PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-07:57:40
G02     223.9          67.2                3.9 +/-    0.66       4.2 +/-    0.66  0.060 / 0.100
G06     46.4           70.0                3.7 +/-    0.64       3.9 +/-    0.64  0.050 / 0.080
G12     320.1          41.8                3.8 +/-    1.03       5.4 +/-    1.03  0.040 / 0.030
G17     64.6           25.5                3.4 +/-    0.95       6.7 +/-    0.95  0.030 / 0.030
G19     45.2           46.1                2.9 +/-    0.61       3.8 +/-    0.61  0.040 / 0.060
G24     250.4          39.4                4.3 +/-    1.19       6.3 +/-    1.19  0.040 / 0.060
G28     126.6          10.2                5.6 +/-    4.46      15.6 +/-    4.46  0.160 / 0.430