PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-21:58:10
G10     273.2          41.0               15.7 +/-    0.80      22.5 +/-    0.80  0.080 / 0.060
G13     40.2           15.3               11.4 +/-    2.28      28.2 +/-    2.28  0.070 / 0.070
G15     54.0           44.4               14.0 +/-    0.99      19.1 +/-    0.99  0.140 / 0.220
G18     314.3          66.0               15.2 +/-    0.65      16.5 +/-    0.65  0.110 / 0.190
G20     58.7           30.2               13.5 +/-    1.67      23.6 +/-    1.67  0.350 / 0.320
G21     25.9           75.4               16.2 +/-    0.84      16.6 +/-    0.84  0.450 / 0.310
G24     116.6          17.3               17.7 +/-    1.02      41.6 +/-    1.02  0.090 / 0.120
G27     314.6          24.6               13.6 +/-    1.32      26.9 +/-    1.32  0.110 / 0.160
G29     166.7          21.2               16.1 +/-    1.04      34.5 +/-    1.04  0.060 / 0.120
G32     206.2          12.1                7.2 +/-   44.30      19.1 +/-   44.30  0.060 / 0.110