PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-09:12:30
G02     206.1          46.2                7.8 +/-    0.60      10.3 +/-    0.60  0.110 / 0.170
G06     156.3          76.1                6.3 +/-    0.65       6.4 +/-    0.65  0.090 / 0.170
G12     312.3          21.6                2.8 +/-    1.70       6.0 +/-    1.70  0.110 / 0.210
G17     45.9           41.3                2.1 +/-    1.47       3.0 +/-    1.47  0.080 / 0.130
G19     21.9           58.1                3.8 +/-    1.31       4.4 +/-    1.31  0.030 / 0.070
G24     287.8          40.9               10.3 +/-    4.26      14.8 +/-    4.26  0.030 / 0.060
G28     111.9          23.8                6.8 +/-    1.28      13.6 +/-    1.28  0.060 / 0.070