PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-21:43:10
G10     256.8          30.7               16.4 +/-    2.87      28.3 +/-    2.87  0.060 / 0.050
G13     48.8           27.2               11.8 +/-    0.85      21.9 +/-    0.85  0.040 / 0.050
G15     73.7           55.3               14.9 +/-    0.69      17.7 +/-    0.69  0.170 / 0.340
G16     292.1          13.5               11.7 +/-    1.88      30.3 +/-    1.88  0.160 / 0.420
G18     280.7          60.0               15.1 +/-    0.69      17.1 +/-    0.69  0.080 / 0.310
G20     47.8           42.3               13.3 +/-    0.47      18.6 +/-    0.47  0.120 / 0.370
G21     345.6          66.0               13.7 +/-    1.29      14.8 +/-    1.29  0.040 / 0.080
G26     264.9          12.5               15.1 +/-    1.28      39.8 +/-    1.28  0.040 / 0.090
G27     321.4          12.2               10.2 +/-    3.56      27.1 +/-    3.56  0.120 / 0.300
G29     164.8          38.0               18.2 +/-    0.86      27.3 +/-    0.86  0.150 / 0.320