PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-20:43:10
G02     23.2           62.9               10.7 +/-    0.82      11.9 +/-    0.82  0.040 / 0.030
G05     153.4          55.2               13.8 +/-    0.62      16.5 +/-    0.62  0.040 / 0.040
G06     51.3           19.7                8.0 +/-    2.30      17.6 +/-    2.30  0.050 / 0.050
G12     205.5          72.7               11.1 +/-    0.68      11.6 +/-    0.68  0.050 / 0.050
G19     96.7           11.4                9.8 +/-    2.05      26.6 +/-    2.05  0.040 / 0.030
G20     197.2          22.1               17.3 +/-    1.86      36.2 +/-    1.86  0.030 / 0.030
G25     299.9          54.3               10.5 +/-    1.39      12.6 +/-    1.39  0.060 / 0.120
G29     304.3          25.5               10.1 +/-    1.08      19.6 +/-    1.08  0.080 / 0.120