PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-14:42:40
G01     93.3           30.8               10.4 +/-    0.85      17.9 +/-    0.85  0.040 / 0.060
G07     123.1          44.6               12.4 +/-    1.27      16.8 +/-    1.27  0.040 / 0.050
G11     70.1           38.3               10.4 +/-    0.72      15.6 +/-    0.72  0.060 / 0.110
G13     299.8          33.6               10.0 +/-    0.93      16.4 +/-    0.93  0.070 / 0.140
G17     211.9          53.2               12.7 +/-    0.94      15.4 +/-    0.94  0.030 / 0.030
G19     213.1          26.1               12.0 +/-    2.57      22.9 +/-    2.57  0.030 / 0.030
G28     343.3          61.7                9.3 +/-    0.79      10.4 +/-    0.79  0.040 / 0.060
G30     80.9           79.5               11.7 +/-    1.07      11.9 +/-    1.07  0.040 / 0.060