PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-19:28:00
G10     259.9          32.9               15.2 +/-    1.29      25.0 +/-    1.29  0.140 / 0.360
G13     46.4           24.7               13.5 +/-    1.71      26.6 +/-    1.71  0.140 / 0.360
G15     67.3           52.8               14.2 +/-    0.46      17.4 +/-    0.46  0.040 / 0.050
G16     290.7          12.6               14.4 +/-    1.61      37.9 +/-    1.61  0.040 / 0.050
G18     288.1          62.3               14.2 +/-    0.55      15.8 +/-    0.55  0.120 / 0.500
G20     49.4           40.7               13.2 +/-    0.62      19.0 +/-    0.62  0.090 / 0.440
G21     354.8          69.0               14.9 +/-    0.88      15.8 +/-    0.88  0.080 / 0.170
G26     263.7          11.0               13.2 +/-    4.84      36.0 +/-    4.84  0.070 / 0.200
G27     320.5          14.8               12.0 +/-    2.29      30.1 +/-    2.29  0.040 / 0.080
G29     164.5          32.9               16.2 +/-    1.55      26.7 +/-    1.55  0.040 / 0.090