PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-11:57:40
G07     359.1          64.7                2.0 +/-    0.95       2.2 +/-    0.95  0.040 / 0.030
G08     76.5           50.8                1.8 +/-    0.36       2.3 +/-    0.36  0.040 / 0.020
G09     178.8          59.3                6.5 +/-    0.80       7.4 +/-    0.80  0.030 / 0.030
G11     135.6          20.1                2.9 +/-    1.98       6.4 +/-    1.98  0.030 / 0.030
G23     158.9          31.7                3.2 +/-    1.11       5.4 +/-    1.11  0.070 / 0.080
G27     45.5           23.9                2.1 +/-    2.28       4.2 +/-    2.28  0.050 / 0.090
G28     247.6          38.3                5.3 +/-    1.38       8.0 +/-    1.38  0.080 / 0.080
G30     309.6          40.8                2.9 +/-    1.25       4.2 +/-    1.25  0.060 / 0.050