PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-11:58:00
G01     246.7          33.0                4.2 +/-    1.67       7.0 +/-    1.67  0.060 / 0.080
G03     314.7          49.4                3.4 +/-    0.77       4.3 +/-    0.77  0.050 / 0.090
G14     61.1           42.2                3.5 +/-    1.40       4.9 +/-    1.40  0.040 / 0.030
G16     159.6          23.1               -4.5 +/-   11.38      -9.2 +/-   11.38  0.040 / 0.040
G18     218.6          24.6                3.9 +/-    2.66       7.6 +/-    2.66  0.110 / 0.110
G22     291.3          74.1                5.0 +/-    0.33       5.2 +/-    0.33  0.080 / 0.100
G23     291.8          25.8                2.5 +/-    3.54       4.7 +/-    3.54  0.080 / 0.140
G26     129.6          42.0                5.0 +/-    0.67       7.1 +/-    0.67  0.100 / 0.180
G31     40.9           51.9                3.5 +/-    0.86       4.4 +/-    0.86  0.050 / 0.070
G32     81.6           18.9                3.6 +/-    1.61       8.2 +/-    1.61  0.060 / 0.060