PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-16:13:10
G01     65.7           31.8               -7.2 +/-   18.05     -12.2 +/-   18.05  0.050 / 0.100
G06     181.2          10.7              -11.1 +/-   41.19     -30.5 +/-   41.19  0.070 / 0.110
G07     139.4          23.6                9.8 +/-    1.09      19.8 +/-    1.09  0.090 / 0.180
G11     50.0           24.8                7.9 +/-    2.20      15.5 +/-    2.20  0.100 / 0.220
G13     271.4          36.3               11.8 +/-    2.36      18.2 +/-    2.36  0.040 / 0.040
G15     302.4          14.5                6.3 +/-    2.21      16.0 +/-    2.21  0.040 / 0.050
G17     245.8          75.2               12.7 +/-    0.64      13.0 +/-    0.64  0.070 / 0.200
G19     227.9          48.0              -53.4 +/-   55.40     -69.1 +/-   55.40  0.080 / 0.190
G28     26.8           58.1                4.4 +/-    3.28       5.1 +/-    3.28  0.030 / 0.050
G30     138.8          60.3               12.8 +/-    1.01      14.5 +/-    1.01  0.040 / 0.060