PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-08:57:50
G02     65.2           27.1                1.5 +/-    0.95       2.8 +/-    0.95  0.040 / 0.060
G05     51.5           55.1                2.3 +/-    0.50       2.7 +/-    0.50  0.040 / 0.050
G12     185.0          28.1                5.2 +/-    2.66       9.6 +/-    2.66  0.030 / 0.050
G13     124.7          18.8                4.3 +/-    2.60       9.6 +/-    2.60  0.040 / 0.040
G15     159.5          17.1                4.6 +/-    1.30      10.8 +/-    1.30  0.080 / 0.220
G20     214.1          60.4                6.5 +/-    0.61       7.3 +/-    0.61  0.100 / 0.210
G21     276.5          22.6                3.3 +/-    1.62       6.7 +/-    1.62  0.120 / 0.360
G25     230.7          48.0                5.9 +/-    1.68       7.6 +/-    1.68  0.130 / 0.390
G29     333.5          61.4                3.6 +/-    0.69       4.0 +/-    0.69  0.110 / 0.120