PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-00:27:50
G02     281.3          81.3                9.2 +/-    0.61       9.3 +/-    0.61  0.080 / 0.170
G05     167.9          23.6               13.0 +/-    1.17      26.1 +/-    1.17  0.090 / 0.130
G06     38.8           53.9                9.3 +/-    0.52      11.3 +/-    0.52  0.180 / 0.320
G12     320.1          56.8               10.6 +/-    1.16      12.4 +/-    1.16  0.180 / 0.220
G17     77.2           17.1                9.9 +/-    1.44      23.3 +/-    1.44  0.040 / 0.040
G19     64.4           33.5               10.3 +/-    2.54      16.9 +/-    2.54  0.030 / 0.040
G24     236.3          29.8               12.7 +/-    1.09      22.4 +/-    1.09  0.080 / 0.110
G25     317.3          19.6                7.5 +/-    1.32      16.6 +/-    1.32  0.070 / 0.110