PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-14:27:50
G01     104.9          26.3                9.0 +/-    0.65      17.0 +/-    0.65  0.040 / 0.060
G07     111.1          53.4                8.5 +/-    0.40      10.3 +/-    0.40  0.040 / 0.060
G08     41.7           17.0                5.8 +/-    1.35      13.6 +/-    1.35  0.030 / 0.030
G09     173.3          10.7                8.4 +/-    3.72      23.1 +/-    3.72  0.030 / 0.040
G11     83.7           40.5                8.0 +/-    0.66      11.5 +/-    0.66  0.070 / 0.140
G13     309.6          28.1                5.5 +/-    1.14      10.0 +/-    1.14  0.090 / 0.130
G17     205.9          42.2                9.8 +/-    1.01      13.8 +/-    1.01  0.020 / 0.050
G19     209.3          16.2                9.7 +/-    1.72      23.3 +/-    1.72  0.030 / 0.060
G28     321.6          61.0                7.8 +/-    1.07       8.7 +/-    1.07  0.070 / 0.180
G30     19.4           77.9                8.3 +/-    0.57       8.5 +/-    0.57  0.070 / 0.170