PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-21:13:00
G10     280.3          45.3               12.0 +/-    1.22      16.1 +/-    1.22  0.070 / 0.140
G15     52.2           44.3                8.6 +/-    0.78      11.7 +/-    0.78  0.080 / 0.150
G20     321.8          64.2                8.7 +/-    0.51       9.5 +/-    0.51  0.040 / 0.040
G21     42.7           76.9               10.8 +/-    0.80      11.1 +/-    0.80  0.030 / 0.050
G24     107.7          20.7               11.8 +/-    0.61      25.6 +/-    0.61  0.090 / 0.190
G27     312.7          26.3                8.8 +/-    1.05      16.6 +/-    1.05  0.110 / 0.210
G29     168.7          20.0               11.9 +/-    2.26      26.1 +/-    2.26  0.030 / 0.060
G32     206.1          20.7               10.6 +/-    1.20      22.9 +/-    1.20  0.050 / 0.060