PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-00:57:50
G02     29.0           59.0               11.1 +/-    0.59      12.8 +/-    0.59  0.030 / 0.040
G05     144.4          58.1               14.1 +/-    0.61      16.2 +/-    0.61  0.030 / 0.040
G06     51.3           19.2                8.1 +/-    2.40      18.1 +/-    2.40  0.040 / 0.040
G12     206.5          73.0               11.7 +/-    0.92      12.2 +/-    0.92  0.030 / 0.040
G19     95.4           14.2               12.6 +/-    1.07      32.0 +/-    1.07  0.030 / 0.050
G25     304.3          49.2               11.2 +/-    0.94      14.3 +/-    0.94  0.040 / 0.050
G29     303.3          23.4                9.8 +/-    1.53      19.9 +/-    1.53  0.070 / 0.190