PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-17:12:40
G01     41.6           16.7                8.0 +/-    0.71      19.2 +/-    0.71  0.100 / 0.370
G06     174.7          38.6               14.1 +/-    1.14      21.0 +/-    1.14  0.150 / 0.450
G13     240.3          22.7               11.8 +/-    2.10      24.2 +/-    2.10  0.050 / 0.120
G15     275.5          12.5               11.8 +/-    1.25      31.1 +/-    1.25  0.070 / 0.120
G17     6.5            69.5               12.1 +/-    0.99      12.9 +/-    0.99  0.160 / 0.230
G19     279.8          70.5               11.9 +/-    0.66      12.5 +/-    0.66  0.140 / 0.220
G24     317.6          17.0               11.9 +/-    4.84      28.2 +/-    4.84  0.030 / 0.040
G28     70.6           47.2                9.9 +/-    0.50      13.0 +/-    0.50  0.040 / 0.030
G30     154.7          30.8               13.2 +/-    0.63      22.8 +/-    0.63  0.100 / 0.260