PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-08:13:00
G10     256.6          31.1                7.0 +/-    2.76      12.0 +/-    2.76  0.090 / 0.310
G13     48.3           26.2                5.3 +/-    0.83      10.0 +/-    0.83  0.100 / 0.300
G15     72.1           54.3                7.2 +/-    0.38       8.7 +/-    0.38  0.030 / 0.040
G16     289.1          14.5                4.1 +/-    1.88      10.4 +/-    1.88  0.040 / 0.050
G20     27.2           61.3                5.7 +/-    0.45       6.4 +/-    0.45  0.160 / 0.380
G21     344.2          65.4                3.0 +/-    0.99       3.3 +/-    0.99  0.170 / 0.360
G26     260.7          12.7                6.2 +/-    1.33      16.4 +/-    1.33  0.040 / 0.050
G27     321.9          11.2               -5.1 +/-   26.00     -13.8 +/-   26.00  0.040 / 0.040
G29     166.3          41.9                8.2 +/-    1.01      11.6 +/-    1.01  0.090 / 0.110