PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-20:12:50
G02     82.3           15.0               13.6 +/-    1.67      33.9 +/-    1.67  0.110 / 0.190
G05     44.4           38.6               12.0 +/-    0.73      17.9 +/-    0.73  0.130 / 0.150
G13     102.9          33.0               15.5 +/-    1.02      25.6 +/-    1.02  0.110 / 0.280
G15     146.5          36.3               17.5 +/-    1.20      27.2 +/-    1.20  0.280 / 0.380
G18     230.3          25.9               16.1 +/-    2.50      30.7 +/-    2.50  0.040 / 0.070
G20     338.6          84.8               13.7 +/-    0.80      13.8 +/-    0.80  0.040 / 0.080
G21     295.8          35.7               14.6 +/-    1.26      22.8 +/-    1.26  0.020 / 0.020
G25     207.0          25.4               14.8 +/-    1.66      28.7 +/-    1.66  0.020 / 0.020
G26     309.8          16.0               12.2 +/-    1.69      29.6 +/-    1.69  0.040 / 0.040
G29     53.6           85.9               15.8 +/-    0.18      15.8 +/-    0.18  0.040 / 0.040