PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-17:27:50
G02     24.9           62.2               13.8 +/-    0.73      15.3 +/-    0.73  0.080 / 0.060
G05     156.6          53.0               15.7 +/-    0.75      19.1 +/-    0.75  0.040 / 0.050
G06     50.0           22.3               10.7 +/-    4.08      22.3 +/-    4.08  0.020 / 0.020
G12     215.1          75.1               12.5 +/-    1.14      12.9 +/-    1.14  0.020 / 0.030
G19     95.3           12.5               14.3 +/-    2.40      37.8 +/-    2.40  0.030 / 0.050
G20     197.6          19.7               17.1 +/-    3.34      38.0 +/-    3.34  0.030 / 0.040
G25     303.6          51.3               13.2 +/-    4.80      16.4 +/-    4.80  0.090 / 0.160
G29     304.0          26.0               11.6 +/-    2.32      22.2 +/-    2.32  0.050 / 0.150