PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-10:58:00
G01     261.1          39.0                7.7 +/-    0.93      11.5 +/-    0.93  0.060 / 0.100
G03     316.6          37.4                5.6 +/-    1.09       8.5 +/-    1.09  0.060 / 0.090
G10     133.7          11.0                3.8 +/-    0.64      10.3 +/-    0.64  0.040 / 0.070
G11     245.0          16.6                5.8 +/-    2.30      14.0 +/-    2.30  0.040 / 0.080
G14     47.0           49.4                4.4 +/-    0.80       5.6 +/-    0.80  0.040 / 0.050
G18     228.2          34.0                9.0 +/-    1.44      14.5 +/-    1.44  0.040 / 0.050
G22     310.9          62.9                5.3 +/-    0.74       5.9 +/-    0.74  0.120 / 0.340
G25     46.5           14.5                0.7 +/-    0.84       1.8 +/-    0.84  0.120 / 0.360
G31     44.7           64.3                5.1 +/-    0.64       5.6 +/-    0.64  0.150 / 0.230
G32     71.4           26.4                3.0 +/-    1.13       5.8 +/-    1.13  0.150 / 0.210