PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-08:28:00
G02     227.4          69.4                4.3 +/-    0.79       4.6 +/-    0.79  0.060 / 0.080
G06     43.8           67.2                3.4 +/-    0.35       3.6 +/-    0.35  0.070 / 0.080
G12     320.6          44.4                3.1 +/-    0.67       4.2 +/-    0.67  0.020 / 0.030
G17     66.6           24.0                3.5 +/-    2.23       7.0 +/-    2.23  0.030 / 0.030
G19     47.8           44.7                4.6 +/-    0.61       6.3 +/-    0.61  0.030 / 0.050
G24     247.2          38.2                5.6 +/-    1.58       8.5 +/-    1.58  0.030 / 0.050
G25     315.3          12.1                1.4 +/-    9.82       3.8 +/-    9.82  0.300 / 0.350