PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-23:13:10
G02     203.0          35.8               14.1 +/-    1.89      22.1 +/-    1.89  0.060 / 0.090
G06     166.2          67.1               12.2 +/-    0.39      13.1 +/-    0.39  0.060 / 0.080
G12     306.6          13.3                9.0 +/-    1.51      23.4 +/-    1.51  0.140 / 0.210
G17     37.2           48.0               10.6 +/-    1.49      13.7 +/-    1.49  0.210 / 0.270
G19     2.2            65.0                9.6 +/-    0.76      10.5 +/-    0.76  0.030 / 0.030
G24     296.0          39.2               10.0 +/-    3.63      14.8 +/-    3.63  0.040 / 0.030
G28     100.6          34.5               12.5 +/-    0.67      20.1 +/-    0.67  0.030 / 0.030