PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-13:57:50
G01     71.2           33.0                7.1 +/-    0.96      11.7 +/-    0.96  0.030 / 0.030
G07     137.2          31.2                8.6 +/-    1.69      14.7 +/-    1.69  0.030 / 0.030
G11     53.3           30.1                7.2 +/-    0.58      12.5 +/-    0.58  0.060 / 0.070
G13     274.6          37.7                8.9 +/-    1.30      13.5 +/-    1.30  0.040 / 0.070
G15     305.6          13.5                4.9 +/-    3.12      12.7 +/-    3.12  0.050 / 0.060
G17     233.1          69.8                9.2 +/-    1.45       9.7 +/-    1.45  0.030 / 0.040
G18     48.9           18.0                5.5 +/-    1.14      12.6 +/-    1.14  0.040 / 0.090
G19     223.7          38.3                9.0 +/-    2.22      13.4 +/-    2.22  0.060 / 0.100
G28     18.6           59.4                8.3 +/-    0.74       9.5 +/-    0.74  0.060 / 0.140
G30     135.2          63.7                9.8 +/-    0.78      10.8 +/-    0.78  0.070 / 0.160