PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/16-08:58:10
G10     247.5          23.6                5.8 +/-    1.22      11.7 +/-    1.22  0.080 / 0.360
G13     57.6           32.4                4.0 +/-    1.92       6.6 +/-    1.92  0.080 / 0.310
G15     91.7           57.1                6.2 +/-    1.30       7.2 +/-    1.30  0.030 / 0.040
G16     300.0          15.1                2.0 +/-    1.44       5.0 +/-    1.44  0.030 / 0.040
G20     28.3           62.0                3.4 +/-    0.45       3.7 +/-    0.45  0.100 / 0.090
G21     330.7          58.5                3.2 +/-    0.52       3.7 +/-    0.52  0.090 / 0.100
G26     270.9          17.0                6.0 +/-    1.66      14.3 +/-    1.66  0.030 / 0.040
G29     163.3          53.4                6.2 +/-    0.56       7.5 +/-    0.56  0.040 / 0.040