PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-09:12:30
G02     289.1          81.1                2.5 +/-    0.56       2.5 +/-    0.56  0.160 / 0.120
G05     169.3          24.0                3.0 +/-    1.69       6.0 +/-    1.69  0.180 / 0.140
G06     39.4           50.3                2.1 +/-    0.53       2.7 +/-    0.53  0.030 / 0.030
G12     319.6          61.4                1.8 +/-    0.78       2.1 +/-    0.78  0.050 / 0.040
G17     80.0           14.2                3.0 +/-    3.17       7.6 +/-    3.17  0.220 / 0.140
G19     65.1           34.3                4.2 +/-    2.11       6.7 +/-    2.11  0.120 / 0.130
G24     230.8          27.7                4.4 +/-    2.04       8.1 +/-    2.04  0.040 / 0.030
G25     317.3          27.0                2.5 +/-    2.30       4.8 +/-    2.30  0.030 / 0.040