PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-22:27:30
G02     201.1          27.7               17.5 +/-    0.90      32.2 +/-    0.90  0.060 / 0.120
G06     171.2          58.6               15.5 +/-    1.44      17.9 +/-    1.44  0.070 / 0.100
G17     29.6           54.1               12.2 +/-    0.67      14.7 +/-    0.67  0.030 / 0.040
G19     343.3          69.1               12.7 +/-    0.64      13.5 +/-    0.64  0.040 / 0.040
G24     304.0          34.8               12.4 +/-    0.93      19.7 +/-    0.93  0.040 / 0.090
G28     92.2           39.5               13.3 +/-    0.65      19.6 +/-    0.65  0.040 / 0.080