PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-10:12:40
G10     272.4          40.9                3.4 +/-    1.57       4.9 +/-    1.57  0.140 / 0.120
G13     40.1           15.0                3.0 +/-    3.94       7.5 +/-    3.94  0.090 / 0.120
G15     53.8           43.6                5.0 +/-    0.95       6.9 +/-    0.95  0.040 / 0.040
G20     53.3           39.1                2.8 +/-    1.11       4.1 +/-    1.11  0.030 / 0.040
G21     22.1           75.0                3.2 +/-    0.73       3.3 +/-    0.73  0.080 / 0.080
G24     116.6          17.0                7.0 +/-    1.67      16.5 +/-    1.67  0.060 / 0.080
G27     315.6          23.4                3.5 +/-    0.95       7.0 +/-    0.95  0.230 / 0.570
G29     168.0          25.1                5.0 +/-    1.78       9.7 +/-    1.78  0.100 / 0.500
G32     204.9          14.7                4.2 +/-    3.02      10.5 +/-    3.02  0.130 / 0.200