PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-07:12:40
G01     220.3          11.2                5.4 +/-    1.79      14.6 +/-    1.79  0.220 / 0.230
G03     268.5          68.7                5.5 +/-    1.12       5.9 +/-    1.12  0.160 / 0.240
G09     300.2          16.0                4.5 +/-    0.97      10.8 +/-    0.97  0.040 / 0.050
G14     94.6           17.5                4.2 +/-    2.30       9.8 +/-    2.30  0.040 / 0.030
G16     141.2          52.6                7.9 +/-    0.86       9.7 +/-    0.86  0.170 / 0.300
G22     201.2          63.3                5.7 +/-    0.41       6.3 +/-    0.41  0.150 / 0.390
G23     312.5          41.9                6.6 +/-    1.04       9.3 +/-    1.04  0.040 / 0.050
G26     85.2           55.4                7.1 +/-    0.78       8.4 +/-    0.78  0.050 / 0.040
G31     48.2           26.4                1.5 +/-    1.94       2.9 +/-    1.94  0.130 / 0.260