PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-13:28:00
G07     37.9           69.7                9.1 +/-    0.95       9.6 +/-    0.95  0.040 / 0.050
G08     54.2           42.8                8.2 +/-    0.92      11.4 +/-    0.92  0.030 / 0.040
G09     177.4          39.7               10.0 +/-    0.65      14.6 +/-    0.65  0.030 / 0.020
G11     122.6          32.6                8.8 +/-    1.36      14.6 +/-    1.36  0.030 / 0.020
G18     107.8          14.3                8.8 +/-    1.64      22.3 +/-    1.64  0.170 / 0.360
G23     160.2          10.9                8.0 +/-    2.04      21.9 +/-    2.04  0.190 / 0.280
G27     38.0           11.0                8.1 +/-    4.45      22.1 +/-    4.45  0.300 / 0.260
G28     269.1          50.2                8.7 +/-    2.61      10.9 +/-    2.61  0.180 / 0.170
G30     327.0          56.1                8.5 +/-    0.48      10.0 +/-    0.48  0.230 / 0.360