PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-15:12:30
G02     213.0          54.9               14.2 +/-    0.76      16.9 +/-    0.76  0.040 / 0.060
G06     73.8           78.3               12.3 +/-    0.47      12.5 +/-    0.47  0.050 / 0.060
G12     317.4          32.4                8.9 +/-    1.34      14.8 +/-    1.34  0.100 / 0.110
G17     56.2           32.5                8.3 +/-    0.95      13.8 +/-    0.95  0.070 / 0.130
G19     37.5           50.1                9.6 +/-    1.81      12.1 +/-    1.81  0.040 / 0.110
G24     273.1          41.9               12.2 +/-    1.93      17.2 +/-    1.93  0.040 / 0.060
G28     120.5          15.9               13.3 +/-    2.58      32.4 +/-    2.58  0.060 / 0.070