PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-17:57:30
G02     200.6          21.1               13.6 +/-    1.88      29.1 +/-    1.88  0.070 / 0.080
G06     170.3          54.5               13.1 +/-    0.52      15.8 +/-    0.52  0.060 / 0.070
G13     225.3          12.7               10.9 +/-    6.65      28.7 +/-    6.65  0.140 / 0.310
G17     20.6           60.3               11.0 +/-    0.90      12.5 +/-    0.90  0.130 / 0.220
G19     329.3          71.1               10.0 +/-    0.31      10.5 +/-    0.31  0.120 / 0.120
G24     309.1          30.2               10.4 +/-    1.03      18.1 +/-    1.03  0.080 / 0.120
G28     85.0           43.6               12.5 +/-    0.89      17.2 +/-    0.89  0.030 / 0.040
G30     156.4          11.4               14.8 +/-    3.45      40.0 +/-    3.45  0.040 / 0.040