PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-06:42:30
G02     33.0           55.9                4.4 +/-    0.94       5.1 +/-    0.94  0.040 / 0.040
G05     141.1          60.2                7.5 +/-    0.65       8.5 +/-    0.65  0.030 / 0.030
G06     51.7           19.9                3.4 +/-    3.27       7.5 +/-    3.27  0.020 / 0.020
G12     208.0          71.7                5.3 +/-    0.22       5.5 +/-    0.22  0.020 / 0.020
G19     98.0           11.4                6.3 +/-    2.10      17.0 +/-    2.10  0.120 / 0.230
G20     200.6          18.5                4.6 +/-    1.30      10.5 +/-    1.30  0.180 / 0.170
G25     301.6          50.8                4.6 +/-    1.95       5.8 +/-    1.95  0.180 / 0.440
G29     305.9          26.9                3.6 +/-    1.41       6.7 +/-    1.41  0.170 / 0.350