PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-10:57:50
G10     260.7          33.8                3.4 +/-    1.90       5.6 +/-    1.90  0.110 / 0.220
G13     45.5           23.5                3.5 +/-    2.54       7.1 +/-    2.54  0.100 / 0.190
G15     65.2           51.6                4.7 +/-    0.98       5.8 +/-    0.98  0.100 / 0.370
G16     286.1          13.4                3.7 +/-    1.41       9.5 +/-    1.41  0.120 / 0.300
G20     46.5           45.1                4.7 +/-    0.84       6.3 +/-    0.84  0.050 / 0.040
G21     354.6          69.0                5.4 +/-    0.43       5.7 +/-    0.43  0.050 / 0.040
G24     125.9          10.5               -3.1 +/-   26.48      -8.6 +/-   26.48  0.070 / 0.060
G27     320.6          14.9                1.4 +/-    1.68       3.5 +/-    1.68  0.070 / 0.060
G29     166.6          36.3                6.7 +/-    0.69      10.4 +/-    0.69  0.200 / 0.340