PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-22:43:00
G10     261.0          33.6               20.0 +/-    1.32      32.5 +/-    1.32  0.050 / 0.050
G13     45.8           24.2               16.2 +/-    1.36      32.3 +/-    1.36  0.050 / 0.040
G15     67.2           53.3               18.8 +/-    0.43      22.9 +/-    0.43  0.120 / 0.510
G16     287.3          12.8               17.3 +/-    1.52      45.2 +/-    1.52  0.110 / 0.510
G18     288.5          61.9               18.7 +/-    0.84      20.8 +/-    0.84  0.170 / 0.390
G20     51.0           38.5               15.9 +/-    0.30      23.7 +/-    0.30  0.140 / 0.390
G21     352.6          68.8               18.4 +/-    1.14      19.6 +/-    1.14  0.080 / 0.090
G26     260.4          10.5               19.8 +/-    3.05      54.6 +/-    3.05  0.050 / 0.090
G27     320.1          15.8               15.0 +/-    3.11      36.5 +/-    3.11  0.170 / 0.320
G29     165.9          33.8               23.7 +/-    1.87      38.6 +/-    1.87  0.120 / 0.270