PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-20:58:00
G02     200.5          23.2               17.7 +/-    3.10      36.1 +/-    3.10  0.160 / 0.140
G06     168.5          57.2               14.3 +/-    0.66      16.7 +/-    0.66  0.120 / 0.130
G13     225.8          11.6               16.1 +/-    1.52      43.4 +/-    1.52  0.150 / 0.240
G17     20.3           60.3               12.6 +/-    0.66      14.3 +/-    0.66  0.140 / 0.250
G19     324.6          70.4               12.4 +/-    0.40      13.0 +/-    0.40  0.050 / 0.030
G24     308.3          31.4               11.2 +/-    1.69      19.1 +/-    1.69  0.040 / 0.030
G28     90.6           38.3               13.3 +/-    1.29      20.0 +/-    1.29  0.030 / 0.030
G30     157.2          12.1               17.7 +/-    3.29      47.2 +/-    3.29  0.030 / 0.020