PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-14:57:50
G02     203.1          27.4               10.7 +/-    2.62      19.9 +/-    2.62  0.070 / 0.080
G06     159.6          66.1                9.1 +/-    0.78       9.8 +/-    0.78  0.090 / 0.090
G12     306.6          16.4                7.5 +/-    2.08      18.0 +/-    2.08  0.150 / 0.220
G17     33.7           51.0                8.6 +/-    1.37      10.7 +/-    1.37  0.120 / 0.290
G19     340.2          68.4                8.3 +/-    0.88       8.9 +/-    0.88  0.030 / 0.030
G24     300.9          37.2                6.7 +/-    1.17      10.2 +/-    1.17  0.040 / 0.030
G28     98.0           34.2                7.8 +/-    0.54      12.6 +/-    0.54  0.030 / 0.030