PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-07:12:30
G02     344.7          79.5                3.0 +/-    0.37       3.0 +/-    0.37  0.080 / 0.080
G05     164.7          31.7                5.6 +/-    1.63       9.5 +/-    1.63  0.070 / 0.080
G06     40.2           45.8                1.3 +/-    1.12       1.8 +/-    1.12  0.030 / 0.030
G12     315.0          67.0                3.8 +/-    0.58       4.1 +/-    0.58  0.040 / 0.030
G17     84.1           13.4                4.3 +/-    2.00      11.1 +/-    2.00  0.090 / 0.200
G19     73.4           28.2                3.4 +/-    1.39       6.2 +/-    1.39  0.210 / 0.210
G24     231.2          24.6                4.8 +/-    1.51       9.5 +/-    1.51  0.130 / 0.150
G25     317.7          26.1                4.0 +/-    1.74       7.6 +/-    1.74  0.170 / 0.190