PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-23:57:50
G05     48.5           19.6                6.4 +/-    0.60      14.2 +/-    0.60  0.040 / 0.090
G10     236.6          11.8               13.3 +/-    3.88      35.8 +/-    3.88  0.060 / 0.080
G13     76.7           37.4                9.4 +/-    0.78      14.3 +/-    0.78  0.120 / 0.200
G15     127.3          52.0               12.1 +/-    0.54      14.9 +/-    0.54  0.120 / 0.190
G16     315.1          11.6                8.7 +/-    1.37      23.4 +/-    1.37  0.090 / 0.300
G18     245.5          41.3               11.9 +/-    1.30      16.9 +/-    1.30  0.080 / 0.300
G20     30.1           64.6               10.1 +/-    0.72      11.0 +/-    0.72  0.030 / 0.040
G21     313.0          47.3               10.8 +/-    1.14      14.0 +/-    1.14  0.020 / 0.080
G26     288.7          19.9               11.1 +/-    2.37      24.5 +/-    2.37  0.070 / 0.160
G29     155.5          69.5                9.7 +/-    1.14      10.3 +/-    1.14  0.070 / 0.150