PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-10:42:40
G07     313.4          50.2                3.9 +/-    0.85       4.9 +/-    0.85  0.030 / 0.020
G08     121.6          43.1                4.6 +/-    0.66       6.4 +/-    0.66  0.030 / 0.020
G09     278.1          83.9                0.2 +/-    0.54       0.2 +/-    0.54  0.030 / 0.040
G16     42.1           23.4                2.9 +/-    2.94       5.9 +/-    2.94  0.060 / 0.050
G23     146.6          62.4                4.7 +/-    0.95       5.2 +/-    0.95  0.030 / 0.040
G27     74.0           36.5                3.6 +/-    0.94       5.6 +/-    0.94  0.040 / 0.030
G28     225.8          15.4                7.1 +/-    2.80      17.5 +/-    2.80  0.210 / 0.240
G30     287.0          22.1                6.8 +/-    2.03      14.2 +/-    2.03  0.120 / 0.180