PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:57:50
G02     200.6          25.2               17.1 +/-    1.89      33.2 +/-    1.89  0.080 / 0.110
G06     171.9          56.1               15.8 +/-    1.25      18.7 +/-    1.25  0.070 / 0.110
G13     223.4          10.7               19.8 +/-    1.61      54.3 +/-    1.61  0.160 / 0.440
G17     27.0           56.2               13.5 +/-    0.72      15.9 +/-    0.72  0.220 / 0.530
G19     336.4          70.1               13.6 +/-    0.87      14.4 +/-    0.87  0.040 / 0.040
G24     306.2          33.2               13.7 +/-    1.80      22.4 +/-    1.80  0.040 / 0.040
G28     89.3           41.0               13.9 +/-    0.38      19.9 +/-    0.38  0.040 / 0.090