PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-17:42:50
G02     216.6          59.0               10.8 +/-    0.78      12.4 +/-    0.78  0.120 / 0.300
G06     57.7           74.2               10.7 +/-    0.43      11.1 +/-    0.43  0.090 / 0.240
G12     317.7          34.6                8.4 +/-    1.51      13.5 +/-    1.51  0.040 / 0.060
G17     55.3           34.5                8.7 +/-    1.91      13.9 +/-    1.91  0.050 / 0.050
G19     40.4           48.0                9.5 +/-    1.20      12.2 +/-    1.20  0.060 / 0.090
G24     265.6          41.2               10.3 +/-    1.94      14.7 +/-    1.94  0.050 / 0.090
G28     120.9          18.9               10.0 +/-    1.21      22.6 +/-    1.21  0.050 / 0.070