.040
G05     51.8           56.0                9.4 +/-    0.72      11.1 +/-    0.72  0.030 / 0.040
G12     181.6          24.7               14.1 +/-    0.76      27.8 +/-    0.76  0.200 / 0.290
G13     123.6          18.9               12.9 +/-    1.65      29.1 +/-    1.65  0.180 / 0.270
G15     162.6          15.5               14.2 +/-    2.74      34.8 +/-    2.74  0.110 / 0.110
G21     275.4          19.8               13.1 +/-    1.80      28.9 +/-    1.80  0.120 / 0.110
G25     229.0          47.7               11.9 +/-    3.53      15.4 +/-    3.53  0.090 / 0.260
G29     330.9          58.7               10.5 +/-    1.07      12.0 +/-    1.07  0.100 / 0.270