PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-16:28:00
G02     245.9          74.9                8.6 +/-    0.42       8.8 +/-    0.42  0.070 / 0.150
G05     171.4          18.0               10.8 +/-    0.99      25.0 +/-    0.99  0.080 / 0.200
G06     40.6           53.1                7.9 +/-    0.59       9.6 +/-    0.59  0.080 / 0.130
G12     322.9          60.2                8.1 +/-    0.98       9.2 +/-    0.98  0.080 / 0.120
G17     74.1           19.0                7.6 +/-    1.35      17.1 +/-    1.35  0.030 / 0.040
G19     56.9           40.0                8.6 +/-    0.48      12.6 +/-    0.48  0.040 / 0.040
G24     240.1          32.9               10.1 +/-    1.05      16.6 +/-    1.05  0.040 / 0.050
G25     317.1          15.6                6.2 +/-    3.54      15.3 +/-    3.54  0.050 / 0.040