PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/18-18:12:50
G10     248.4          25.2                8.4 +/-    1.80      16.3 +/-    1.80  0.040 / 0.060
G13     55.9           31.0                8.8 +/-    0.72      15.2 +/-    0.72  0.040 / 0.050
G15     98.7           59.4                9.0 +/-    0.38      10.3 +/-    0.38  0.140 / 0.630
G16     298.2          15.5                1.4 +/-    2.46       3.5 +/-    2.46  0.170 / 0.720
G20     266.4          49.1                7.7 +/-    1.29       9.8 +/-    1.29  0.050 / 0.120
G21     332.0          59.0                6.9 +/-    0.86       7.9 +/-    0.86  0.050 / 0.150
G26     271.0          16.4                8.7 +/-    1.67      20.8 +/-    1.67  0.030 / 0.030
G29     163.6          53.0                7.9 +/-    0.83       9.7 +/-    0.83  0.030 / 0.030