PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-14:27:50
G01     75.0           33.2                5.1 +/-    0.83       8.3 +/-    0.83  0.040 / 0.020
G07     135.3          34.2                8.3 +/-    1.26      13.4 +/-    1.26  0.030 / 0.030
G11     55.7           32.4                5.5 +/-    1.05       9.2 +/-    1.05  0.060 / 0.080
G13     278.7          38.0                7.4 +/-    2.30      11.1 +/-    2.30  0.050 / 0.090
G15     308.0          12.9                6.3 +/-    2.02      16.4 +/-    2.02  0.060 / 0.100
G17     227.7          66.4                7.9 +/-    0.84       8.5 +/-    0.84  0.070 / 0.090
G18     51.6           19.6                6.1 +/-    4.45      13.5 +/-    4.45  0.080 / 0.090
G19     221.6          35.6                9.0 +/-    1.88      14.1 +/-    1.88  0.220 / 0.280
G28     12.9           60.1                8.3 +/-    1.50       9.4 +/-    1.50  0.120 / 0.180
G30     131.2          66.5                7.9 +/-    0.49       8.5 +/-    0.49  0.090 / 0.160