PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-14:43:00
G03     217.2          62.3                8.8 +/-    0.74       9.8 +/-    0.74  0.160 / 0.410
G07     252.6          11.2                5.0 +/-   11.36      13.7 +/-   11.36  0.170 / 0.470
G09     307.3          23.2                5.3 +/-    1.40      10.9 +/-    1.40  0.040 / 0.060
G14     104.3          13.1                8.6 +/-    1.64      22.3 +/-    1.64  0.040 / 0.070
G16     107.3          63.1                8.8 +/-    1.03       9.7 +/-    1.03  0.040 / 0.050
G22     185.2          43.6                8.2 +/-    1.24      11.2 +/-    1.24  0.030 / 0.060
G23     330.5          59.3                7.6 +/-    1.24       8.7 +/-    1.24  0.080 / 0.520
G26     57.8           45.8                6.9 +/-    0.48       9.2 +/-    0.48  0.080 / 0.450
G31     56.7           12.5                6.9 +/-    1.03      18.3 +/-    1.03  0.030 / 0.040