PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-14:27:50
G10     248.5          25.5                6.5 +/-    1.26      12.6 +/-    1.26  0.040 / 0.050
G13     55.7           30.8                5.7 +/-    1.68       9.7 +/-    1.68  0.040 / 0.040
G15     93.9           58.4                5.3 +/-    0.80       6.1 +/-    0.80  0.100 / 0.160
G16     299.7          15.0                1.2 +/-    2.56       3.0 +/-    2.56  0.130 / 0.170
G20     266.7          49.3                7.1 +/-    4.21       9.1 +/-    4.21  0.110 / 0.120
G21     335.5          60.6                4.0 +/-    0.76       4.5 +/-    0.76  0.060 / 0.140
G26     273.0          16.1                3.9 +/-    1.22       9.5 +/-    1.22  0.030 / 0.040
G29     162.5          51.3                8.6 +/-    0.66      10.7 +/-    0.66  0.040 / 0.030