PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-07:57:30
G03     191.1          18.3                5.7 +/-    2.89      13.0 +/-    2.89  0.030 / 0.040
G08     135.4          32.8                7.8 +/-    1.47      13.0 +/-    1.47  0.020 / 0.040
G09     319.9          70.8                3.3 +/-    0.71       3.5 +/-    0.71  0.030 / 0.030
G16     41.9           37.3                2.6 +/-    0.95       4.0 +/-    0.95  0.020 / 0.030
G23     127.4          76.9                3.7 +/-    0.50       3.8 +/-    0.50  0.120 / 0.260
G26     44.1           10.5                1.3 +/-    1.26       3.6 +/-    1.26  0.090 / 0.250
G27     91.8           35.3                5.6 +/-    0.39       8.8 +/-    0.39  0.040 / 0.080
G30     276.7          14.4                7.2 +/-    2.16      18.3 +/-    2.16  0.050 / 0.080