PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-19:13:00
G10     247.5          23.2               14.7 +/-    2.10      29.9 +/-    2.10  0.040 / 0.050
G13     58.3           33.2               11.8 +/-    0.70      19.5 +/-    0.70  0.030 / 0.040
G15     93.3           57.4               13.4 +/-    0.56      15.6 +/-    0.56  0.140 / 0.410
G16     304.1          13.3               11.5 +/-    1.43      29.8 +/-    1.43  0.130 / 0.450
G18     264.4          54.3               14.2 +/-    0.72      17.1 +/-    0.72  0.040 / 0.050
G20     39.6           52.4               12.0 +/-    0.54      14.7 +/-    0.54  0.040 / 0.050
G21     332.3          59.5               13.6 +/-    1.19      15.6 +/-    1.19  0.110 / 0.320
G26     276.6          16.3               12.6 +/-    2.16      30.5 +/-    2.16  0.110 / 0.360
G29     160.9          48.4               15.2 +/-    1.04      19.6 +/-    1.04  0.050 / 0.140