PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-16:57:40
G01     42.3           17.6                9.1 +/-    0.77      21.2 +/-    0.77  0.090 / 0.240
G06     175.1          37.3               16.8 +/-    1.20      25.7 +/-    1.20  0.100 / 0.290
G13     241.4          23.5               12.9 +/-    1.74      26.1 +/-    1.74  0.060 / 0.100
G15     276.5          12.9               12.9 +/-    1.77      33.7 +/-    1.77  0.050 / 0.100
G17     4.3            70.5               14.8 +/-    0.77      15.6 +/-    0.77  0.170 / 0.440
G19     275.9          69.9               14.1 +/-    0.90      14.9 +/-    0.90  0.170 / 0.350
G24     317.9          16.0                9.7 +/-    2.84      23.5 +/-    2.84  0.030 / 0.040
G28     69.0           47.8               12.8 +/-    0.52      16.6 +/-    0.52  0.030 / 0.040
G30     154.3          32.0               15.7 +/-    0.61      26.3 +/-    0.61  0.090 / 0.170