PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-12:27:30
G10     304.1          53.7                3.7 +/-    0.66       4.4 +/-    0.66  0.050 / 0.070
G14     212.0          14.8                2.8 +/-    4.02       7.1 +/-    4.02  0.060 / 0.100
G15     45.5           22.5                1.7 +/-    2.41       3.6 +/-    2.41  0.030 / 0.040
G20     72.8           20.0                2.7 +/-    1.66       5.9 +/-    1.66  0.040 / 0.040
G21     112.0          68.7                5.2 +/-    0.60       5.5 +/-    0.60  0.100 / 0.190
G24     93.0           28.2                4.2 +/-    1.57       7.6 +/-    1.57  0.100 / 0.240
G27     293.9          36.5                7.7 +/-    2.44      12.0 +/-    2.44  0.160 / 0.470
G32     212.9          37.5                5.6 +/-    2.07       8.5 +/-    2.07  0.180 / 0.430