PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-01:43:10
G08     306.3          20.7                8.8 +/-    2.94      19.0 +/-    2.94  0.080 / 0.070
G10     333.9          60.2                7.7 +/-    0.51       8.7 +/-    0.51  0.060 / 0.070
G14     219.3          34.5               14.0 +/-    1.60      22.5 +/-    1.60  0.070 / 0.040
G15     47.1           10.6                8.5 +/-    1.90      23.4 +/-    1.90  0.120 / 0.060
G18     40.3           59.1                8.0 +/-    0.88       9.2 +/-    0.88  0.030 / 0.040
G21     135.8          54.6               12.1 +/-    0.40      14.4 +/-    0.40  0.030 / 0.050
G24     73.2           30.5                9.3 +/-    0.64      16.1 +/-    0.64  0.050 / 0.070
G27     270.2          37.2               10.2 +/-    2.37      15.5 +/-    2.37  0.050 / 0.070
G32     225.4          52.6               12.0 +/-    2.30      14.7 +/-    2.30  0.100 / 0.150