PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-21:12:50
G10     264.7          36.1               18.0 +/-    1.06      28.0 +/-    1.06  0.080 / 0.070
G13     43.6           21.3                9.8 +/-    2.16      20.8 +/-    2.16  0.130 / 0.070
G15     61.5           50.2               11.1 +/-    0.87      13.9 +/-    0.87  0.040 / 0.040
G16     284.9          11.7               19.5 +/-    2.44      52.4 +/-    2.44  0.040 / 0.030
G18     297.1          63.9               14.9 +/-    0.60      16.4 +/-    0.60  0.200 / 0.330
G20     53.2           36.2               11.3 +/-    1.27      17.6 +/-    1.27  0.200 / 0.310
G21     3.0            71.5               15.5 +/-    0.55      16.3 +/-    0.55  0.090 / 0.160
G24     123.1          12.7               13.9 +/-    2.18      36.6 +/-    2.18  0.110 / 0.150
G27     318.7          18.7               17.0 +/-    2.72      38.6 +/-    2.72  0.060 / 0.090
G29     165.8          28.8               16.6 +/-    1.57      29.9 +/-    1.57  0.090 / 0.080