PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-09:12:30
G03     244.1          67.6                5.6 +/-    4.71       6.0 +/-    4.71  0.050 / 0.070
G07     248.7          10.2               -9.0 +/-    6.46     -25.0 +/-    6.46  0.050 / 0.070
G09     304.6          20.7                7.0 +/-    2.95      15.1 +/-    2.95  0.140 / 0.370
G14     101.0          12.4                0.4 +/-    2.44       1.0 +/-    2.44  0.030 / 0.050
G16     127.6          59.7               -8.2 +/-    4.46      -9.4 +/-    4.46  0.030 / 0.060
G22     192.8          54.5                8.1 +/-    0.54       9.7 +/-    0.54  0.040 / 0.070
G23     318.7          48.3               18.9 +/-    5.70      24.4 +/-    5.70  0.060 / 0.080
G26     69.8           52.4             -117.7 +/-   40.41    -144.2 +/-   40.41  0.130 / 0.510
G31     52.3           19.3               14.4 +/-    6.73      32.2 +/-    6.73  0.130 / 0.580