PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-21:58:10
G02     200.1          22.0               17.8 +/-    1.61      37.3 +/-    1.61  0.100 / 0.310
G06     173.3          52.4               16.6 +/-    1.09      20.3 +/-    1.09  0.080 / 0.320
G13     225.7          12.8               17.6 +/-    2.49      46.0 +/-    2.49  0.070 / 0.120
G17     23.6           58.7               13.6 +/-    0.58      15.7 +/-    0.58  0.070 / 0.120
G19     325.9          71.1               13.4 +/-    0.91      14.1 +/-    0.91  0.060 / 0.080
G24     308.6          31.0               12.8 +/-    1.61      22.0 +/-    1.61  0.050 / 0.080
G28     85.5           42.9               14.0 +/-    0.33      19.5 +/-    0.33  0.040 / 0.040
G30     156.6          12.4               14.4 +/-    1.19      38.0 +/-    1.19  0.040 / 0.050