PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-20:27:40
G05     45.7           29.0               11.9 +/-    1.66      21.3 +/-    1.66  0.090 / 0.240
G13     90.0           36.6               14.5 +/-    0.66      22.3 +/-    0.66  0.090 / 0.250
G15     136.8          45.2               15.2 +/-    1.01      20.4 +/-    1.01  0.080 / 0.260
G18     237.5          34.7               18.7 +/-    1.17      29.8 +/-    1.17  0.090 / 0.230
G20     17.8           75.2               14.5 +/-    0.64      14.9 +/-    0.64  0.050 / 0.100
G21     305.1          42.2               15.6 +/-    0.95      21.9 +/-    0.95  0.040 / 0.090
G25     201.6          16.5               19.1 +/-    2.02      45.9 +/-    2.02  0.040 / 0.100
G26     300.3          18.7               12.7 +/-    1.63      28.8 +/-    1.63  0.040 / 0.090
G29     141.1          78.3               15.3 +/-    0.30      15.6 +/-    0.30  0.020 / 0.030