PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-11:12:30
G10     275.9          42.7                3.2 +/-    1.14       4.5 +/-    1.14  0.200 / 0.140
G13     39.1           12.6                1.6 +/-    3.43       4.1 +/-    3.43  0.090 / 0.110
G15     51.6           40.9                3.4 +/-    0.57       4.9 +/-    0.57  0.040 / 0.030
G20     57.1           34.6                3.5 +/-    1.79       5.6 +/-    1.79  0.040 / 0.040
G21     35.8           76.1                4.2 +/-    1.13       4.4 +/-    1.13  0.060 / 0.100
G24     114.1          18.7                5.1 +/-    2.17      11.5 +/-    2.17  0.050 / 0.100
G27     313.7          25.6                2.1 +/-    2.14       4.0 +/-    2.14  0.150 / 0.170
G29     168.0          21.7                3.8 +/-    1.16       8.0 +/-    1.16  0.130 / 0.270
G32     205.6          17.3                4.7 +/-    2.17      11.1 +/-    2.17  0.050 / 0.040