PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/21-18:43:00
G10     266.3          38.1               10.8 +/-    1.83      16.3 +/-    1.83  0.290 / 0.560
G13     42.2           18.6               10.5 +/-    3.69      23.8 +/-    3.69  0.220 / 0.530
G15     62.9           52.5               10.3 +/-    0.82      12.6 +/-    0.82  0.150 / 0.230
G16     279.8          12.4               10.3 +/-    1.44      27.2 +/-    1.44  0.190 / 0.210
G20     296.2          60.0               10.5 +/-    0.86      12.0 +/-    0.86  0.040 / 0.030
G21     4.0            71.7               11.8 +/-    0.91      12.3 +/-    0.91  0.040 / 0.030
G24     117.9          14.1               12.1 +/-    2.72      30.8 +/-    2.72  0.120 / 0.310
G27     319.7          16.9               11.8 +/-    2.52      27.9 +/-    2.52  0.140 / 0.250
G29     167.6          32.0               11.8 +/-    1.19      19.9 +/-    1.19  0.180 / 0.360