PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-19:12:30
G02     213.4          56.0               12.9 +/-    1.51      15.2 +/-    1.51  0.050 / 0.090
G06     71.6           77.7               11.1 +/-    0.69      11.3 +/-    0.69  0.070 / 0.070
G12     316.3          30.7               11.8 +/-    1.16      20.3 +/-    1.16  0.070 / 0.210
G17     52.9           35.9               10.3 +/-    0.72      16.1 +/-    0.72  0.100 / 0.210
G19     35.8           50.7                9.8 +/-    0.42      12.3 +/-    0.42  0.040 / 0.080
G24     270.3          42.0               12.6 +/-    1.01      17.7 +/-    1.01  0.050 / 0.060
G28     118.3          21.3               13.7 +/-    0.99      29.2 +/-    0.99  0.050 / 0.110