PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-14:43:10
G02     231.9          68.5                7.5 +/-    0.60       8.0 +/-    0.60  0.110 / 0.310
G05     175.2          11.4                2.9 +/-   26.02       7.8 +/-   26.02  0.160 / 0.300
G06     41.8           60.7                6.5 +/-    0.42       7.4 +/-    0.42  0.100 / 0.110
G12     322.2          51.8                5.9 +/-    1.38       7.3 +/-    1.38  0.080 / 0.100
G17     68.9           23.0                5.8 +/-    0.54      11.8 +/-    0.54  0.040 / 0.060
G19     49.4           44.5                5.4 +/-    0.65       7.4 +/-    0.65  0.030 / 0.060
G24     245.8          36.5                9.2 +/-    1.59      14.2 +/-    1.59  0.030 / 0.030
G25     315.9          11.4               -8.4 +/-   32.85     -22.8 +/-   32.85  0.050 / 0.040