PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-14:12:40
G01     109.9          23.7                8.5 +/-    1.12      17.2 +/-    1.12  0.210 / 0.250
G07     103.8          57.2                7.9 +/-    0.69       9.2 +/-    0.69  0.130 / 0.230
G08     42.1           21.2                5.9 +/-    2.12      12.6 +/-    2.12  0.030 / 0.020
G09     174.2          15.1                5.8 +/-    1.78      14.4 +/-    1.78  0.030 / 0.020
G11     90.4           40.4                8.8 +/-    1.18      12.7 +/-    1.18  0.030 / 0.040
G13     313.3          24.9                5.3 +/-    1.69      10.3 +/-    1.69  0.030 / 0.030
G17     203.9          37.0               10.6 +/-    0.91      16.2 +/-    0.91  0.110 / 0.210
G19     208.0          11.7                1.2 +/-    9.37       3.1 +/-    9.37  0.080 / 0.210
G28     311.7          60.2                6.2 +/-    0.83       7.1 +/-    0.83  0.080 / 0.120
G30     2.2            74.6                7.0 +/-    0.68       7.3 +/-    0.68  0.070 / 0.130