PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-11:13:10
G01     319.7          16.0                3.9 +/-    2.03       9.4 +/-    2.03  0.040 / 0.050
G08     263.7          14.1                5.2 +/-    2.86      13.1 +/-    2.86  0.030 / 0.050
G10     76.1           54.6                4.1 +/-    0.41       4.9 +/-    0.41  0.170 / 0.150
G11     306.5          20.7                3.0 +/-    1.38       6.5 +/-    1.38  0.170 / 0.090
G14     282.4          67.6                4.9 +/-    0.70       5.2 +/-    0.70  0.100 / 0.360
G18     307.1          37.8                4.2 +/-    1.41       6.3 +/-    1.41  0.130 / 0.310
G22     300.7          13.1                3.3 +/-    2.38       8.7 +/-    2.38  0.240 / 0.270
G31     174.9          41.3                5.0 +/-    1.02       7.1 +/-    1.02  0.110 / 0.160
G32     6.9            68.0                3.7 +/-    0.44       4.0 +/-    0.44  0.110 / 0.130