PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-22:43:10
G02     88.6           10.9               10.8 +/-    1.88      29.5 +/-    1.88  0.120 / 0.260
G05     45.5           29.9                8.7 +/-    1.06      15.3 +/-    1.06  0.080 / 0.260
G13     91.6           36.3                9.8 +/-    0.86      15.1 +/-    0.86  0.120 / 0.240
G15     140.1          43.5               12.9 +/-    1.05      17.8 +/-    1.05  0.130 / 0.260
G18     236.2          32.6               11.8 +/-    1.15      19.7 +/-    1.15  0.050 / 0.110
G20     17.9           75.9               10.3 +/-    0.76      10.6 +/-    0.76  0.050 / 0.100
G25     201.0          16.8               14.5 +/-    2.65      34.4 +/-    2.65  0.020 / 0.030
G26     300.4          19.1                9.5 +/-    2.02      21.4 +/-    2.02  0.020 / 0.030
G29     137.8          81.5               10.9 +/-    1.19      11.0 +/-    1.19  0.040 / 0.040