PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-18:12:30
G10     256.4          31.6               12.8 +/-    2.54      21.6 +/-    2.54  0.050 / 0.050
G13     48.0           25.6               11.4 +/-    1.43      22.0 +/-    1.43  0.040 / 0.050
G15     78.7           57.8                6.8 +/-    0.56       7.9 +/-    0.56  0.130 / 0.490
G16     289.3          14.8                6.5 +/-    2.72      16.2 +/-    2.72  0.120 / 0.400
G20     279.3          54.9                9.2 +/-    0.86      10.9 +/-    0.86  0.080 / 0.210
G21     344.9          65.4                6.3 +/-    0.88       6.8 +/-    0.88  0.080 / 0.210
G26     262.6          12.8                8.4 +/-    1.35      22.2 +/-    1.35  0.030 / 0.040
G29     165.9          42.5               11.4 +/-    2.09      16.0 +/-    2.09  0.030 / 0.040