PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-00:57:50
G10     247.9          23.4               12.5 +/-    1.42      25.3 +/-    1.42  0.100 / 0.330
G13     57.6           32.9                9.9 +/-    1.06      16.3 +/-    1.06  0.120 / 0.320
G15     98.0           58.7               12.4 +/-    1.14      14.3 +/-    1.14  0.150 / 0.300
G16     300.2          14.7                5.1 +/-    1.54      12.8 +/-    1.54  0.240 / 0.310
G18     263.3          52.6               11.0 +/-    2.53      13.4 +/-    2.53  0.100 / 0.100
G20     41.6           49.9                9.0 +/-    1.02      11.4 +/-    1.02  0.090 / 0.110
G21     329.2          57.9                8.1 +/-    0.61       9.3 +/-    0.61  0.030 / 0.040
G26     272.4          16.7               12.4 +/-    1.72      29.6 +/-    1.72  0.030 / 0.030
G29     163.3          51.5               12.3 +/-    0.55      15.2 +/-    0.55  0.040 / 0.040