PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-22:12:30
G02     203.0          35.4               19.6 +/-    1.80      30.8 +/-    1.80  0.140 / 0.330
G06     157.8          69.7               15.2 +/-    0.62      16.1 +/-    0.62  0.110 / 0.230
G12     307.8          15.7                9.6 +/-    2.70      23.4 +/-    2.70  0.130 / 0.090
G17     32.6           52.0               12.2 +/-    1.19      15.0 +/-    1.19  0.070 / 0.080
G19     358.0          65.8               11.7 +/-    0.52      12.8 +/-    0.52  0.030 / 0.040
G24     297.8          38.2               13.0 +/-    2.12      19.5 +/-    2.12  0.040 / 0.030
G28     102.7          30.9               13.6 +/-    0.57      23.4 +/-    0.57  0.070 / 0.110