PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-09:42:40
G02     227.1          71.6                5.3 +/-    0.73       5.5 +/-    0.73  0.180 / 0.210
G05     174.7          10.3               -7.8 +/-   12.90     -21.6 +/-   12.90  0.040 / 0.040
G06     44.2           71.1                4.1 +/-    0.45       4.3 +/-    0.45  0.050 / 0.040
G12     320.6          43.7                4.1 +/-    0.41       5.6 +/-    0.41  0.070 / 0.080
G17     66.3           25.4                3.8 +/-    2.45       7.4 +/-    2.45  0.070 / 0.090
G19     51.7           41.8                3.5 +/-    1.01       4.9 +/-    1.01  0.060 / 0.070
G24     254.5          38.3                4.6 +/-    2.18       6.9 +/-    2.18  0.060 / 0.070