PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-18:28:10
G02     216.3          58.3               12.5 +/-    1.16      14.4 +/-    1.16  0.050 / 0.060
G06     56.2           72.8               12.4 +/-    0.34      12.9 +/-    0.34  0.060 / 0.070
G12     319.5          39.1                9.3 +/-    0.70      13.7 +/-    0.70  0.030 / 0.030
G17     57.2           32.5                9.0 +/-    1.70      15.0 +/-    1.70  0.040 / 0.020
G19     35.7           51.5               11.4 +/-    1.61      14.1 +/-    1.61  0.050 / 0.080
G24     264.0          41.9               12.9 +/-    2.64      18.2 +/-    2.64  0.060 / 0.080
G28     122.5          13.9               10.9 +/-    2.28      28.0 +/-    2.28  0.040 / 0.040