PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-21:28:10
G02     201.3          28.1               16.9 +/-    1.30      30.9 +/-    1.30  0.060 / 0.040
G06     165.4          62.4               14.7 +/-    0.27      16.4 +/-    0.27  0.050 / 0.040
G12     303.9          10.8               -6.5 +/-    9.25     -17.8 +/-    9.25  0.090 / 0.000
G17     25.6           56.8               12.4 +/-    0.81      14.5 +/-    0.81  0.040 / 0.040
G19     339.7          69.0               11.4 +/-    0.41      12.1 +/-    0.41  0.030 / 0.040
G24     304.5          34.5               10.5 +/-    2.06      16.8 +/-    2.06  0.050 / 0.080
G28     95.8           35.4               13.2 +/-    1.21      20.7 +/-    1.21  0.070 / 0.080