PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-16:28:00
G01     44.8           20.6                8.2 +/-    0.69      17.7 +/-    0.69  0.060 / 0.140
G06     176.1          32.7               11.5 +/-    1.45      19.0 +/-    1.45  0.070 / 0.140
G13     245.4          26.2               14.1 +/-    1.47      26.8 +/-    1.47  0.020 / 0.040
G15     280.3          14.0               11.0 +/-    1.21      28.0 +/-    1.21  0.040 / 0.040
G17     354.6          73.9               12.3 +/-    0.71      12.7 +/-    0.71  0.230 / 0.340
G19     263.9          67.4               12.6 +/-    0.87      13.5 +/-    0.87  0.210 / 0.330
G24     318.8          12.4                9.6 +/-    2.53      25.5 +/-    2.53  0.070 / 0.090
G28     63.1           49.8               11.1 +/-    0.95      14.1 +/-    0.95  0.060 / 0.090
G30     152.9          36.3               10.8 +/-    1.39      16.8 +/-    1.39  0.080 / 0.190