PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-07:12:30
G02     200.0          25.1                6.7 +/-    3.06      13.1 +/-    3.06  0.050 / 0.090
G06     176.1          52.7                7.2 +/-    0.86       8.8 +/-    0.86  0.080 / 0.080
G13     226.3          11.4                5.5 +/-    2.47      14.9 +/-    2.47  0.020 / 0.040
G17     25.8           57.2                5.6 +/-    0.99       6.6 +/-    0.99  0.040 / 0.030
G19     336.1          70.3                4.3 +/-    0.55       4.6 +/-    0.55  0.040 / 0.040
G24     309.0          30.5                4.6 +/-    0.71       7.9 +/-    0.71  0.030 / 0.030
G28     91.7           37.5                7.2 +/-    1.20      10.9 +/-    1.20  0.140 / 0.220
G30     156.8          10.4                7.1 +/-    3.26      19.8 +/-    3.26  0.120 / 0.140