PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-20:42:40
G02     20.3           64.8                9.7 +/-    0.51      10.6 +/-    0.51  0.040 / 0.040
G05     155.5          53.0               13.6 +/-    0.78      16.6 +/-    0.78  0.050 / 0.050
G06     50.2           21.5                8.4 +/-    1.58      17.8 +/-    1.58  0.040 / 0.050
G12     210.8          74.9               12.4 +/-    0.24      12.8 +/-    0.24  0.050 / 0.060
G19     94.9           12.7                9.0 +/-    1.88      23.8 +/-    1.88  0.030 / 0.020
G20     197.1          19.9               15.5 +/-    2.64      34.1 +/-    2.64  0.030 / 0.020
G25     302.9          52.6               11.7 +/-    1.29      14.3 +/-    1.29  0.040 / 0.050
G29     302.6          23.8                9.8 +/-    1.73      19.7 +/-    1.73  0.030 / 0.040