PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-07:27:40
G10     267.7          38.4                7.8 +/-    1.20      11.7 +/-    1.20  0.180 / 0.530
G13     41.7           18.1                3.1 +/-    0.95       7.2 +/-    0.95  0.160 / 0.490
G15     57.9           47.5                4.0 +/-    0.42       5.2 +/-    0.42  0.170 / 0.210
G16     278.1          11.7                5.5 +/-    3.31      14.8 +/-    3.31  0.170 / 0.280
G20     27.4           60.5                5.1 +/-    0.45       5.8 +/-    0.45  0.080 / 0.070
G21     5.2            72.4                5.8 +/-    0.87       6.0 +/-    0.87  0.070 / 0.070
G24     119.9          14.6                6.1 +/-    1.69      15.2 +/-    1.69  0.130 / 0.300
G27     318.0          20.0                4.5 +/-    1.41      10.0 +/-    1.41  0.150 / 0.230
G29     168.1          30.4                5.6 +/-    1.12       9.8 +/-    1.12  0.040 / 0.040
G32     204.1          11.1               -4.3 +/-   32.07     -11.8 +/-   32.07  0.040 / 0.040