PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/14-20:27:50
G02     42.4           48.0               10.9 +/-    0.85      14.0 +/-    0.85  0.050 / 0.070
G05     120.7          70.0               12.6 +/-    0.59      13.4 +/-    0.59  0.060 / 0.070
G12     189.4          52.7               13.1 +/-    0.62      16.0 +/-    0.62  0.040 / 0.060
G20     200.0          40.6               14.3 +/-    1.85      20.6 +/-    1.85  0.040 / 0.060
G25     264.1          60.4               12.2 +/-    1.20      13.9 +/-    1.20  0.030 / 0.030
G29     317.3          40.0               11.7 +/-    1.10      17.0 +/-    1.10  0.030 / 0.050