PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-23:27:40
G02     228.1          70.8               13.9 +/-    0.60      14.7 +/-    0.60  0.060 / 0.080
G05     173.4          11.2               10.1 +/-   38.51      27.5 +/-   38.51  0.060 / 0.090
G06     43.7           67.9               12.2 +/-    0.43      13.0 +/-    0.43  0.030 / 0.030
G12     320.0          42.6               13.1 +/-    1.52      18.2 +/-    1.52  0.040 / 0.040
G17     65.5           25.7               11.1 +/-    0.58      21.5 +/-    0.58  0.250 / 0.460
G19     50.3           42.4               11.3 +/-    0.56      15.8 +/-    0.56  0.230 / 0.510
G24     251.2          38.0               14.9 +/-    0.96      22.5 +/-    0.96  0.030 / 0.050
G28     127.7          10.1               16.6 +/-    3.21      46.3 +/-    3.21  0.030 / 0.050