PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-00:42:30
G10     256.8          31.5               13.8 +/-   36.91      23.4 +/-   36.91  0.140 / 0.460
G13     47.9           25.6                9.9 +/-    2.47      19.1 +/-    2.47  0.160 / 0.380
G15     76.5           56.9               10.8 +/-    2.67      12.6 +/-    2.67  0.120 / 0.370
G16     287.4          15.0                5.4 +/-   13.24      13.4 +/-   13.24  0.120 / 0.390
G20     266.9          39.6               11.3 +/-   37.10      16.6 +/-   37.10  0.040 / 0.050
G21     341.6          64.4                6.7 +/-    8.25       7.3 +/-    8.25  0.050 / 0.050
G26     259.9          12.7               14.6 +/-   32.16      38.3 +/-   32.16  0.120 / 0.110
G27     322.1          10.5              -16.3 +/-   17.88     -45.0 +/-   17.88  0.090 / 0.090
G29     166.9          43.3               11.3 +/-    9.23      15.7 +/-    9.23  0.050 / 0.070