PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/14-20:12:30
G02     36.4           53.1               11.9 +/-    1.76      14.5 +/-    1.76  0.030 / 0.050
G05     138.1          65.7               13.7 +/-    0.41      14.9 +/-    0.41  0.030 / 0.050
G06     57.5           11.3                9.2 +/-    1.62      24.9 +/-    1.62  0.030 / 0.030
G12     192.7          60.3               13.7 +/-    1.02      15.5 +/-    1.02  0.040 / 0.040
G20     198.7          33.6               13.5 +/-    1.16      22.0 +/-    1.16  0.040 / 0.040
G25     279.2          59.9               17.2 +/-    0.91      19.6 +/-    0.91  0.040 / 0.040
G29     312.8          34.7                9.1 +/-    1.94      14.5 +/-    1.94  0.050 / 0.090