PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-16:27:50
G01     51.7           26.2               10.0 +/-    1.94      18.9 +/-    1.94  0.080 / 0.260
G06     178.0          23.4               15.9 +/-    1.74      32.2 +/-    1.74  0.080 / 0.270
G07     145.1          11.1               11.7 +/-    3.20      31.9 +/-    3.20  0.130 / 0.160
G11     44.4           13.9                8.4 +/-    1.89      21.5 +/-    1.89  0.090 / 0.130
G13     254.8          31.4               13.9 +/-    1.96      23.7 +/-    1.96  0.050 / 0.060
G15     289.3          15.3               10.1 +/-    1.57      24.9 +/-    1.57  0.040 / 0.050
G17     317.8          79.4               13.4 +/-    0.41      13.6 +/-    0.41  0.140 / 0.190
G19     244.9          60.5               14.6 +/-    1.10      16.5 +/-    1.10  0.220 / 0.310
G28     49.5           53.6               13.9 +/-    0.75      16.8 +/-    0.75  0.030 / 0.020
G30     148.8          46.0               13.8 +/-    0.67      18.3 +/-    0.67  0.020 / 0.020