PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-07:28:10
G02     222.0          69.0                5.6 +/-    0.49       6.0 +/-    0.49  0.050 / 0.050
G06     47.4           69.0                5.3 +/-    0.40       5.6 +/-    0.40  0.040 / 0.040
G12     320.2          43.1                4.2 +/-    0.68       5.8 +/-    0.68  0.060 / 0.060
G17     62.0           27.8                3.5 +/-    1.14       6.4 +/-    1.14  0.050 / 0.050
G19     47.3           43.5                5.3 +/-    0.65       7.3 +/-    0.65  0.090 / 0.220
G24     259.3          39.4                6.1 +/-    2.10       9.0 +/-    2.10  0.080 / 0.200
G28     124.0          17.4                8.0 +/-    1.24      18.9 +/-    1.24  0.040 / 0.040