PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-07:42:50
G01     257.3          38.0                5.0 +/-    1.78       7.6 +/-    1.78  0.080 / 0.090
G03     316.4          36.1                4.9 +/-    1.11       7.7 +/-    1.11  0.050 / 0.080
G10     134.9          9.9                 5.1 +/-    3.78      14.4 +/-    3.78  0.060 / 0.080
G11     239.0          16.0                5.9 +/-    1.72      14.3 +/-    1.72  0.080 / 0.080
G14     55.9           42.7                3.8 +/-    0.83       5.3 +/-    0.83  0.180 / 0.220
G22     310.1          62.3                3.4 +/-    0.86       3.8 +/-    0.86  0.170 / 0.280
G25     40.7           10.3                1.3 +/-    2.70       3.6 +/-    2.70  0.030 / 0.040
G26     142.1          32.7                5.6 +/-    0.64       9.4 +/-    0.64  0.040 / 0.030
G31     42.7           64.2                3.3 +/-    0.37       3.7 +/-    0.37  0.110 / 0.310
G32     72.3           26.9                2.5 +/-    1.51       4.7 +/-    1.51  0.100 / 0.250