PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-10:27:40
G10     256.6          30.9                4.6 +/-    1.78       7.9 +/-    1.78  0.360 / 0.320
G13     48.4           26.4                3.0 +/-    2.25       5.6 +/-    2.25  0.380 / 0.370
G15     71.6           54.0                4.9 +/-    0.58       5.9 +/-    0.58  0.090 / 0.220
G16     290.1          14.3                3.2 +/-    1.34       8.1 +/-    1.34  0.090 / 0.200
G20     42.9           48.9                2.6 +/-    1.16       3.4 +/-    1.16  0.040 / 0.040
G21     346.4          66.1                3.9 +/-    0.51       4.2 +/-    0.51  0.050 / 0.050
G26     261.4          12.7                4.3 +/-    1.84      11.4 +/-    1.84  0.040 / 0.040
G27     321.8          11.4               -6.2 +/-   21.76     -16.9 +/-   21.76  0.040 / 0.040
G29     165.9          41.1                5.4 +/-    0.61       7.7 +/-    0.61  0.080 / 0.130