PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-21:42:40
G02     202.9          34.5               18.3 +/-    1.49      29.2 +/-    1.49  0.040 / 0.040
G06     158.3          69.1               14.9 +/-    1.12      15.8 +/-    1.12  0.040 / 0.040
G12     307.5          15.5                9.6 +/-    2.26      23.7 +/-    2.26  0.050 / 0.100
G17     32.4           52.2               12.0 +/-    0.70      14.8 +/-    0.70  0.060 / 0.090
G19     356.2          66.2               11.7 +/-    0.95      12.7 +/-    0.95  0.060 / 0.100
G24     298.4          38.0               12.9 +/-    1.55      19.4 +/-    1.55  0.070 / 0.110
G28     102.1          31.4               14.7 +/-    0.75      25.0 +/-    0.75  0.150 / 0.490