PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-20:28:00
G03     248.0          70.2               10.4 +/-    0.36      11.0 +/-    0.36  0.080 / 0.050
G09     300.2          13.7                9.1 +/-    1.76      23.3 +/-    1.76  0.070 / 0.050
G14     95.6           18.2                9.9 +/-    0.90      22.7 +/-    0.90  0.090 / 0.240
G16     137.6          54.8               13.1 +/-    0.71      15.7 +/-    0.71  0.090 / 0.280
G22     198.3          60.4               12.3 +/-    0.49      14.0 +/-    0.49  0.040 / 0.050
G23     315.8          45.7               10.2 +/-    0.59      13.6 +/-    0.59  0.030 / 0.050
G26     77.6           53.7               10.3 +/-    0.76      12.4 +/-    0.76  0.140 / 0.160
G31     49.7           23.5                7.1 +/-    1.50      14.3 +/-    1.50  0.090 / 0.150