PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-17:57:40
G05     46.1           26.5               11.5 +/-    2.59      21.6 +/-    2.59  0.060 / 0.120
G13     88.9           36.7               14.0 +/-    0.50      21.5 +/-    0.50  0.060 / 0.100
G15     134.7          46.0               17.0 +/-    1.03      22.5 +/-    1.03  0.040 / 0.050
G18     238.2          36.1               16.4 +/-    2.27      25.5 +/-    2.27  0.040 / 0.040
G20     15.6           75.6               14.0 +/-    0.82      14.4 +/-    0.82  0.050 / 0.090
G21     306.8          43.8               12.6 +/-    1.21      17.2 +/-    1.21  0.040 / 0.090
G25     202.5          16.7               18.0 +/-    1.16      42.9 +/-    1.16  0.090 / 0.240
G26     301.0          18.0               13.0 +/-    1.77      30.0 +/-    1.77  0.090 / 0.210
G29     141.7          75.5               15.8 +/-    0.44      16.2 +/-    0.44  0.080 / 0.200