PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-00:43:10
G10     255.5          30.6               13.4 +/-    1.62      23.2 +/-    1.62  0.040 / 0.040
G13     48.9           26.5                9.9 +/-    3.14      18.6 +/-    3.14  0.040 / 0.040
G15     79.0           57.4               11.5 +/-    0.75      13.3 +/-    0.75  0.190 / 0.410
G16     288.8          15.3                9.9 +/-    2.25      24.4 +/-    2.25  0.110 / 0.430
G20     265.7          39.2               16.5 +/-    3.36      24.3 +/-    3.36  0.150 / 0.160
G21     339.6          63.4               11.0 +/-    0.61      12.2 +/-    0.61  0.110 / 0.130
G26     261.2          13.3               10.5 +/-    3.29      27.3 +/-    3.29  0.030 / 0.030
G29     166.6          44.8               12.1 +/-    0.76      16.4 +/-    0.76  0.040 / 0.030