PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-21:57:40
G02     216.0          60.4               15.6 +/-    0.82      17.6 +/-    0.82  0.050 / 0.070
G06     56.6           73.5               11.7 +/-    0.43      12.1 +/-    0.43  0.050 / 0.070
G12     318.9          37.1               10.4 +/-    1.47      15.9 +/-    1.47  0.060 / 0.080
G17     55.9           34.5               11.6 +/-    1.48      18.6 +/-    1.48  0.080 / 0.070
G19     37.4           50.5               11.1 +/-    1.58      14.0 +/-    1.58  0.030 / 0.020
G24     264.8          41.7               16.1 +/-    1.49      22.8 +/-    1.49  0.030 / 0.040
G28     122.7          13.5               14.1 +/-    1.71      36.5 +/-    1.71  0.030 / 0.040