PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-20:28:00
G03     242.0          69.5               11.2 +/-    0.95      11.8 +/-    0.95  0.040 / 0.040
G09     301.3          15.0                7.0 +/-    2.05      17.5 +/-    2.05  0.040 / 0.040
G14     97.1           17.1               10.4 +/-    1.25      24.6 +/-    1.25  0.120 / 0.270
G16     134.9          56.4               13.1 +/-    0.45      15.3 +/-    0.45  0.120 / 0.270
G22     196.6          58.5               12.6 +/-    0.58      14.5 +/-    0.58  0.200 / 0.150
G23     317.3          47.1                9.1 +/-    0.92      12.0 +/-    0.92  0.120 / 0.240
G26     74.3           53.1                9.9 +/-    0.93      12.1 +/-    0.93  0.030 / 0.050
G31     50.6           22.0                6.8 +/-    2.59      14.2 +/-    2.59  0.030 / 0.040