PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-12:43:00
G10     248.5          24.4                5.4 +/-    0.59      10.7 +/-    0.59  0.050 / 0.040
G13     56.5           32.0                4.5 +/-    1.48       7.5 +/-    1.48  0.040 / 0.040
G15     88.5           56.8                6.9 +/-    0.60       8.1 +/-    0.60  0.040 / 0.040
G16     300.5          14.4                2.2 +/-    1.94       5.6 +/-    1.94  0.030 / 0.040
G18     268.1          56.9                6.9 +/-    1.81       8.1 +/-    1.81  0.190 / 0.410
G20     37.2           54.9                5.7 +/-    0.74       6.8 +/-    0.74  0.140 / 0.370
G21     335.6          61.0                4.8 +/-    0.81       5.4 +/-    0.81  0.120 / 0.370
G26     271.1          16.4                5.2 +/-    1.12      12.4 +/-    1.12  0.080 / 0.350
G29     162.8          50.0                8.0 +/-    0.40      10.0 +/-    0.40  0.100 / 0.100