PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/20-18:28:00
G10     257.6          32.4               10.0 +/-    3.00      16.7 +/-    3.00  0.040 / 0.050
G13     47.2           24.8                9.2 +/-    0.90      18.0 +/-    0.90  0.040 / 0.050
G15     76.6           57.5                8.8 +/-    0.48      10.2 +/-    0.48  0.110 / 0.430
G16     288.0          14.6                6.8 +/-    2.05      17.1 +/-    2.05  0.110 / 0.320
G20     281.2          55.6               10.3 +/-    0.67      12.2 +/-    0.67  0.060 / 0.160
G21     346.7          66.2                8.3 +/-    0.54       9.0 +/-    0.54  0.070 / 0.210
G26     261.4          12.2                7.7 +/-    4.85      20.5 +/-    4.85  0.040 / 0.040
G29     166.2          41.3               11.9 +/-    0.60      16.9 +/-    0.60  0.030 / 0.040