PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-23:58:00
G02     232.8          73.2               11.7 +/-    0.58      12.2 +/-    0.58  0.070 / 0.090
G05     172.5          13.2               16.7 +/-    2.18      43.3 +/-    2.18  0.070 / 0.100
G06     41.8           65.7                8.9 +/-    0.48       9.7 +/-    0.48  0.040 / 0.050
G12     320.4          45.0                9.9 +/-    0.41      13.4 +/-    0.41  0.050 / 0.060
G17     67.6           24.0               10.4 +/-    0.99      20.9 +/-    0.99  0.030 / 0.030
G19     52.8           40.9                9.4 +/-    1.24      13.5 +/-    1.24  0.030 / 0.030
G24     248.2          36.8               13.4 +/-    2.03      20.6 +/-    2.03  0.200 / 0.240