PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-14:58:00
G10     245.6          21.6                5.8 +/-    2.00      12.2 +/-    2.00  0.040 / 0.050
G13     60.6           33.9                6.8 +/-    0.74      11.0 +/-    0.74  0.040 / 0.050
G15     96.4           57.0                8.8 +/-    0.47      10.3 +/-    0.47  0.040 / 0.050
G16     305.6          13.4                3.3 +/-    2.11       8.4 +/-    2.11  0.030 / 0.050
G18     262.1          53.9                8.6 +/-    0.96      10.4 +/-    0.96  0.120 / 0.190
G20     35.7           56.7                6.0 +/-    0.38       7.1 +/-    0.38  0.100 / 0.230
G21     333.6          60.0                6.7 +/-    0.64       7.6 +/-    0.64  0.040 / 0.100
G26     276.1          17.4                4.6 +/-    1.24      10.8 +/-    1.24  0.040 / 0.110
G29     160.7          52.6                9.0 +/-    1.17      11.0 +/-    1.17  0.130 / 0.370