PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-22:58:00
G02     333.6          80.0               13.3 +/-    0.51      13.4 +/-    0.51  0.020 / 0.040
G05     164.4          32.0               19.8 +/-    1.12      33.3 +/-    1.12  0.030 / 0.040
G06     41.3           41.4               12.2 +/-    0.75      17.3 +/-    0.75  0.100 / 0.180
G12     314.2          70.1               12.9 +/-    0.83      13.6 +/-    0.83  0.100 / 0.240
G17     83.4           14.7               12.1 +/-    1.75      30.2 +/-    1.75  0.040 / 0.090
G19     71.9           30.2               13.3 +/-    0.56      23.1 +/-    0.56  0.040 / 0.090
G24     229.7          24.2               19.0 +/-    2.27      37.9 +/-    2.27  0.110 / 0.180
G25     317.6          26.3               12.2 +/-    2.58      23.1 +/-    2.58  0.080 / 0.150