PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-16:42:50
G01     275.5          41.3                9.6 +/-    0.85      13.7 +/-    0.85  0.030 / 0.030
G03     315.6          29.7                8.5 +/-    2.26      14.9 +/-    2.26  0.040 / 0.030
G10     127.8          20.0               10.1 +/-    0.69      22.2 +/-    0.69  0.060 / 0.050
G11     256.6          21.8                8.1 +/-    5.52      17.1 +/-    5.52  0.060 / 0.060
G14     37.5           53.2                8.5 +/-    0.83      10.3 +/-    0.83  0.070 / 0.110
G22     314.6          50.4                8.8 +/-    1.45      11.1 +/-    1.45  0.060 / 0.110
G25     56.0           18.0                8.0 +/-    0.85      18.4 +/-    0.85  0.040 / 0.080
G26     149.4          22.6               11.5 +/-    1.23      23.9 +/-    1.23  0.040 / 0.070
G31     62.9           76.0                9.6 +/-    0.49       9.9 +/-    0.49  0.050 / 0.090
G32     61.8           33.9                8.5 +/-    0.94      13.7 +/-    0.94  0.050 / 0.110