PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-21:43:00
G02     202.9          34.5               16.1 +/-    0.89      25.7 +/-    0.89  0.030 / 0.040
G06     158.3          69.1               14.5 +/-    0.54      15.4 +/-    0.54  0.040 / 0.040
G12     307.5          15.5                8.9 +/-    1.50      21.9 +/-    1.50  0.110 / 0.280
G17     32.4           52.2               12.1 +/-    1.22      14.8 +/-    1.22  0.090 / 0.330
G19     356.2          66.2               11.6 +/-    0.48      12.6 +/-    0.48  0.030 / 0.020
G24     298.4          38.0               11.9 +/-    1.72      18.0 +/-    1.72  0.040 / 0.030
G28     102.1          31.4               12.9 +/-    0.62      22.0 +/-    0.62  0.080 / 0.090