PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-09:13:10
G02     52.2           38.2                4.0 +/-    1.52       6.0 +/-    1.52  0.020 / 0.020
G05     79.9           67.7                4.7 +/-    0.56       5.1 +/-    0.56  0.020 / 0.020
G12     189.1          45.9                8.9 +/-    1.06      11.8 +/-    1.06  0.030 / 0.040
G20     205.2          43.3                7.9 +/-    0.67      10.9 +/-    0.67  0.040 / 0.040
G21     263.5          13.0                4.7 +/-    4.06      12.2 +/-    4.06  0.220 / 0.440
G25     257.7          57.4                6.4 +/-    2.22       7.4 +/-    2.22  0.220 / 0.360
G29     322.5          46.4                3.8 +/-    0.67       5.0 +/-    0.67  0.050 / 0.080