PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-00:12:50
G02     89.2           11.1                8.0 +/-    1.61      21.8 +/-    1.61  0.080 / 0.200
G05     45.9           27.5                6.8 +/-    1.49      12.6 +/-    1.49  0.110 / 0.210
G13     89.6           36.6               10.8 +/-    0.45      16.6 +/-    0.45  0.100 / 0.110
G15     140.1          44.3               13.4 +/-    1.40      18.3 +/-    1.40  0.050 / 0.110
G18     237.1          33.2               12.4 +/-    0.95      20.4 +/-    0.95  0.040 / 0.100
G20     20.9           74.2               10.9 +/-    0.59      11.2 +/-    0.59  0.040 / 0.080
G21     304.0          41.0                9.3 +/-    0.61      13.3 +/-    0.61  0.110 / 0.390
G25     200.5          15.7               12.4 +/-    0.82      30.4 +/-    0.82  0.110 / 0.380
G26     298.4          19.7                8.9 +/-    1.66      19.8 +/-    1.66  0.020 / 0.030
G29     142.3          80.9                8.9 +/-    0.78       9.0 +/-    0.78  0.020 / 0.040