PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-21:43:00
G02     200.1          22.1               15.9 +/-    1.76      33.2 +/-    1.76  0.070 / 0.120
G06     173.0          52.7               15.7 +/-    0.76      19.1 +/-    0.76  0.070 / 0.140
G13     225.6          12.7               15.4 +/-    4.21      40.3 +/-    4.21  0.060 / 0.050
G17     23.6           58.7               11.9 +/-    0.61      13.7 +/-    0.61  0.050 / 0.040
G19     326.6          71.0               12.0 +/-    0.91      12.6 +/-    0.91  0.050 / 0.090
G24     308.6          31.1               10.2 +/-    1.30      17.5 +/-    1.30  0.050 / 0.090
G28     85.7           42.8               13.1 +/-    0.32      18.2 +/-    0.32  0.070 / 0.170
G30     156.6          12.1               15.6 +/-    1.84      41.5 +/-    1.84  0.070 / 0.130