PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-21:42:50
G02     199.9          20.3               19.2 +/-    1.33      42.0 +/-    1.33  0.080 / 0.160
G06     173.6          50.6               15.3 +/-    1.38      19.1 +/-    1.38  0.090 / 0.160
G13     226.9          13.9               17.0 +/-    1.91      43.3 +/-    1.91  0.050 / 0.080
G17     21.6           60.1               12.6 +/-    0.61      14.3 +/-    0.61  0.050 / 0.080
G19     320.3          71.4               11.6 +/-    0.83      12.2 +/-    0.83  0.150 / 0.270
G24     309.8          29.8               11.4 +/-    1.19      20.0 +/-    1.19  0.110 / 0.340
G28     83.5           43.8               13.8 +/-    0.52      18.9 +/-    0.52  0.050 / 0.050
G30     156.4          13.8               19.2 +/-    2.42      49.0 +/-    2.42  0.040 / 0.060