PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-05:12:40
G01     42.3           18.1                2.2 +/-    2.86       5.0 +/-    2.86  0.160 / 0.220
G06     176.9          34.6                6.5 +/-    1.19      10.4 +/-    1.19  0.080 / 0.160
G13     239.2          23.9                6.9 +/-    2.10      13.9 +/-    2.10  0.250 / 0.300
G15     274.1          12.8                2.8 +/-    0.78       7.2 +/-    0.78  0.240 / 0.250
G17     3.9            70.7                5.6 +/-    0.41       5.8 +/-    0.41  0.040 / 0.060
G19     266.8          66.2                6.1 +/-    0.84       6.6 +/-    0.84  0.040 / 0.060
G24     315.9          20.8                1.9 +/-    2.45       4.0 +/-    2.45  0.270 / 0.190
G28     65.7           49.8                4.8 +/-    0.78       6.1 +/-    0.78  0.110 / 0.170
G30     154.3          31.2                7.1 +/-    1.72      12.2 +/-    1.72  0.060 / 0.080