PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-19:43:00
G10     249.9          26.4               10.4 +/-    2.72      19.6 +/-    2.72  0.160 / 0.760
G13     54.2           30.1                8.2 +/-    1.80      14.3 +/-    1.80  0.150 / 0.750
G15     96.9           59.9                9.6 +/-    1.87      10.9 +/-    1.87  0.040 / 0.050
G16     296.0          15.7                6.7 +/-    3.51      16.3 +/-    3.51  0.040 / 0.060
G20     268.7          50.3                7.8 +/-    1.75       9.8 +/-    1.75  0.080 / 0.180
G21     333.3          59.8                8.7 +/-    2.59       9.9 +/-    2.59  0.070 / 0.180
G26     268.7          15.9                9.9 +/-    4.65      24.2 +/-    4.65  0.030 / 0.050
G29     164.4          51.3                9.6 +/-    1.55      11.9 +/-    1.55  0.030 / 0.050