PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-16:42:30
G10     248.0          23.7               12.2 +/-    1.27      24.5 +/-    1.27  0.050 / 0.040
G13     57.5           32.7                8.8 +/-    1.48      14.7 +/-    1.48  0.050 / 0.040
G15     90.6           57.1               11.5 +/-    1.03      13.4 +/-    1.03  0.050 / 0.040
G16     303.9          13.2                7.8 +/-    1.80      20.2 +/-    1.80  0.060 / 0.050
G18     266.0          55.5               11.3 +/-    1.55      13.4 +/-    1.55  0.190 / 0.400
G20     38.9           53.1                9.6 +/-    0.69      11.7 +/-    0.69  0.150 / 0.470
G21     336.0          61.2               10.5 +/-    0.56      11.8 +/-    0.56  0.120 / 0.320
G26     274.2          16.3               11.0 +/-    1.26      26.4 +/-    1.26  0.120 / 0.370
G29     161.2          47.9               12.8 +/-    0.54      16.5 +/-    0.54  0.040 / 0.090