PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-06:43:10
G01     297.7          38.1                6.6 +/-    1.95       9.9 +/-    1.95  0.040 / 0.050
G10     114.4          34.5                5.9 +/-    0.47       9.5 +/-    0.47  0.030 / 0.040
G11     268.7          28.9                6.1 +/-    1.06      11.0 +/-    1.06  0.080 / 0.060
G14     17.8           61.2                4.3 +/-    0.84       4.9 +/-    0.84  0.050 / 0.080
G18     122.2          9.5                 5.5 +/-    2.68      15.5 +/-    2.68  0.090 / 0.080
G22     312.6          34.5                3.8 +/-    1.15       6.1 +/-    1.15  0.080 / 0.080
G25     68.7           17.3                6.2 +/-    0.91      14.5 +/-    0.91  0.040 / 0.070
G31     151.6          74.5                6.0 +/-    0.45       6.2 +/-    0.45  0.050 / 0.070
G32     44.7           46.6                4.5 +/-    0.61       6.0 +/-    0.61  0.100 / 0.120