PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-22:12:30
G02     213.9          58.1               14.1 +/-    1.08      16.3 +/-    1.08  0.080 / 0.080
G06     63.6           75.6               12.0 +/-    0.54      12.4 +/-    0.54  0.060 / 0.110
G12     318.0          34.6               10.0 +/-    2.00      16.1 +/-    2.00  0.050 / 0.060
G17     53.6           36.3               11.0 +/-    2.07      17.1 +/-    2.07  0.090 / 0.080
G19     34.4           52.0               12.3 +/-    1.69      15.2 +/-    1.69  0.030 / 0.020
G24     268.4          42.1               13.1 +/-    2.85      18.4 +/-    2.85  0.030 / 0.020
G28     121.1          15.3               15.0 +/-    1.58      37.1 +/-    1.58  0.040 / 0.050