PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-17:43:10
G02     215.9          56.7               13.0 +/-    0.91      15.2 +/-    0.91  0.060 / 0.060
G06     58.8           74.6               10.3 +/-    0.64      10.7 +/-    0.64  0.050 / 0.050
G12     319.0          36.7                9.1 +/-    1.81      14.0 +/-    1.81  0.070 / 0.080
G17     59.2           30.1                9.9 +/-    1.12      17.3 +/-    1.12  0.050 / 0.060
G19     41.9           47.6                9.1 +/-    0.95      11.9 +/-    0.95  0.080 / 0.070
G24     268.1          41.5               10.9 +/-    1.45      15.4 +/-    1.45  0.050 / 0.070
G28     122.9          13.3               11.7 +/-    1.54      30.2 +/-    1.54  0.040 / 0.090